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Top 50 Clean Energy Startup Investors in United States (October 2026)

The most active venture capital funds and angel investors investing in United States Clean Energy startups. This investor list is updated monthly from the Shizune investor database, ranked by number of investments in United States Clean Energy startup companies. Find investors to raise a Seed, Series A or Series B round with Shizune.
Investor Relevant Deals Geography Stage Focus Round Size
Breakthrough Energy Ventures
VC Fund
12 United States, Canada, United Kingdom Series A, Series B, Seed Energy, Renewable Energy, Manufacturing $2M–$195M
Alumni Ventures
VC Fund
11 United States, United Kingdom, Canada Seed, Series A, Series B Software, Artificial Intelligence, Health Care $850k–$75M
Third Sphere
VC Fund
10 United States, United Kingdom, Israel Seed, Pre-Seed, Convertible Note Software, Energy, Real Estate $100k–$7.5M
Clean Energy Venture Group
VC Fund
10 United States, Canada Seed, Series A, Convertible Note Energy, Renewable Energy, Manufacturing $630k–$11M
Lowercarbon Capital
VC Fund
10 United States, United Kingdom, France Series A, Seed, Series B Renewable Energy, Energy, Manufacturing $3M–$150M
Everywhere Ventures
VC Fund
9 United States, United Kingdom, Australia Seed, Pre-Seed, Series A Software, Health Care, Artificial Intelligence $250k–$20M
Energy Impact Partners
VC Fund
9 United States, Canada, United Kingdom Series A, Series B, Series C Software, Energy, Renewable Energy $8.8M–$111M
Khosla Ventures
VC Fund
9 United States, United Kingdom, India Series A, Seed, Series B Artificial Intelligence, Software, Health Care $1.8M–$100M
Collaborative Fund
VC Fund
8 United States, United Kingdom, South Korea Seed, Series A, Series B Software, Food and Beverage, Artificial Intelligence $1.2M–$75M
Wonder Ventures
VC Fund
7 United States Seed, Pre-Seed, Series A Software, Internet, Health Care $620k–$46M
Powerhouse Ventures
VC Fund
7 United States, India, Canada Seed, Series A, Pre-Seed Software, Energy, Solar $1.1M–$30M
AP Ventures
VC Fund
6 United States, United Kingdom, France Series A, Seed, Series B Energy, Renewable Energy, Manufacturing $3.1M–$139M
Massachusetts Clean Energy Center
VC Fund
6 United States, United Kingdom, Italy Grant, Seed, Series A Energy, Renewable Energy, Manufacturing $50k–$10M
Safar Partners
VC Fund
6 United States, China, Italy Seed, Series A, Series B Biotechnology, Health Care, Information Technology $1.5M–$863M
Jericho Energy Ventures
VC Fund
6 United States Series A, Corporate Round Energy, CleanTech, GreenTech $3M–$11M
Prelude Ventures
VC Fund
6 United States, Canada Series A, Series B, Seed Software, Energy, Renewable Energy $2.5M–$101M
Good Growth Capital
VC Fund
6 United States, France, Israel Seed, Series A, Convertible Note Health Care, Biotechnology, Software $25k–$24M
Shell Ventures
VC Fund
5 United States, United Kingdom, India Series A, Series B, Venture - Series Unknown Energy, Renewable Energy, Software $2.8M–$126M
Foothill Ventures
VC Fund
5 United States, China, Canada Seed, Series A Artificial Intelligence, Software, Biotechnology $1.5M–$35M
The Engine
VC Fund
5 United States Seed, Series A, Series B Biotechnology, Health Care, Software $2M–$150M
Clean Energy Ventures
VC Fund
5 United States, Canada, Israel Seed, Series A, Series B Manufacturing, Energy, Renewable Energy $1.5M–$33M
BoxGroup
VC Fund
5 United States, United Kingdom, Canada Seed, Series A, Series B Software, Artificial Intelligence, Information Technology $1.6M–$100M
Crosscut Ventures
VC Fund
5 United States, Colombia Seed, Series A, Pre-Seed Software, Information Technology, Internet $1M–$25M
Climate Pledge Fund
VC Fund
5 United States, Canada, India Series A, Series B, Seed Energy, CleanTech, Manufacturing $2M–$246M
Tamarack Global
VC Fund
5 United States, Denmark, United Kingdom Seed, Series A, Series B Artificial Intelligence, Information Technology, Internet $1.8M–$700M
Anzu Partners
VC Fund
5 United States, Canada, Spain Series A, Series B, Venture - Series Unknown Software, Biotechnology, Manufacturing $5M–$44M
Bolt
VC Fund
5 United States, Canada Seed, Pre-Seed, Series A Software, Health Care, Hardware $130k–$15M
Overture Ventures
VC Fund
5 United States, Canada Seed, Series A, Series B Energy, Renewable Energy, Manufacturing $2M–$150M
Backstage Capital
VC Fund
4 United States, United Kingdom, Trinidad and Tobago Seed, Pre-Seed, Series A Software, Health Care, Internet $100k–$20M
Amplify.LA
VC Fund
4 United States, Canada Seed, Pre-Seed, Series A Software, SaaS, Health Care $200k–$10M
Network.VC
VC Fund
4 United States, Israel, Ukraine Seed, Pre-Seed, Series A Software, Artificial Intelligence, Information Technology $350k–$22M
New York Ventures
VC Fund
4 United States, Canada, Israel Seed, Series A, Series B Health Care, Biotechnology, Software $1M–$53M
DCVC
VC Fund
4 United States, United Kingdom, Canada Seed, Series A, Series B Software, Artificial Intelligence, Machine Learning $1M–$130M
Horizons Ventures
VC Fund
4 United States, United Kingdom, Canada Series A, Series B, Seed Software, Artificial Intelligence, Biotechnology $1M–$110M
Austin Ventures
VC Fund
4 United States, China, Japan Series B, Series A, Series C Software, Enterprise Software, Internet $1.6M–$30M
NY Green Bank
VC Fund
4 United States, Canada Debt Financing, Post-IPO Debt Energy, Renewable Energy, Clean Energy $1.1M–$275M
Chrysalix Venture Capital
VC Fund
4 United States, Canada, The Netherlands Series B, Series A Energy, Manufacturing, CleanTech $2M–$24M
Congruent Ventures
VC Fund
4 United States, Canada, United Kingdom Seed, Series A, Series B Software, Energy, Sustainability $2.1M–$90M
Summa Equity
VC Fund
4 Norway, United States, Sweden Venture - Series Unknown, Series C, Private Equity Energy, Software, Information Technology $1.5M–$150M
Climate Capital
VC Fund
4 United States, Germany, Canada Seed, Pre-Seed, Series A Energy, Manufacturing, Renewable Energy $800k–$31M
SYSTEMIQ
VC Fund
4 United States, United Kingdom Series A, Series B, Seed Artificial Intelligence, Energy, Software $412k–$34M
Hess Corporation
VC Fund
4 United States Series A Energy, CleanTech, GreenTech $3M–$11M
Acequia Capital (AceCap)
VC Fund
4 United States, United Kingdom, France Seed, Series A, Pre-Seed Software, Artificial Intelligence, Information Technology $500k–$25M
Keiretsu Capital
VC Fund
4 United States, Canada, India Series A, Convertible Note, Seed Health Care, Biotechnology, Software $50k–$12M
Blue Bear Capital
VC Fund
4 United States, Germany, The Netherlands Series A, Seed, Series B Software, Artificial Intelligence, Information Technology $1.5M–$34M
Countdown Capital
VC Fund
4 United States Seed, Pre-Seed Aerospace, Artificial Intelligence, Manufacturing $1.5M–$12M
Starlight Ventures
VC Fund
4 United States, Finland, Italy Seed, Series A, Convertible Note Biotechnology, Energy, Health Care $110k–$100M
Asymmetry Ventures
VC Fund
4 United States, India, Canada Seed, Pre-Seed, Series A Software, Health Care, Biotechnology $125k–$21M
Braemar Energy Ventures
VC Fund
4 United States, Canada, France Series B, Series C, Series A Energy, Manufacturing, Renewable Energy $1.2M–$45M
Ardent Venture Partners
VC Fund
3 United States, India Series A, Seed, Series B FinTech, Financial Services, Software $2.5M–$50M
Access all 1858 investors in United States Clean Energy startups.

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822 industries, 177 countries. Updated daily. Emails and phones included.

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Investor list

Breakthrough Energy Ventures
VC Fund · Paris, Ile-de-France, France · 12 investments in United States Clean Energy startups, 16 in the past 12 months

Empowering innovators to build the future of energy

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Investment focus

  • Industry: Energy, Renewable Energy, Manufacturing
  • Stage:Series A, Series B, Seed
  • Geography: United States, Canada, United Kingdom

Investor stats

  • Total investments: 290
  • Round size: Seed $2M–$19M; Series A $11M–$55M; Series B $20M–$195M
  • Lead/follow: 47% lead, 53% follow
  • Last fund: Likely actively investing — fresh fund, raised $145M in 2025

Portfolio highlights

  • Arkea Bio — ArkeaBio is using innovative vaccine technologies to create solutions to reduce the on-farm methane emissions responsible for 6% of global GHG emissions.
  • Type One Energy — Type One Energy is a fusion power system developer whose goal is to provide clean fusion power to cities. Through innovations in high-temp superconducting magnets and additive manufacturing, the company's system connects the compact, cost-effective stellarator fusion power plant to the grid, allowing people to access power when it is needed.
  • Prolific Machines — Difficult protein production made simple. A next-generation expression system for next-generation therapeutics.
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Alumni Ventures
VC Fund · Manchester, New Hampshire, United States · 11 investments in United States Clean Energy startups

Access curated startup investment opportunities and diversified venture capital exposure designed for accredited investors.

