Top 50 CleanTech Angel Investors in United Kingdom (September 2026)

Portfolio highlights

• Oraion — Your single source of truth for enterprise data
• Wassist — Launch your AI sales agent on WhatsApp for Shopify in under 60 seconds. Recover 30-50% of abandoned carts and increase conversions by 3x.
• Capsa AI — Providing next-generation investors with a competitive edge.

Portfolio highlights

• Yupp — Every AI for everyone
• Subtle Computing — Introducing Voicebuds. A device that hears only you, even at your quietest.
• Vantage Discovery — Vantage Discovery is a generative AI-powered SaaS platform that enables intelligent search, discovery, and personalized recommendations so apps can deliver breathtaking customer experiences.

Portfolio highlights

• Agnikul — Agnikul Cosmos designs and manufactures orbital-class launch vehicles powered by 3D-printed engines. From custom payloads to affordable private launches, we make space access simple, scalable, and mission-focused.
• Log 9 Materials — Log 9 Materials Scientific Private Limited is a graphene research and development company. At Log 9 Materials we are determined to accelerate the commercialization of graphene nanotechnology. We have just developed the first commercial product on graphene- 'Smoke-safe'. This innovative graphene based cigarette filter reduces the risk ofgetting cancer by 90%. We offer a wide range of graphene (CVD graphene, rGO) and its derivatives. We bring to you graphene as researchers and not just manufactures, so we understand the triviality of the grade of our products.
• Toffee Ride - Learning App for Classes I - IV — Developed by a group of IIM, NIT alumni, with the support of academicians and child development experts, Toffee Ride is an app-based learning program that helps your child develop a thorough understanding of fundamental concepts and improve their language skills. Toffee Ride helps to make productive use of your kid's screen time by keepingthem engaged through a wide variety of fun-filled learning activities. Toffee Ride is specifically designed for Classes I-IV and contains more than 800 + lessons and 6000 + activities, which provide comprehensive coverage of English, Maths, EVS, GK, Social Studies, and Life Skills. Our Vision: “Making premium education affordable”The level of personalized attention required during the formative years is lacking in most schools, except for a few premium ones. Moreover, most parents, especially working professionals, often find it difficult to find time to compliment their kids learning in school. A rather serious implication of this is that children whose development lag behind during their early years find it very difficult to catch up in their higher classes. Through Toffee Ride, we attempt to bridge this gap using technology as an enabler to provide the much-needed personal attention in early learning.

Portfolio highlights

• Nova Pangaea Technologies — NPT is a cleantech company that has developed a revolutionary process technology called REFNOVA. REFNOVA allows customers to converts non-food plant residues into sustainable products such as biochar, activated carbon, biofuel, biopolymers and biochemicals. Our products help customers replace fossil based products and enable decarbonisation.

Portfolio highlights

• Desia — Desia provides advanced AI applications for productivity, automation, and analytics for financial services.
• StackOne — Accelerate your SaaS growth with our unified API solution for HRIS, ATS, and CRM. Say "yes" to customers, build advanced integrations quickly, and experienced the best data privacy controls in the market.
• Tranched — Introducing real-time on-chain securitisation. Fintech Lenders and Professional Investors can now launch an institutional-grade transaction up to 90% faster than before.

Portfolio highlights

• Metagood — Metagood is the operating layer for tokenized assets across their full lifecycle: compliance, transfer rules, entitlements, corporate actions, and audit.
• Tem-Energy — Until now, businesses have had to buy power via Big Energy putting up with overpricing, sapping levels of service and glacial innovation. Now with tem. any company can buy Renewable Energy Direct. This allows businesses to save on energy costs whilst renewable generators are rewarded.
• ReBorn® Homewares — ReBorn purpose is to transform the sustainability of the global homewares industry. We are committed to creating the most stylish and planet-friendly homewares, and driving collective change in the UK and beyond .Our five key principles are: 1.Recycling Waste 2.Local production 3.Circular Design 4.Stylish Solutions 5.Collaborative Power

Portfolio highlights

• Aquaria — Aquaria provides solutions to secure access to clean water. The organization adapts its approaches based on the needs of these communities. It addresses water-related challenges through various methods.
• Delphi — Delphi turns your expertise into an always-on presence, so you can grow your reach, serve your audience, and lead with clarity, without burning out.
• Cambridge Terahertz — Cambridge Terahertz, a leader in terahertz (THz) imaging technology, offers an AI-powered Concealed Weapons Detection (CWD) solution to enhance workplace security. Our patent-pending system can see through clothing, luggage, plastic, paper, ceramics, and cardboard to detect concealed threats, including firearms, knives, and explosives.