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Investment focus

  • Industry: Software, Artificial Intelligence, Health Care
  • Stage:Seed, Series A, Series B
  • Geography: United States, United Kingdom, Canada

Investor stats

  • Total investments: 2705
  • Round size: Seed $850k–$9.9M; Series A $3.5M–$32M; Series B $8M–$75M
  • Lead/follow: 4% lead, 96% follow
  • Last fund: Likely actively investing — fresh fund, raised $90k in 2026

Portfolio highlights

  • NextDroid — NextDroid - We're Doing Something Different
  • Hello Patient — Healthcare AI that gets your team off the phone & in front of patients
  • Alva Energy — Alva Energy is a nuclear solution based firm that aids challenges related to nuclear power offering on time delivery of nuclear megawatts.
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Third Sphere
VC Fund · Brooklyn, New York, United States · 10 investments in United States Clean Energy startups

Third Sphere is Pre-Seed and Seed stage fund focused on rapid, scalable climate action and targeting outsized impact and outsized returns. Fund strategy: Climate action - Track record of over 100 portfolio companies that unlock GHG reduction and resilience via strategies like electrification that don’t ask for premiums, just better products and services such as Cove Tool (building design), OneWheel (consumer EV), and Gradient (home hvac). First-in Capital - focus on ownership in pre-seed/seed stage teams and markets where we can help unlock institutional funding and multiple opportunities to expand ownership before Series A. Earned access - GPs (Shaun, Stonly, and Shilpi) have 9 years together with public reputation and ranks including; top 1% of investors on NFX for climatetech; #1 ranked early stage fund by Climate 50; named in the top 10 of VCs who founders love the most by Techcrunch Repeatable differentiation - Proprietary curated network with over 12k people, enabling 1k annual 1:1 introductions, along with access to asset finance.

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Investment focus

  • Industry: Software, Energy, Real Estate
  • Stage:Seed, Pre-Seed, Convertible Note
  • Geography: United States, United Kingdom, Israel

Investor stats

  • Total investments: 209
  • Round size: Seed $100k–$7.5M; Pre-Seed $150k–$3M; Convertible Note $125k–$1.2M
  • Lead/follow: 9% lead, 91% follow
  • Last fund: Likely still investing — raised $9.9M in 2022

Portfolio highlights

  • Forest3 AI — Forest3 multiplies forest management productivity with small, semi-autonomous equipment for fire prevention and precision harvesting. Forest professionals are empowered to get more coverage in less time with much greater safety.
  • Shellworks — Reimaging nature's packaging with beautifully sustainable, truly compostable alternatives to plastic for cosmetics and beauty products.
  • Merino Energy — Electric cooling and heating installed in an hour or less.
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Clean Energy Venture Group
VC Fund · Brookline, Massachusetts, United States · 10 investments in United States Clean Energy startups

CEVG is an angel investor collective that invest in and mentors early-stage cleantech and climatetech startups across North America.

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Investment focus

  • Industry: Energy, Renewable Energy, Manufacturing
  • Stage:Seed, Series A, Convertible Note
  • Geography: United States, Canada

Investor stats

  • Total investments: 74
  • Round size: Seed $1M–$5.6M; Series A $2M–$11M; Convertible Note $630k–$2.5M
  • Lead/follow: 8% lead, 92% follow
  • Last fund: May invest from a new fund soon — raised $108M in 2019

Portfolio highlights

  • PeelON — At PeelON, we're passionate about freshness, sustainability, and innovation. Our mission is to revolutionize the packaging industry by offering biodegradable solutions that keep produce fresher for longer while minimizing environmental impact. With PeelON, you can trust that your fruits and vegetables stay crisp, delicious, and planet-friendly. Join us in our journey towards a fresher, greener future. - Biodegradable covers - food packaging - biodegradable food packing - fresh fruit covers
  • Queens Carbon — Queens Carbon is working on a processing system that will dramatically cut energy use. The system minimizes calcination and material synthesis energy consumption, allowing for low-cost carbon capture and carbon-neutral cement manufacture.
  • Electrified Thermal Solutions — Electrified Thermal Solutions, Inc. is developing the Joule Hive: a new energy storage technology that converts surplus zero-carbon electricity into heat.
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Lowercarbon Capital
VC Fund · New York, New York, United States · 10 investments in United States Clean Energy startups, 26 in the past 12 months

Lowercarbon Capital backs kickass companies slashing CO2 emissions, sucking carbon out of the sky, and buying us time to unf**k the planet.

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Investment focus

  • Industry: Renewable Energy, Energy, Manufacturing
  • Stage:Series A, Seed, Series B
  • Geography: United States, United Kingdom, France

Investor stats

  • Total investments: 229
  • Round size: Seed $3M–$12M; Series A $11M–$50M; Series B $21M–$150M
  • Lead/follow: 39% lead, 61% follow
  • Last fund: Likely actively investing — fresh fund, raised $11M in 2025

Portfolio highlights

  • Stand — Full homeowners insurance priced for your home, not your ZIP code. Make it safer and your premium drops. Concierge protection and coverage for high-value homes in California and Florida.
  • Type One Energy — Type One Energy is a fusion power system developer whose goal is to provide clean fusion power to cities. Through innovations in high-temp superconducting magnets and additive manufacturing, the company's system connects the compact, cost-effective stellarator fusion power plant to the grid, allowing people to access power when it is needed.
  • Rainmaker Technology — Rainmaker uses drone-based cloud seeding to increase rainfall, restore ecosystems, and fight drought. Learn how our scalable weather technology brings water to the West.
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Everywhere Ventures
VC Fund · New York, New York, United States · 9 investments in United States Clean Energy startups

Everywhere Ventures is a global pre-seed venture capital fund for founders, by founders. Click to read Everywhere VC, by Everywhere Ventures, a Substack publication with tens of thousands of subscribers.

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Investment focus

  • Industry: Software, Health Care, Artificial Intelligence
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, United Kingdom, Australia

Investor stats

  • Total investments: 1305
  • Round size: Seed $1M–$6.5M; Pre-Seed $250k–$2.5M; Series A $6M–$20M
  • Lead/follow: 2% lead, 98% follow
  • Last fund: Likely actively investing — fresh fund, raised $4.4M in 2026

Portfolio highlights

  • Donna — Meet Donna, the AI assistant built for field sales teams. Save time, cut admin, and close more deals with less effort.
  • Noise — Noise makes finding UGC creators easy. Work smarter with personalized AI guidance to make your next UGC creator campaign go viral.
  • Netsec — Professional cybersecurity and managed IT services to protect your business 24/7.
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Energy Impact Partners
VC Fund · New York, New York, United States · 9 investments in United States Clean Energy startups, 20 in the past 12 months

Energy Impact Partners LP (EIP) is a global venture capital firm leading the transition to a sustainable future. EIP brings together entrepreneurs and the world's most forward-looking energy and industrial companies to advance innovation. With over $2.5 billion in assets under management, EIP invests globally across venture, growth, credit, and infrastructure.

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Investment focus

  • Industry: Software, Energy, Renewable Energy
  • Stage:Series A, Series B, Series C
  • Geography: United States, Canada, United Kingdom

Investor stats

  • Total investments: 218
  • Round size: Series A $8.8M–$33M; Series B $15M–$111M; Series C $23M–$110M
  • Lead/follow: 51% lead, 49% follow
  • Last fund: Likely actively investing — fresh fund, raised $1.4B in 2025

Portfolio highlights

  • Reverion — Reverion develops reversible and carbon-negative power plants using patented biogas technology for renewable energy.
  • CivilGrid — CivilGrid centralizes verified utility, environmental, and geotechnical data on one collaborative map so teams design faster, safer, and at lower cost.
  • Reframe Systems — Robotic microfactories for building net-zero homes 2x faster, 2x cheaper with 10x lower carbon
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Khosla Ventures
VC Fund · Menlo Park, California, United States · 9 investments in United States Clean Energy startups

Khosla Ventures is a venture capital firm that invests in early- to late-stage companies across sectors like AI, healthcare, sustainability, and consumer technology. It manages multiple funds, focusing on startups with innovative technologies or business models. The firm primarily targets sectors like AI, climate tech, digital health, and medtech, offering strategic support to help build long-lasting companies.

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Investment focus

  • Industry: Artificial Intelligence, Software, Health Care
  • Stage:Series A, Seed, Series B
  • Geography: United States, United Kingdom, India

Investor stats

  • Total investments: 1508
  • Round size: Seed $1.8M–$23M; Series A $5.5M–$47M; Series B $11M–$100M
  • Lead/follow: 39% lead, 61% follow
  • Last fund: Likely actively investing — fresh fund, raised $31M in 2026

Portfolio highlights

  • Anrok — Anrok automates sales tax compliance across your financial stack, so you can grow your SaaS business in any market.
  • Vectra AI — Vectra AI delivers AI-native security and observability across network, identity, cloud, SaaS, and AI environments to reduce exposure, accelerate response, and strengthen cyber resilience.
  • C the Signs — Discover C the Signs: a cutting-edge cancer prediction system enhancing early detection and survival. Committed to reducing healthcare disparities.
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Collaborative Fund
VC Fund · New York, New York, United States · 8 investments in United States Clean Energy startups

Collaborative Fund is a leading source of capital for entrepreneurs pushing the world forward.

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Investment focus

  • Industry: Software, Food and Beverage, Artificial Intelligence
  • Stage:Seed, Series A, Series B
  • Geography: United States, United Kingdom, South Korea

Investor stats

  • Total investments: 402
  • Round size: Seed $1.2M–$10M; Series A $4.7M–$31M; Series B $15M–$75M
  • Lead/follow: 17% lead, 83% follow
  • Last fund: Likely actively investing — fresh fund, raised $15M in 2026

Portfolio highlights

  • Switchboard — Switchboard's service design, coaching, and software offerings generate real results for higher ed teams and institutions.
  • Parallel Systems — Parallel Systems designs an autonomous, zero-emissions freight transportation system. The company believes the future of freight transportation should be fast, inexpensive, and clean, while also reducing congestion on the highways. Parallel Systems was founded in 2020 and is headquartered in Los Angeles, California.
  • A Vinyl Bar in Shibuya — a vinyl bar in shibuya | we build products that let humans play with music
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Wonder Ventures
VC Fund · Santa Monica, California, United States · 7 investments in United States Clean Energy startups

Wonder Ventures invests in entrepreneurs who have great ideas. Who build the world’s most innovative technology companies in order to address the world’s toughest challenges. Who think of long-term solutions that span generations.We are based in Santa Monica, CA. We actively invest in Los Angeles, New York City, Silicon Valley, Washington D.C.and anywhere great teams are located.

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Investment focus

  • Industry: Software, Internet, Health Care
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States

Investor stats

  • Total investments: 93
  • Round size: Seed $1.3M–$7M; Pre-Seed $620k–$2.7M; Series A $8M–$46M
  • Lead/follow: 19% lead, 81% follow
  • Last fund: Likely still investing — raised $44M in 2022

Portfolio highlights

  • Ownwell — Ownwell combines technology and local expertise to help real estate owners save money on property taxes.
  • Mogul — Your path to financial success in the music business.
  • The Biological Computing — Biological Black Box integrates biological neurons with artificial neural networks to develop a living computer.
Show all investments...

Access 48,091 investors

822 industries, 177 countries. Updated daily. Emails and phones included.

Browse database — It's Free!
Powerhouse Ventures
VC Fund · Oakland, California, United States · 7 investments in United States Clean Energy startups

Powerhouse Ventures backs entrepreneurs building the digital infrastructure for rapid decarbonization.

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Investment focus

  • Industry: Software, Energy, Solar
  • Stage:Seed, Series A, Pre-Seed
  • Geography: United States, India, Canada

Investor stats

  • Total investments: 81
  • Round size: Seed $1.1M–$5M; Pre-Seed $1.1M–$1.5M; Series A $3.3M–$30M
  • Lead/follow: 14% lead, 86% follow
  • Last fund: Likely still investing — raised $70M in 2022

Portfolio highlights

  • CVector — Stream, model, and act on your energy and industrial data in real time. CVector unifies asset and market data so you can make faster, smarter project decisions.
  • ThinkLabs AI — Physics-informed AI agents delivering continuous automation for grid planning and operations.
  • TrustBridge.GG — The premier platform for competitive PlayStation gaming with secure escrow-based competitive gaming. Put your gaming skills to the test and earn real money on the most secure PlayStation competitive gaming platform.
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AP Ventures
VC Fund · London, England, United Kingdom · 6 investments in United States Clean Energy startups

AP Ventures invests in pioneering technologies and businesses that harness the unique chemical and physical properties of Platinum Group Metals to solve global challenges. AP Ventures is led by a specialist investment team with proven expertise and a successful track record. We offer investors access to high growth technologies that are developing solutions to solve global issues.

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Investment focus

  • Industry: Energy, Renewable Energy, Manufacturing
  • Stage:Series A, Seed, Series B
  • Geography: United States, United Kingdom, France

Investor stats

  • Total investments: 51
  • Round size: Seed $3.1M–$8.2M; Series A $5M–$23M; Series B $4.2M–$139M
  • Lead/follow: 39% lead, 61% follow
  • Last fund: Likely actively investing — fresh fund, raised $195M in 2025

Portfolio highlights

  • Ravel — Ravel revolutionizes textile recycling through purification technology, effectively separating and repurposing blended materials. Join us in shaping a circular textile economy.
  • Immaterial — Facilitating the energy transition with advanced materials.
  • Cambridge Electric Cement — Cambridge Electric Cement is a sustainable cement start-up. Its breakthrough process co-recycles steel and cement to produce a low carbon, circular cement product that offers very low emissions[1], circular, and scalable alternative to existing cement production.
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Massachusetts Clean Energy Center
VC Fund · Boston, Massachusetts, United States · 6 investments in United States Clean Energy startups

The Massachusetts Clean Energy Center (MassCEC) is dedicated to accelerating the success of clean energy development and implementation—while creating high-quality jobs and long-term economic growth in Massachusetts. MassCEC is the first state agency in the nation dedicated solely to facilitating the development of the clean energy industry. We areled by people who bring knowledge, experience and an entrepreneurial attitude to help clean energy companies take full advantage of all the state’s unique assets, to help accelerate the development of renewable energy generation projects, and to help develop a workforce that is ready to roll up its sleeves to ensure Massachusetts’ place as a national and global clean energy hub.

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Investment focus

  • Industry: Energy, Renewable Energy, Manufacturing
  • Stage:Grant, Seed, Series A
  • Geography: United States, United Kingdom, Italy

Investor stats

  • Total investments: 293
  • Round size: Seed $1.7M–$10M; Grant $50k–$400k; Series A $1.2M–$10M
  • Lead/follow: 80% lead, 20% follow

Portfolio highlights

  • HKG Energy — HKG Energy is a material science and nanotechnology company founded by a team of Harvard scientists and battery industry veterans. Our proprietary Terra Silicon solutions increase energy density by 80% and reduce costs by 40% in lithium-ion, sodium-ion, and solid-state battery cells for the power tools, consumer electronics, robotics, electricvehicle, and aviation industries.Connect with us at contact@hkgenergy.com to learn more and discuss your battery development requirements.
  • Teragen Energy — Teragen Energy develops an energy technology platform based on advanced regenerative solid oxide fuel cells that provide both power generation and energy storage in a single system. The company’s systems generate electricity from external fuels such as natural gas or hydrogen without combustion and can operate in reverse to store power as hydrogen.Teragen designs modular systems that can be scaled from megawatt-scale installations for data centers to deployments for microgrids, renewable projects, and utilities. Its technology is intended to help operators manage variable renewable output, ride through outages, and address daily capacity needs using one device. Teragen focuses on applications including AI and cloud data centers, manufacturing and cold storage facilities, remote communities, and electric grid infrastructure. The platform is positioned to replace separate diesel generators and battery systems by combining fuel-flexible generation and low-cost storage in a compact footprint.
  • Worcester Polytechnic Institute — WPI has a lot to offer - extraordinary students, world-renowned faculty members at the top of their fields, state-of-the-art research facilities, and a community teeming with activity. You have a lot to offer too - you're ambitious, you want to be challenged, you want to succeed, and you want to make a difference in the world. You know whereyou want to go; WPI can help you get there.
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Safar Partners
VC Fund · Cambridge, Massachusetts, United States · 6 investments in United States Clean Energy startups, 12 in the past 12 months

Safar Partners is a seed- to growth-stage venture fund investing primarily in technology companies out of MIT, Harvard, and the University of Rochester. We invest in platform technologies in the cleantech and advanced materials, AI/IT and robotics, and life science/medical device areas.

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Investment focus

  • Industry: Biotechnology, Health Care, Information Technology
  • Stage:Seed, Series A, Series B
  • Geography: United States, China, Italy

Investor stats

  • Total investments: 96
  • Round size: Seed $1.5M–$17M; Series A $11M–$40M; Series B $7M–$863M
  • Lead/follow: 20% lead, 80% follow
  • Last fund: Likely actively investing — fresh fund, raised $12M in 2026

Portfolio highlights

  • Quintessent — Quintessent is developing optical connectivity solutions to scale computing and Artificial Intelligence (A.I.).
  • Soufflé Therapeutics — Soufflé Therapeutics is a biotechnology company specializing in the development of nucleic acid medicines designed for precise delivery and targeting of disease-causing cells. The company's mission is to create potent, precise, and safe medicines that can be tailored for a broad range of diseases by leveraging breakthroughs in genetic medicineand drug delivery technology.
  • Blaze Energy Technologies — Fuel-Flexibility for Maritime Shipping - First Deployment in 2027
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Jericho Energy Ventures
VC Fund · Vancouver, British Columbia, Canada · 6 investments in United States Clean Energy startups

Jericho Energy Ventures invests in hydrogen technologies, energy storage, carbon capture, and new energy systems. Their Investments in Low Carbon energy sources, technologies, and applications will aid in the transition away from fossil sources creating a more sustainable future.