Portfolio highlights

• Metagood — Metagood is the operating layer for tokenized assets across their full lifecycle: compliance, transfer rules, entitlements, corporate actions, and audit.
• Tem-Energy — Until now, businesses have had to buy power via Big Energy putting up with overpricing, sapping levels of service and glacial innovation. Now with tem. any company can buy Renewable Energy Direct. This allows businesses to save on energy costs whilst renewable generators are rewarded.
• ReBorn® Homewares — ReBorn purpose is to transform the sustainability of the global homewares industry. We are committed to creating the most stylish and planet-friendly homewares, and driving collective change in the UK and beyond .Our five key principles are: 1.Recycling Waste 2.Local production 3.Circular Design 4.Stylish Solutions 5.Collaborative Power

Portfolio highlights

• Patch App — Patch App UK intends to digitally transform the window cleaning business.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• MORFO — We combine local seeds, biological symbioses, drones and artificial intelligence to sustainably reforest and fight global warming around the world.
• Entocycle — Entocycle is developing the world’s most efficient and sustainable way to produce protein. The rainforests and savannahs of South America are being destroyed at shocking rates in order to grow crops such as soy to feed farm animals. Using insects to feed livestock requires significantly less land and water compared to soy whilst being a naturalpart of the diet for many animals including fish, chickens and pigs. Their technology is significantly more efficient at producing protein than traditional methods of production as their insects are vertically farmed and not restricted to floor space or area. Thanks to their automated system they can produce at industrial scale and offer farmers a cost-effective and sustainable alternative to soymeal and fishmeal.

Portfolio highlights

• Oxwash — Powered by Vanish, Oxwash provides on-demand laundry and eco-friendly dry cleaning services, creating a simple and sustainable laundry service for all.
• Fundrise — Fundrise helps locals claim ownership in the development of their city. Its first project and the first-ever crowdfunded real estate deal, was the development of acclaimed D.C. restaurant and retail store, Maketto, in 2013. It has grown since then, but its mission of providing people with a simpler, smarter, and more reliable way to invest hasremained the same.Today, Fundrise continues to shape the investment industry, creating a new alternative to investing in stocks and bonds. By combining technology with new federal regulations, they have opened up the once-unattainable world of direct private investments to everyone in the US, regardless of net worth.Fundrise was launched in Washington, D.C. in 2012.

Portfolio highlights

• Tewke — Tewke is a London based company that was founded in 2020 developing technology to deliver energy savings through AI enabled home automation. Tewke's mission is to reduce energy consumption in homes whilst elevating everyone's living experience.Tewke's first product, Tap, is an intelligent light switch that can be installed into anyhome without rewiring. This acts as the backbone of Tewke's energy control and home automation platform, and has already won international awards, such as the Red Dot Design Award.
• Alpaca — Alpaca API allows developers and businesses to build apps, embed investing, and trade algorithms

Portfolio highlights

• MEplace — MEplace creates a new approach to children’s wellbeing and preschool education. MEplace was founded in 2019 and was headquartered in England, UK.
• Two — Buy Now, Pay Later for your business customers. Two makes it easy and safe to offer invoice as a payment method on your e-commerce site.
• Kota — Replace your tools, brokers and outdated processes with the only platform that handles the entire employee benefits journey.

Portfolio highlights

• ARROE — ARROE software extends the lifespan of battery powered electronics, to reduce carbon emissions and e-waste
• MindLabs — Live sleep and meditation classes for your mind. Led by experts. Backed by neuroscience. Now available to download on the App Store.
• Fanbase — Fan engagement software built for the business of sport. Launch digital ticketing, memberships, hospitality packages in a matter of hours.