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Investment focus

  • Industry: Energy, CleanTech, GreenTech
  • Stage:Series A, Corporate Round
  • Geography: United States

Investor stats

  • Total investments: 7
  • Round size: Series A $3M–$11M
  • Lead/follow: 71% lead, 29% follow

Portfolio highlights

  • Calicat — H2UTechnologies -Co-founded by Motus Ventures and H2U Chief Scientific Advisor, Dr Nathan Lewis-George L. Argyros Professor of Chemistry at the California Institute of Technology and founding Director and Scientific Director of JCAP (Joint Center for Artificial Photosynthesis)/Cal Tech...clean energy
  • Oklahoma AI Ventures — Oklahoma AI Ventures operates as a special-purpose asset development vehicle designed to secure, assemble, and prepare commercial land sites for infrastructure scaling. Its core business model centers on pairing institutional real estate development with zero-emission hydrogen energy technologies to support power-intensive computing facilities. Theprimary value proposition is delivering dedicated, sustainable, and grid-independent power generation assets tailored to satisfy the extreme electricity demands of high-density artificial intelligence cluster operations.
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Prelude Ventures
VC Fund · San Francisco, California, United States · 6 investments in United States Clean Energy startups, 10 in the past 12 months

Prelude Ventures invests in and supports early-stage startups with the greatest potential to mitigate climate change. For us, climate is everything.

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Investment focus

  • Industry: Software, Energy, Renewable Energy
  • Stage:Series A, Series B, Seed
  • Geography: United States, Canada

Investor stats

  • Total investments: 186
  • Round size: Seed $2.5M–$10M; Series A $6.5M–$32M; Series B $9.3M–$101M
  • Lead/follow: 30% lead, 70% follow
  • Last fund: May invest from a new fund soon — last raise in 2013

Portfolio highlights

  • Quaise Energy — Quaise is an energy company unlocking geothermal energy for the world population through millimeter wave drilling technology.
  • Form Energy — Form Energy is an American company driving innovation in energy manufacturing and technology to ensure a clean, secure, and reliable electric grid.
  • Branch Energy — A tech-powered, green energy provider focused on helping consumers reduce their energy bills and carbon footprints
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Good Growth Capital
VC Fund · Charleston, South Carolina, United States · 6 investments in United States Clean Energy startups

Good Growth Capital is an early-stage venture capital firm known for its expertise in finding, assessing and cultivating complex science and technology.

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Investment focus

  • Industry: Health Care, Biotechnology, Software
  • Stage:Seed, Series A, Convertible Note
  • Geography: United States, France, Israel

Investor stats

  • Total investments: 130
  • Round size: Seed $505k–$8.2M; Series A $4.2M–$24M; Convertible Note $25k–$300k
  • Lead/follow: 35% lead, 65% follow
  • Last fund: Likely still investing — raised $43M in 2023

Portfolio highlights

  • Ateios — Ateios is enabling a new generation of thin and flexible electronics with our ultra-thin, conformable, and customizable batteries. The company's current focus is zinc-oxide batteries, that achieve 2-5x higher energy density compared to coin cells. Ateios’ novel manufacturing process allows customizable batteries that can be shaped around theneeds of the product.The company was founded in 2018.
  • Obsidio — Obsidio™ Conformable Embolic with aqueous gel technology is a 510(k) cleared device, the first of its kind to have a specific on-label indication for peripheral use in the U.S.
  • Avisi Technologies — Avisi Technologies is developing a nanotechnology-enabled defense against blindness from glaucoma.
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Shell Ventures
VC Fund · Rijswijk, Zuid-Holland, The Netherlands · 5 investments in United States Clean Energy startups

Shell Ventures invests in companies to speed up development and deployment of new technologies which complement our business.

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Investment focus

  • Industry: Energy, Renewable Energy, Software
  • Stage:Series A, Series B, Venture - Series Unknown
  • Geography: United States, United Kingdom, India

Investor stats

  • Total investments: 176
  • Round size: Series A $6M–$31M; Series B $2.8M–$126M; Venture - Series Unknown $3M–$32M
  • Lead/follow: 36% lead, 64% follow

Portfolio highlights

  • Mazama — Superhot rock geothermal, proven at 629 degrees F, with the potential to deliver gigawatt-scale, always-on power, anywhere.
  • Asperitas — Asperitas is a clean-tech company focused on greening the datacentre industry by introducing Immersed Computing. Since 2014 Asperitas has worked on validating and developing Immersed Computing® as a unique approach to the datacentre industry. Building on existing liquid immersion cooling technologies by adding integration of power and networkcomponents, improving cooling physics with a strong focus on design and engineering for usability, Asperitas has come up with a complete and integrated solution which can be effectively utilised in most, if not all situations.
  • Bumper — Split the cost of your car repairs and servicing into manageable monthly instalments with 0% interest. Fix it. Split it. Sorted.
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Foothill Ventures
VC Fund · Los Altos, California, United States · 5 investments in United States Clean Energy startups

Foothill Ventures is a technology-focused venture fund that invests in seed-to-A-round startups in the United States. It is a successor fund to the TEEC Angel Fund. Foothill Ventures was founded in 2017 and is headquartered in Los Altos, California.

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Investment focus

  • Industry: Artificial Intelligence, Software, Biotechnology
  • Stage:Seed, Series A
  • Geography: United States, China, Canada

Investor stats

  • Total investments: 117
  • Round size: Seed $1.5M–$12M; Series A $7.5M–$35M
  • Lead/follow: 18% lead, 82% follow
  • Last fund: May invest from a new fund soon — raised $100M in 2021

Portfolio highlights

  • Nervonik — Explore Nervonik neuromodulation devices that are working to redefine peripheral nerve stimulation with advanced technology for high motion.
  • Hyperlight — HyperLight unleashes the potential of integrated photonics by developing a proprietary platform based on thin-film lithium niobate (TFLN)
  • South 8 Technologies — South 8's LiGas cells are engineered to deliver unmatched performance and safety in the most demanding environments.
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The Engine
VC Fund · Cambridge, Massachusetts, United States · 5 investments in United States Clean Energy startups

A home for Tough Tech founders.

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Investment focus

  • Industry: Biotechnology, Health Care, Software
  • Stage:Seed, Series A, Series B
  • Geography: United States

Investor stats

  • Total investments: 79
  • Round size: Seed $2M–$11M; Series A $7.5M–$80M; Series B $16M–$150M
  • Lead/follow: 37% lead, 63% follow

Portfolio highlights

  • VEIR — Discover VEIR's cutting-edge technology for superconducting power lines that offer 5-10x greater transfer capacity and 90% less resistive line losses.
  • Osmoses — Osmoses is a cleantech company that is transforming chemical separations. Its mission is to eliminate energy waste with efficient membrane technology, reducing production costs for customers and CO2 emissions for the environment. Hydrogen, carbon capture, and renewable natural gas are some of the in
  • BlueShift — BlueShift operates as an electrochemical climate tech innovator. BlueShift unlocks underutilized resources with advanced electrochemical technology.
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Clean Energy Ventures
VC Fund · Boston, Massachusetts, United States · 5 investments in United States Clean Energy startups

Clean Energy Ventures backs founders turning breakthrough climate innovations into scaling companies, with decades of engineering and commercial expertise at seed and Series A.

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Investment focus

  • Industry: Manufacturing, Energy, Renewable Energy
  • Stage:Seed, Series A, Series B
  • Geography: United States, Canada, Israel

Investor stats

  • Total investments: 75
  • Round size: Seed $1.5M–$10M; Series A $2.5M–$28M; Series B $7.3M–$33M
  • Lead/follow: 68% lead, 32% follow
  • Last fund: Likely still investing — raised $305M in 2024

Portfolio highlights

  • DG Matrix — DG Matrix innovative solutions unlock gigaton-scale emissions reductions by enabling electrification anywhere and everywhere with less material and a smaller footprint.
  • Branch Energy — A tech-powered, green energy provider focused on helping consumers reduce their energy bills and carbon footprints
  • Hertha Metals — At Hertha Metals, we are developing advanced steel solutions to accelerate the growth and global competitiveness of the U.S. steel industry.
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BoxGroup
VC Fund · New York, New York, United States · 5 investments in United States Clean Energy startups

BoxGroup is an early stage investment fund focused on technology companies. Contact Us: hello@boxgroup.com

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Investment focus

  • Industry: Software, Artificial Intelligence, Information Technology
  • Stage:Seed, Series A, Series B
  • Geography: United States, United Kingdom, Canada

Investor stats

  • Total investments: 856
  • Round size: Seed $1.6M–$9.5M; Series A $5.5M–$32M; Series B $19M–$100M
  • Lead/follow: 5% lead, 95% follow
  • Last fund: Likely actively investing — fresh fund, raised $275M in 2025

Portfolio highlights

  • Fragment — Fragment is the financial system for agents. Programmable money that bills, pays, and accounts for itself.
  • Scuba — Scuba is an AI-powered shared context engine and productivity platform built to serve as a unified "shared memory" for teams and their digital AI agents.
  • Funnel — Our revolutionary CRM property management software saves both time and money for agents and owners while making leasing more efficient.
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Crosscut Ventures
VC Fund · Los Angeles, California, United States · 5 investments in United States Clean Energy startups

Crosscut is a venture capital firm in Los Angeles. We partner with early-stage founders to build extraordinary technology companies from Seed to Series A.

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Investment focus

  • Industry: Software, Information Technology, Internet
  • Stage:Seed, Series A, Pre-Seed
  • Geography: United States, Colombia

Investor stats

  • Total investments: 186
  • Round size: Seed $1.5M–$6.1M; Pre-Seed $1M–$2.3M; Series A $2.2M–$25M
  • Lead/follow: 25% lead, 75% follow
  • Last fund: Likely actively investing — fresh fund, raised $2.6M in 2025

Portfolio highlights

  • SoloPulse — SoloPulse is changing how the world sees by bringing a new approach to sensing and communication technologies that is based on proprietary mathematical wave theory algorithms. This approach unlocks barriers that legacy technologies face while also improving computational efficiency and resolution. SoloPulse’s advanced sensing and beamformingtechniques can use a single electromagnetic pulse to produce high-resolution imaging and increased data transmission rates.
  • Solestial — For new space projects that need 100X more power @ 1/10 the price vs. incumbent III-V technology. Regher develops radiation-hardened silicon solar technology to make power in space affordable.There is a demand for 100 MW of solar for space in the next 5 years. But the existing space solar panels are extremely expensive and very slow tomanufacture. With today's technology 100 MW of space solar panels will cost more than $60B and it will take more than 10 years to manufacture. Regher Solar solves this problem. Regher Solar is revolutionizing the access to power in space with space tolerant ultrathin silicon solar panels, which for the first time on the market, will have both high efficiency and low cost in a single light-weight and flexible package.
  • Proteus Space — Pioneering Automated Satellite Design for Rapid, Payload-Tailored Satellite Deployments with a World-Class Space and Advanced Technology Leadership Team
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Climate Pledge Fund
VC Fund · Seattle, Washington, United States · 5 investments in United States Clean Energy startups

In June 2020, Amazon announced The Climate Pledge Fund to support the development of sustainable and decarbonizing technologies and services that will enable Amazon and other companies to meet the goals set by The Climate Pledge. This dedicated investment program—with an initial $2 billion in funding—will invest in visionary companies whoseproducts and solutions will facilitate the transition to a low-carbon economy.

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Investment focus

  • Industry: Energy, CleanTech, Manufacturing
  • Stage:Series A, Series B, Seed
  • Geography: United States, Canada, India

Investor stats

  • Total investments: 59
  • Round size: Seed $2M–$5M; Series A $11M–$80M; Series B $21M–$246M
  • Lead/follow: 29% lead, 71% follow

Portfolio highlights

  • Mill — Mill is the smartest device in your kitchen. Mill turns would-be food waste into resources for the Earth. Keep filling it for weeks.
  • Moment Energy — Moment Energy empowers commercial and industrial clients across North America to reduce operational costs, increase energy resilience for business, and achieve sustainability goals.
  • Hoofprint Biome — Hoofprint Biome, developing probiotics for to increase feed digestibility and decreasing methane in cattle
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Tamarack Global
VC Fund · New York, New York, United States · 5 investments in United States Clean Energy startups, 6 in the past 12 months

Tamarack Global operates as an investment firm that invests in new markets and new economies. The frim specializes in the fields of finance, financial services, and hedge funds.

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Investment focus

  • Industry: Artificial Intelligence, Information Technology, Internet
  • Stage:Seed, Series A, Series B
  • Geography: United States, Denmark, United Kingdom

Investor stats

  • Total investments: 31
  • Round size: Seed $1.8M–$47M; Series A $10M–$700M; Series B $20M–$675M
  • Lead/follow: 23% lead, 77% follow
  • Last fund: Likely actively investing — fresh fund, raised $6.2M in 2026

Portfolio highlights

  • Rilian Technologies — Rilian develops cybersecurity and defense technology platforms that enable organizations to deploy, integrate, and operate advanced security tools across complex and regulated environments. The company provides an AI-driven security orchestration platform that unifies multiple cybersecurity tools into a single interface, allowing analysts toautomate workflows, monitor threats, and respond to incidents more efficiently. Its offerings include systems for automated deployment and compliance that allow security technologies to operate in air-gapped, sovereign, and highly regulated environments without relying on traditional cloud infrastructure. The company also maintains a curated ecosystem of cybersecurity tools that are pre-integrated and validated for use in mission-critical settings, reducing complexity in adoption and integration.
  • Hark — At Hark, we are building the most advanced personal intelligence in the world.
  • Blue Energy — Factory-built nuclear plants delivered in 3 years at $5k/kW. Blue Energy makes nuclear power financeable and repeatable on a global scale.
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Anzu Partners
VC Fund · Washington, District of Columbia, United States · 5 investments in United States Clean Energy startups

Anzu Partners invests in breakthrough clean tech, industrial, and life science technologies with $1B in assets under management across venture, credit, and public structures.

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Investment focus

  • Industry: Software, Biotechnology, Manufacturing
  • Stage:Series A, Series B, Venture - Series Unknown
  • Geography: United States, Canada, Spain

Investor stats

  • Total investments: 84
  • Round size: Series A $6M–$25M; Series B $5M–$44M; Venture - Series Unknown $7M–$21M
  • Lead/follow: 54% lead, 46% follow
  • Last fund: Likely still investing — raised $100M in 2024

Portfolio highlights

  • 6K — WHERE INDUSTRY 4.0 MEETS SUSTAINABLE PRODUCTION OF BREAKTHROUGH MATERIALS
  • EnCharge AI — AI Compute from the Edge-to-Cloud for Every Business. Transformative technology for AI computation, breaking records in efficiency and sustainability to enable state-of-the-art models uninhibited by power, space, and cost constraints.
  • South 8 Technologies — South 8's LiGas cells are engineered to deliver unmatched performance and safety in the most demanding environments.
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Bolt
VC Fund · San Francisco, California, United States · 5 investments in United States Clean Energy startups

Bolt: Investing at the intersection of the digital and physical worlds

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Investment focus

  • Industry: Software, Health Care, Hardware
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, Canada

Investor stats

  • Total investments: 126
  • Round size: Seed $765k–$5.5M; Pre-Seed $130k–$2.5M; Series A $8M–$15M
  • Lead/follow: 25% lead, 75% follow
  • Last fund: May invest from a new fund soon — raised $70M in 2017

Portfolio highlights

  • FYTO — Revolutionary Sustainable Agriculture
  • Blackbird — We believe the next great hospitality technology platform should connect restaurants and their customers directly, in meaningful and ongoing ways. Blackbird is founded by a team with a passion for restaurants and a track record of using technology to solve problems.
  • Foundation — Foundation Devices builds the open hardware foundation for Bitcoin and the sovereign Internet.They started Foundation Devices to make beautifully designed, open-source hardware for Bitcoin and the decentralized Internet. To bring great design and UX to hardware wallets, nodes, and more. To empower individuals to securely use and store Bitcoinwhile maintaining their sovereignty. To help our industry cross the chasm while staying true to its founding ideals. We call this open hardware. And we are excited to bring it to the world!
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Overture Ventures
VC Fund · Los Angeles, California, United States · 5 investments in United States Clean Energy startups, 8 in the past 12 months

Overture is an early stage climate tech fund at the intersection of government.

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Investment focus

  • Industry: Energy, Renewable Energy, Manufacturing
  • Stage:Seed, Series A, Series B
  • Geography: United States, Canada

Investor stats

  • Total investments: 54
  • Round size: Seed $2M–$25M; Series A $12M–$60M; Series B $6M–$150M
  • Lead/follow: 7% lead, 93% follow
  • Last fund: Likely still investing — raised $60M in 2021

Portfolio highlights

  • Fluxco — One spec in, competitive bids from 150+ global OEMs back in days. Procurement, leasing, service and warranty from one accountable partner.
  • Recheck — Recheck is the verification platform for residential solar salespeople and installers that brings transparency and accountability to the sales process.
  • Atana Elements — Atana is accelerating the exploration and development of flowing critical minerals and industrial gases. Atana uses a proprietary tech stack to identify and mature mineral resources quickly and effectively.
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Backstage Capital
VC Fund · West Hollywood, California, United States · 4 investments in United States Clean Energy startups

Backstage Capital is a venture capital fund investing in the best startups led by underrepresented founders in the U.S. The firm was founded in 2015 by Arlan Hamilton and is headquartered in West Hollywood, California, United States.

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Investment focus

  • Industry: Software, Health Care, Internet
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, United Kingdom, Trinidad and Tobago

Investor stats

  • Total investments: 184
  • Round size: Seed $100k–$3.5M; Pre-Seed $100k–$1.5M; Series A $4M–$20M
  • Lead/follow: 14% lead, 86% follow
  • Last fund: May invest from a new fund soon — raised $2.1M in 2021

Portfolio highlights

  • BoldHue — BoldHue is a beauty tech company that develops a Bluetooth-enabled handheld device to customize beauty needs. Its platform uses AI technology to scan faces, display color, and match the color of the face to dispense pigmentation into the base foundation. BoldHue was founded in 2019 and is headquartered in Aurora, Colorado.
  • AudioMob — Monetizing mobile games non-intrusively using audio ads! AudioMob are the creators of Audio Enhanced Banners & Rewarded Audio
  • CreditRich AI — Official Account for the CreditRich app out now on Google Play!
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Amplify.LA
VC Fund · Venice, California, United States · 4 investments in United States Clean Energy startups

Amplify is a pre-seed fund in Venice, CA dedicated to backing the strongest technical and product-obsessed teams at the earliest stages, supporting from first check to exit. The firm was founded in 2011, and has backed over one hundred companies to-date, which together have raised over half a billion dollars in funding, with exits to Apple, Google, Microsoft, Amazon, and public markets.