Portfolio highlights

• Altruistiq — Altruistiq is a decision-making environment for business sustainability teams.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Hydrologiq — Unified operational platform across battery, solar, hydrogen and clean fuels. Connect data, context, logistics and demand into one intelligence layer.

Portfolio highlights

• Cekura AI — Cekura AI is an AI based Software Development firm offering Developer Tool to observe and test AI voice agents.
• Mentra — Exploring ideas with @Mentraglass. Follow for future updates.
• Cosmoserve Space — Cosmoserve Space is developing autonomous robotic spacecraft to mitigate the rapidly growing problem of orbital debris.

Portfolio highlights

• TinyRx — TinyRx was an on-demand prescription delivery service operating in the Bay Area. It shut down in May 2016.
• Finster AI — Finster is your AI research partner for finance. Personalized, proactive, and private intelligence for investment banking and asset management teams.
• Pandas — We are Pandas, and our mission is to give consumers the most value out of their smartphones with zero hassle by empowering them to sell/trade them in the fastest, safest, and easiest way possible. 1Bn (with a B!) smartphones stop being used yearly after you upgrade to the latest and greatest. But there is a solution as simple as trading themin and getting paid while participating in the circular economy. So, why aren’t people selling their old phones, we wondered? This is where Pandas comes in. Inspired by humans and powered by tech, we ensure that the frustrating experience of trading in your smartphone becomes fast, simple, and fun. Our patented A.I. technology in the Panda Flex allows us to identify any smartphone and evaluate its condition, from the smallest nick to serious technical issues, with unprecedented accuracy.

Portfolio highlights

• Ebury — Ebury UK | The Latest Fintech & Finance Solutions
• Huuva — Huuva’s tech-enabled Foodhalls bring local hero restaurants under one roof. Our mission is to revolutionize suburban dining by bringing the most beloved restaurants to underserved areas.The concept is simple yet powerful: each Huuva Foodhall hosts multiple fast-casual restaurant brands, offering variety for consumers and efficient expansion forpartners. Customers are served through dine-in, takeaway, and delivery, with the option to combine multiple brands within a single order.At the core is HuuvaOS, the operating system that keeps every kitchen running in perfect harmony. Managing timing, inventory, and orders, it allows chefs to focus on cooking. Enabled by HuuvaOS, the kitchen crew’s productivity is significantly higher than in a conventional restaurant.For restaurant brands, Huuva offers an effortless way to grow beyond their local neighborhood without financial risks or operational compromises. Through a network of tech-driven local Foodhalls, Huuva enables brands to launch and scale in new markets within weeks rather than years.
• Pandas — We are Pandas, and our mission is to give consumers the most value out of their smartphones with zero hassle by empowering them to sell/trade them in the fastest, safest, and easiest way possible. 1Bn (with a B!) smartphones stop being used yearly after you upgrade to the latest and greatest. But there is a solution as simple as trading themin and getting paid while participating in the circular economy. So, why aren’t people selling their old phones, we wondered? This is where Pandas comes in. Inspired by humans and powered by tech, we ensure that the frustrating experience of trading in your smartphone becomes fast, simple, and fun. Our patented A.I. technology in the Panda Flex allows us to identify any smartphone and evaluate its condition, from the smallest nick to serious technical issues, with unprecedented accuracy.

Portfolio highlights

• Relik — Relik is a UAE-based authentication platform that uses AI, visual recognition, and blockchain-backed verification to authenticate collectibles, luxury goods, artwork, and cultural assets. The platform creates tamper-resistant digital identities for physical items without using chips, tags, or holograms, enabling users to verify authenticity throughsmartphone-based object recognition and digital certification.
• Butler.gr —
• Neurohive — Neurohive builds precision livestock farming software for sheep and goat farmers. Digital Farmer helps you make data-driven decisions, improve animal welfare, and grow sustainably.