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Investment focus

  • Industry: Software, SaaS, Health Care
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, Canada

Investor stats

  • Total investments: 168
  • Round size: Seed $750k–$4M; Pre-Seed $200k–$3.6M; Series A $3.1M–$10M
  • Lead/follow: 26% lead, 74% follow
  • Last fund: Likely still investing — raised $60M in 2024

Portfolio highlights

  • Battlefy — Battlefy is the simplest way to start, manage, and find esports tournaments | Create. Compete. Conquer.
  • Mogul — Your path to financial success in the music business.
  • Overworld — There's a gap between generating an image and inhabiting a reality. We're closing it. Welcome to the Overworld.
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Network.VC
VC Fund · San Francisco, California, United States · 4 investments in United States Clean Energy startups

Venture Funds and Operating System for Independent VC Professionals. Join as a partner and invest in great startups.

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Investment focus

  • Industry: Software, Artificial Intelligence, Information Technology
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, Israel, Ukraine

Investor stats

  • Total investments: 106
  • Round size: Seed $1M–$9M; Pre-Seed $350k–$650k; Series A $6.5M–$22M
  • Lead/follow: 3% lead, 97% follow
  • Last fund: May invest from a new fund soon — last raise in 2019

Portfolio highlights

  • Swarmer — Swarmer is an AI based mission control center for coordinated drones that acts as Firmware for video streaming, logging and monitoring.
  • Peppr AI — Peppr listens to your calls and surfaces the right answer before your customer finishes asking.
  • Afternoon — Afternoon.co empowers founders with real-time financial metrics and automated bookkeeping, reducing administrative tasks for brands.
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New York Ventures
VC Fund · New York, New York, United States · 4 investments in United States Clean Energy startups, 7 in the past 12 months

New York Ventures is dedicated to encouraging innovation and fueling economic growth in communities across the State. This venture capital investment arm of Empire State Development is one of New York State's business resources and innovation investments, including the Governor's START-UP NY program, Innovation Hot Spots, the RegionalEconomic Development Councils, the Centers of Advanced Technology and Centers of Excellence networks, and the SUNY 2020 Initiative.

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Investment focus

  • Industry: Health Care, Biotechnology, Software
  • Stage:Seed, Series A, Series B
  • Geography: United States, Canada, Israel

Investor stats

  • Total investments: 158
  • Round size: Seed $1M–$6.2M; Series A $3M–$20M; Series B $4M–$53M
  • Lead/follow: 5% lead, 95% follow

Portfolio highlights

  • Fathom Therapeutics — The Molecular Frontier
  • CREW Carbon — CREW provides wastewater treatment facilities with a process intensification solution that improves performance, lowers costs, and permanently removes greenhouse gasses.
  • Fesarius Therapeutics — Intelligently Patterned Native-State Hydrogel Wound Dressing for Dermal Tissue Regeneration...
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DCVC
VC Fund · San Francisco, California, United States · 4 investments in United States Clean Energy startups

We are deep tech venture capital.

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Investment focus

  • Industry: Software, Artificial Intelligence, Machine Learning
  • Stage:Seed, Series A, Series B
  • Geography: United States, United Kingdom, Canada

Investor stats

  • Total investments: 518
  • Round size: Seed $1M–$9.1M; Series A $6M–$50M; Series B $15M–$130M
  • Lead/follow: 23% lead, 77% follow
  • Last fund: Likely actively investing — fresh fund, raised $5M in 2026

Portfolio highlights

  • CH4 Global — CH4 Global is an aquaculture solutions provider dedicated to urgently impacting climate change at scale. Lead by a world-class team of senior business builders, scientists and entrepreneurs, the company is initially leveraging proven science and technology for growing seaweed into innovative new livestock supplement that reduces methane produced bycows by up to 90%. Among early investors are a select group of prominent family offices and private investors. CH4 Global have also received non-dilutive capital support from government organizations from around the world. CH4 Global is a Delaware corporation based in Henderson, NV.
  • TypeSafe AI — TypeSafe AI develops artificial intelligence models and software tools designed to support automated decision-making within applications and business workflows. Its primary product, Jev, is a System One Model that processes structured questions and returns typed decisions accompanied by probability scores and confidence estimates. These outputs help software systems perform tasks such as classification, scoring, routing, content evaluation, and customer service operations. TypeSafe AI provides an application programming interface and a web-based console that enable developers and organizations to integrate Jev into their existing systems. Its technology uses a training approach called Reinforcement Learning for Calibrated Decisions, which focuses on producing decisions that software can interpret and apply directly. The platform also supports configurable confidence thresholds, allowing applications to automate actions when confidence meets defined criteria or direct uncertain cases for human review. Through these capabilities, TypeSafe AI focuses on making AI-driven decisions usable in structured, programmatic workflows.
  • Universal Quantum — Universal Quantum is building quantum computers to tackle real-world problems that would take today’s fastest supercomputers billions of years to solve.
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Horizons Ventures
VC Fund · Hong Kong, Hong Kong Island, Hong Kong · 4 investments in United States Clean Energy startups

Investing in the deep science and technology that can propel humanity towards a radically better future.

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Investment focus

  • Industry: Software, Artificial Intelligence, Biotechnology
  • Stage:Series A, Series B, Seed
  • Geography: United States, United Kingdom, Canada

Investor stats

  • Total investments: 347
  • Round size: Seed $1M–$10M; Series A $5.8M–$42M; Series B $10M–$110M
  • Lead/follow: 42% lead, 58% follow

Portfolio highlights

  • HZO — HZO delivers customized protective nano and conformal coatings that safeguard electronics from the most demanding environments. It provides water protection solutions for electronics manufacturers by introducing a durable film to components during assembly. The company specializes in the fields of nanotechnology, waterproofing, electronics,nano-coating, full-submersion.It was founded in 2011 and headquartered in Morrisville, North Carolina.
  • Jobspotting — Jobspotting is a recommendations engine that suggests relevant jobs to users based on their skills and experience. The engine is powered by Skills Graph and Semantic Analysis technology. The company was founded in 2013 in Berlin, Germany by ex-Googlers Hessam Lavi, Jan Backes and Manuel Holtz. Robin Haak joined the founding team in 2014 aftermeeting them through the Axel Springer Plug and Play Accelerator Programme, of which he was a co-founder. Jobspotting successfully acquired seed funding.
  • Atomo Coffee — Atomo Coffee is a developer of molecular coffee. Atomo has reverse-engineered the coffee bean to create a smooth cup of coffee, made of naturally derived ingredients, and more sustainable than current commercial coffee.
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Austin Ventures
VC Fund · Austin, Texas, United States · 4 investments in United States Clean Energy startups

Austin Ventures is a venture capital and private equity company that specializes in partnering with talented executives and entrepreneurs to build companies. It was founded in 1984 and headquartered in Austin, Texas.

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Investment focus

  • Industry: Software, Enterprise Software, Internet
  • Stage:Series B, Series A, Series C
  • Geography: United States, China, Japan

Investor stats

  • Total investments: 252
  • Round size: Series A $1.6M–$12M; Series B $5M–$30M; Series C $6M–$28M
  • Lead/follow: 37% lead, 63% follow
  • Last fund: May invest from a new fund soon — raised $900M in 2008

Portfolio highlights

  • Onit — Onit deploys Onit Apps to simplify business process automation and improve business productivity across all departments and industries. The Onit App Builder allows business users to drive efficiency and productivity by combining business process management, project management, and information management into one easy to use the tool so the usercan create their own Onit Apps without having to rely on IT for support. Businesses have processes for everything -- whether it’s hiring a vendor or law firm, terminating an employee, submitting a contract for review, requesting a trademark request, obtaining an NDA, etc. Most of these processes are manual, paper-intensive, and cumbersome. With Onit Apps, processes are automated in a few clicks, responsible parties are notified immediately, and data collection is centralized. Onit doesn’t require any software to download or resources from IT.
  • Vrbo — Established in 1995, they've been in the vacation rental business for over 14 years. In fact, VRBO was founded by vacation rental owners who self-manage their second homes, like many of you do. They provide an online space for homeowners to advertise their vacation properties and make it easy for travelers to search 140,000+ rentals in over100 countries worldwide.
  • Tasktop — Tasktop offers a software platform that allows companies to better manage the process of building their software. Tasktop plugs into existing tools and overlays the end-to-end value stream to provide the abstractions, automation, visualizations, and forensics needed to practice value stream management on a daily basis.
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NY Green Bank
VC Fund · New York, New York, United States · 4 investments in United States Clean Energy startups

NY Green Bank a division of NYSERDA, is a state-sponsored investment fund established to attract private sector capital and accelerate the deployment of clean energy throughout New York State.

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Investment focus

  • Industry: Energy, Renewable Energy, Clean Energy
  • Stage:Debt Financing, Post-IPO Debt
  • Geography: United States, Canada

Investor stats

  • Total investments: 19
  • Round size: Post-IPO Debt $8M–$25M; Debt Financing $1.1M–$275M
  • Lead/follow: 89% lead, 11% follow

Portfolio highlights

  • NineDot Energy — NineDot Energy develops energy solutions that make the urban grid cleaner, more resilient, and less expensive. Its development priorities include the construction and operation of battery storage facilities in the New York City metropolitan area, including Westchester and Long Island.The company is headquartered in Brooklyn, New York, at the NYUTandon School of Engineering Urban Future Lab.
  • SolarBank — PowerBank (Nasdaq: PBK) develops solar and battery storage to meet rising energy and AI data center power demand across North America.
  • Convergent Energy and Power — Convergent provides battery energy storage and solar-plus-storage solutions to lower energy costs and reduce carbon emissions on behalf of our partners.
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Chrysalix Venture Capital
VC Fund · Vancouver, British Columbia, Canada · 4 investments in United States Clean Energy startups

Leading global venture capital fund that invests in resource intensive industries across North America and Europe.

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Investment focus

  • Industry: Energy, Manufacturing, CleanTech
  • Stage:Series B, Series A
  • Geography: United States, Canada, The Netherlands

Investor stats

  • Total investments: 119
  • Round size: Series A $2M–$14M; Series B $5.4M–$24M
  • Lead/follow: 25% lead, 75% follow
  • Last fund: Likely still investing — fund raised in 2023

Portfolio highlights

  • Luffy AI — Discover Luffy AI's Neuroplastic AI for rapid, adaptive industrial control in robotics, drives, automotive, and more. Enhance system performance and reduce calibration needs. Replace or complement PID loops with Adaptive Control for your Physical AI usecase.
  • Geopyörä Oy — Geopyörä is the state of the art in rock breakage characterization testing and it was developed to allow mining companies to test several samples at low cost for geometallurgical, comminution design and control applications
  • Rithmik Solutions — We increase uptime in mines with advanced analytics that optimize maintenance and extend equipment life.
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Congruent Ventures
VC Fund · Oakland, California, United States · 4 investments in United States Clean Energy startups, 21 in the past 12 months

Congruent Ventures is a leading early-stage venture firm focused on partnering with entrepreneurs to build companies addressing climate and sustainability challenges across four themes: Mobility and Urbanization, the Energy Transition, Food and Agriculture, and Sustainable Production and Consumption. The firm has more than $1 billion in AUM across early-stage climate tech funds, making it one of the largest climate portfolios in early-stage venture. Congruent is amongst the most active investors in the climate and sustainability ecosystem.

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Investment focus

  • Industry: Software, Energy, Sustainability
  • Stage:Seed, Series A, Series B
  • Geography: United States, Canada, United Kingdom

Investor stats

  • Total investments: 162
  • Round size: Seed $2.1M–$11M; Series A $4.6M–$26M; Series B $10M–$90M
  • Lead/follow: 31% lead, 69% follow
  • Last fund: Likely still investing — raised $85M in 2024

Portfolio highlights

  • VEIR — Discover VEIR's cutting-edge technology for superconducting power lines that offer 5-10x greater transfer capacity and 90% less resistive line losses.
  • Parallel Systems — Parallel Systems designs an autonomous, zero-emissions freight transportation system. The company believes the future of freight transportation should be fast, inexpensive, and clean, while also reducing congestion on the highways. Parallel Systems was founded in 2020 and is headquartered in Los Angeles, California.
  • Fluxnium — Fluxnium is a pioneer of domestic uranium supply adsorbed from seawater.
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Summa Equity
VC Fund · Stockholm, Stockholms Lan, Sweden · 4 investments in United States Clean Energy startups

Summa Equity invests in companies that solve global challenges through sustainable growth and positive impact.

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Investment focus

  • Industry: Energy, Software, Information Technology
  • Stage:Venture - Series Unknown, Series C, Private Equity
  • Geography: Norway, United States, Sweden

Investor stats

  • Total investments: 18
  • Round size: Series C $34M–$116M; Venture - Series Unknown $1.5M–$150M
  • Lead/follow: 39% lead, 61% follow
  • Last fund: Likely still investing — raised $594M in 2023

Portfolio highlights

  • EcoOnline — EcoOnline's easy-to-use software system is helping companies to transform their approach to health & safety, chemical safety, and learning data reporting.
  • ZeroAvia — ZeroAvia is producing the world's first practical zero emission aviation powertrain, initially targeting 20-seat airplanes to start replacing dirty jet fuel in regional transport
  • EA Technology — Promoting the development of resilient, accessible, low cost energy networks globally, accelerating the transition to energy decarbonisation.
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Climate Capital
VC Fund · San Francisco, California, United States · 4 investments in United States Clean Energy startups, 6 in the past 12 months

Diversified investments in the most promising early stage climate startups backed by top tier VCs.

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Investment focus

  • Industry: Energy, Manufacturing, Renewable Energy
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, Germany, Canada

Investor stats

  • Total investments: 131
  • Round size: Seed $2M–$9M; Pre-Seed $800k–$2.8M; Series A $9.7M–$31M
  • Lead/follow: 2% lead, 98% follow

Portfolio highlights

  • Revoy — We haul Pacific Northwest freight with our 95% electrified fleet.
  • Ludwig Computing — Ludwig Computing is an AI hardware startup creating energy-efficient compute platforms for future intelligent computing.
  • American Supercritical — American Supercritical manufactures modular supercritical carbon dioxide (sCO₂) power blocks designed to convert heat into electricity. The systems connect to energy infrastructures like gas turbine exhaust stacks, nuclear reactors, reciprocating engine gensets, and heavy industrial factories. They function across a temperature range of 300 to 1000 °C to produce scalable power outputs from 10 to 100+ MW. The factory-assembled blocks utilize dry-cooling by default and operate without requiring site-specific boiler or water chemist staffing.
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SYSTEMIQ
VC Fund · London, England, United Kingdom · 4 investments in United States Clean Energy startups

Systemiq unlocks system change by developing partnerships with leaders in civil society, innovative investors, government, business & finance.

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Investment focus

  • Industry: Artificial Intelligence, Energy, Software
  • Stage:Series A, Series B, Seed
  • Geography: United States, United Kingdom

Investor stats

  • Total investments: 25
  • Round size: Seed $412k–$4.2M; Series A $9.2M–$24M; Series B $15M–$34M
  • Lead/follow: 12% lead, 88% follow
  • Last fund: Likely still investing — raised $70M in 2022

Portfolio highlights

  • InnerPlant — InnerPlant transforms fields into living sensors with biotech, remote sensing, and data science. We enable plants to express stress within hours of emergence.
  • Ren Energy — We create tools that empower organizations to decarbonize their global supply chains.
  • Tangible — Tangible empowers hardware companies with sustainable asset-based lending solutions. Our platform streamlines debt funding, compliance automation, and financial product design, enabling efficient capital mobilization and comprehensive reporting for a greener future. Scale your business with Twist.
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Hess Corporation
VC Fund · New York, New York, United States · 4 investments in United States Clean Energy startups

Hess Corporation is a leading global independent energy company primarily engaged in the exploration and production of crude oil and natural gas. Hess Corporation has developed apps like Hess Jet and Hess Chopper. This company was founded in 1993.

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Investment focus

  • Industry: Energy, CleanTech, GreenTech
  • Stage:Series A
  • Geography: United States

Investor stats

  • Total investments: 4
  • Round size: Series A $3M–$11M
  • Lead/follow: 0% lead, 100% follow

Portfolio highlights

  • Calicat — H2UTechnologies -Co-founded by Motus Ventures and H2U Chief Scientific Advisor, Dr Nathan Lewis-George L. Argyros Professor of Chemistry at the California Institute of Technology and founding Director and Scientific Director of JCAP (Joint Center for Artificial Photosynthesis)/Cal Tech...clean energy
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Acequia Capital (AceCap)
VC Fund · Seattle, Washington, United States · 4 investments in United States Clean Energy startups

We are a leading early-stage investment platform. We are at the center of a global ecosystem that attracts and fuels the technical founders and product teams building the next wave of global businesses.

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Investment focus

  • Industry: Software, Artificial Intelligence, Information Technology
  • Stage:Seed, Series A, Pre-Seed
  • Geography: United States, United Kingdom, France

Investor stats

  • Total investments: 419
  • Round size: Seed $1M–$7.6M; Pre-Seed $500k–$3.3M; Series A $3.3M–$25M
  • Lead/follow: 5% lead, 95% follow
  • Last fund: Likely actively investing — fresh fund, raised $2.9M in 2026

Portfolio highlights

  • Trimagnetix — Pioneering advanced magnetic technologies for medical, industrial, and consumer applications.
  • Devplan — Devplan finds customer demand in calls, tickets and your CRM, writes specs your agents can build, and tracks every project and risk automatically.
  • Applied Atomics, Inc. — Co-located nuclear power plants to unlock the next 1,000 years of advanced industry.
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Keiretsu Capital
VC Fund · Seattle, Washington, United States · 4 investments in United States Clean Energy startups

Keiretsu Capital LLC is an affiliate of the World's Leading Angel Network, Keiretsu Forum, and manages funds which enable limited partners to co-invest in the proprietary deal flow of the angel investors.

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Investment focus

  • Industry: Health Care, Biotechnology, Software
  • Stage:Series A, Convertible Note, Seed
  • Geography: United States, Canada, India

Investor stats

  • Total investments: 287
  • Round size: Seed $400k–$2.5M; Series A $811k–$12M; Convertible Note $50k–$3M
  • Lead/follow: 1% lead, 99% follow
  • Last fund: Likely still investing — raised $3.7M in 2022

Portfolio highlights

  • MiClient — Miclient are deal closure platform which was founded by experienced sales leaders who recognized the need for a new generation of complicated quote configuration, contract signing, renewal & payment collection at one place for SMEs, Lead Management System, B2B SaaS, CRM software, CPQ (Configure- Price- Quote)
  • Healionics — Healionics aims to provide safer, more reliable means of bloodstream access for dialysis in patients with kidney failure.
  • NuvOx Therapeutics — NuvOx Pharma is a clinical stage biotech company developing an innovative platform of oxygen therapeutics to treat life-threatening diseases where hypoxia plays a role.
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Blue Bear Capital
VC Fund · Beverly Hills, California, United States · 4 investments in United States Clean Energy startups

Blue Bear Capital is a venture capital investor supporting companies that apply AI and data-driven technologies to energy infrastructures.

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Investment focus

  • Industry: Software, Artificial Intelligence, Information Technology
  • Stage:Series A, Seed, Series B
  • Geography: United States, Germany, The Netherlands

Investor stats

  • Total investments: 92
  • Round size: Seed $1.5M–$7.3M; Series A $5.3M–$16M; Series B $5.6M–$34M
  • Lead/follow: 39% lead, 61% follow
  • Last fund: Likely actively investing — fresh fund, raised $160M in 2024

Portfolio highlights

  • Korial — Energy Robotics provides an end-to-end solution for autonomous robotic inspection in capital-intensive industries such as oil & gas, chemical and energy.
  • Demex — The Demex Group is a technology company that customizes and delivers climate-resilience through financial risk solutions on a global scale.
  • Lastwall — Lastwall exists to protect democratic institutions by strengthening the cybersecurity posture of defense and critical infrastructure partners.
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Countdown Capital
VC Fund · Columbia, Missouri, United States · 4 investments in United States Clean Energy startups

Investing pre-seed / first checks in founders building hard tech companies.

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Investment focus

  • Industry: Aerospace, Artificial Intelligence, Manufacturing
  • Stage:Seed, Pre-Seed
  • Geography: United States

Investor stats

  • Total investments: 18
  • Round size: Seed $2.3M–$12M; Pre-Seed $1.5M–$3.5M
  • Lead/follow: 11% lead, 89% follow
  • Last fund: Likely still investing — fund raised in 2022

Portfolio highlights

  • Heliux — Heliux centralizes cross-functional teams, operations, and data onto a single platform by replacing your legacy PDM, PLM, ERP, and MES systems.
  • Galvanick — Secure industrial operations. Galvanick's industrial-first Extended Detection & Response (XDR) platform secures industrial systems and networks against cyber attacks.
  • K2 Space — By breaking the historic correlation between mass and cost, the K2 Space satellite bus offers the capabilities of large satellites at the price point of small satellites. A multi-orbit spacecraft for use across commercial, scientific and defense missions.
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Starlight Ventures
VC Fund · Miami, Florida, United States · 4 investments in United States Clean Energy startups

Starlight is a venture capital firm for founders addressing the world’s most pressing challenges & opportunities. We partner early with unstoppable entrepreneurs leveraging breakthrough science and technology to pursue progress at scale in four main areas: the energy transition, industrializing synthetic biology, space technology, and novelcomputing & communications platforms.Starlight was founded in 2017 and is headquartered in Miami, Florida.

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Investment focus

  • Industry: Biotechnology, Energy, Health Care
  • Stage:Seed, Series A, Convertible Note
  • Geography: United States, Finland, Italy

Investor stats

  • Total investments: 65
  • Round size: Seed $674k–$8.4M; Series A $10M–$100M; Convertible Note $110k–$8.8M
  • Lead/follow: 11% lead, 89% follow
  • Last fund: May invest from a new fund soon — raised $50M in 2021

Portfolio highlights

  • Ammobia — Ammobia's advanced reactor technology enables economical ammonia production at any scale. 50% lower CapEx, 10-40% lower costs for fuel, fertilizer, and energy.
  • Thea Energy — Discover Thea Energy, a fusion energy company reinventing the stellarator to create a limitless source of zero emission energy for a sustainable future.
  • Commonwealth Fusion Systems — The fastest path to clean, limitless fusion energy.
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Asymmetry Ventures
VC Fund · San Francisco, California, United States · 4 investments in United States Clean Energy startups

Asymmetry Ventures invests in scalable early-stage companies with exceptional defensibility.

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Investment focus

  • Industry: Software, Health Care, Biotechnology
  • Stage:Seed, Pre-Seed, Series A
  • Geography: United States, India, Canada

Investor stats

  • Total investments: 298
  • Round size: Seed $500k–$5M; Pre-Seed $125k–$2.4M; Series A $2M–$21M
  • Lead/follow: 2% lead, 98% follow

Portfolio highlights

  • Enlightra — Extreme-bandwidth data transmission enabled by light
  • Persist AI — Persist AI develops PLGA microspheres for long-acting injectable formulations 50% faster using automation and AI.
  • Coreshell Technologies — Battery Capacity Unlocked
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Braemar Energy Ventures
VC Fund · New York, New York, United States · 4 investments in United States Clean Energy startups

While energy has been a key to global development since the dawn of the electronic age, the beginning of the new century has seen a tremendous surge in the technology advancements, market activity and the strategic importance of energy around the world. While many companies and investors have sought to take advantage of the tremendous opportunity today's energy industry presents, the unique market issues, scientific contributions and complex web of interrelationships require a specialized expertise. Braemar Energy Ventures was formed in 2002 to create a venture capital firm with that expertise. Focused exclusively on technology and communications opportunities in the energy sector, Braemar Energy Ventures has both the industry and operating knowledge to select promising young companies, bring them into the larger energy world and guide them to reach their full potential. The firm's four principals have a long history of successful investments, as well as experience financing and operating companies in the energy sector. Together, they have been responsible for investing in almost 40 energy technology companies, including early stage companies which have grown to become some of the most successful in the sector. Braemar Energy Ventures works with management teams who are skilled in their industry but who can benefit from Braemar's assistance with strategic direction and financing issues. Having worked with many early stage companies, the Braemar Energy Ventures principals understand the challenges that many young companies face and provide invaluable counsel to their portfolio companies on longer-term issues, allowing management to focus on daily operations.

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Investment focus

  • Industry: Energy, Manufacturing, Renewable Energy
  • Stage:Series B, Series C, Series A
  • Geography: United States, Canada, France

Investor stats

  • Total investments: 115
  • Round size: Series A $1.2M–$13M; Series B $5M–$27M; Series C $7M–$45M
  • Lead/follow: 26% lead, 74% follow
  • Last fund: May invest from a new fund soon — raised $300M in 2012

Portfolio highlights

  • NxLite — 3E Nano has developed and is commercializing a low cost, thermally and optically smart, Diamond-Like Carbon (DLC) coating. This nano thin film applied to glass and other transparent media is targeted toward windows, windshields, greenhouses, and solar module manufacturers.
  • ZincFive — ZincFive is an intelligent energy storage and delivery solutions company providing nickel-zinc battery based UPS solutions for mission-critical applications in data centers, intelligent transportation, motive power, and other industries. With 74 patents awarded and 29 patents pending, ZincFive leverages nickel-zinc chemistry within our solutions toprovide high power density and performance simultaneous with superior safety and environmental advantages. ZincFive was founded in 2016 and is based in Tualatin, Oregon.
  • Utilidata — Utilidata is an AI-powered technology company that provides utilities with robust, real-time insights to operate a connected grid and better serve their customers.
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Ardent Venture Partners
VC Fund · Washington, District of Columbia, United States · 3 investments in United States Clean Energy startups

We invest in exceptional founders building technology that transforms work. Selective. Progressive. All-in. We take partnership seriously. We invest with conviction and high-expectations. We support founders in turning big swings into big companies.

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Investment focus

  • Industry: FinTech, Financial Services, Software
  • Stage:Series A, Seed, Series B
  • Geography: United States, India

Investor stats

  • Total investments: 27
  • Round size: Seed $2.5M–$8.5M; Series A $5.8M–$50M; Series B $20M–$50M
  • Lead/follow: 22% lead, 78% follow
  • Last fund: May invest from a new fund soon — last raise in 2021

Portfolio highlights

  • Palla — Palla is a REST API that lets banks empower their customers to request, receive and manage international inward remittances. Its product is built to allow its partners to fully customize the experience within their app and includes tailored reporting to drive customer insights and engagement.
  • Linecook —
  • Swivel — PilotDesk advances ad operations by automating tedious processes, allowing humans to concentrate on strategy and creativity.
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Clean Energy Investor funding in United States at a glance

Stats across 1.6k deals from 1.9k investors.

1.9k
investors
in United States Clean Energy startups
1.6k
deals
in United States Clean Energy startups
$8.4M
median round
in United States Clean Energy startups
39%
lead investors
lead at least one round
19%
Grant
most common funding stage
89/11
VC / Angel
share of investor count

Access all 1858 investors in United States Clean Energy startups.

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