Portfolio highlights

• Medallion — Provider credentialing and enrollment reimagined. Accelerate time-to-revenue, stay compliant, and scale provider operations, without adding headcount, through automated credentialing and enrollment.
• Breyta — Gather all your qualitative data and our AI assistant transcribes, analyses and delivers you accurate product insights and patterns at scale in seconds.
• Journey Clinical — Journey Clinical is a platform that provides services to member psychotherapy practices that are independently owned and operated, and in no way owns, directs, or controls the mental healthcare clinicians providing care.

Portfolio highlights

• Kalder — Kalder is a unified web3 brand loyalty platform for brands and creators to drive meaningful engagement, onboard new users, and reward superfan communities.
• Stelia — Stelia builds distributed AI platforms that scale globally. Research-driven intelligent systems for healthcare, education, and enterprise operations worldwide
• Aurora — The Operating System for High Performance Living

Portfolio highlights

• CodeWords — CodeWords is a technology startup working on AI systems for workflow automation. Their platform CodeWords lets anyone create automations and AI workflows by chatting with AI. Agemo's technology is designed to build code-based workflows and systems that can autonomously reason through software.
• Qutwo — We unite Qutwo OS and world-class AI and quantum scientists with the most forward-looking enterprises to develop competitive edge through classical AI, hybrid, and full quantum systems. We tackle the most challenging problems in AI computing.
• Lovable — Build apps, websites, and digital products faster using Lovable's AI-powered platform, no deep coding skills required.

Portfolio highlights

• Hitmarker — Hitmarker is the largest gaming and esports jobs platform in the world.
• what3words — Every 3 metre square has a unique 3 word address.
• Motif — Bingung cari situs slot gampang maxwin? ALEXISTOGEL adalah agen slot gacor server Asia terpercaya dengan panduan akses anti-blokir dan info bocoran RTP tertinggi hari ini. Daftar sekarang dan nikmati sensasi jp terbesar di server paling stabil!

Portfolio highlights

• Net Purpose — Net Purpose makes ESG and impact measurement effortless for investors to accelerate the transition to a sustainable world.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• Factored — Landlord finance funded within 24 hours. No legal fees, no valuation fees, no need to refinance your mortgage. Soft credit checks, 90% approval.

Portfolio highlights

• Cledara — Manage, control and automate your Company's cloud software so that you can scale your operational processes, comply with regulations and save money.
• Northflank — Run AI agents, services, databases, and GPUs in secure microVMs. One governed path from commit to production, on our cloud or your own.
• Oyster — Hire, pay, manage, and take care of your globally distributed team with confidence. Try Oyster for free today!

Portfolio highlights

• DEScycle — Descycle e-waste recycling clean technology

Portfolio highlights

• Kenshō Health — Pharmacy Mall is a trusted online drugstore designed to make high-quality medications accessible and affordable for everyone.
• Wally Health — Unlimited dental cleanings and whitening for $199/year
• Growth Kitchen — Growth Kitchen provides a network of delivery-optimized kitchens coupled with food delivery solutions and support.

Portfolio highlights

• Lick — Lick | Paints, Wallpapers and Supplies. Your Room, Covered
• By Rotation — Rent over 25000+ designer fashion items online from our free app. Discover luxury designer dresses, clothing, bags and accessories from your trending favorite brands.
• Anch.ai — The Asenion AI Governance, Risk and Compliance Management Platform delivers Fast AI with Assurance, Integrity, and Reliability, enabling technology and policy experts to connect and collaborate, bridging the AI oversight gap seamlessly.

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.

Portfolio highlights

• qomodo — Qomodo: La piattaforma BNPL innovativa. Rate a tasso zero, approvazioni veloci, transazioni sicure. Rivoluzionaria nell'acquisto per aziende e consumatori.
• Omnea — The all-in-one procurement platform. Request purchases, automate approvals, and streamline your procurement process in one centralised solution.
• Dimension — The state of the art collaboration platform for modern engineering teams. Chat, project management, smart actions, and more, accelerated by AI.

Portfolio highlights

• CitizenX — CitizenX is the secure and private platform that helps you diversify your passport portfolio, ensuring a safe future for you and your loved ones.
• Talyn Air — Inspired by two-stage rockets, our innovative eVTOL uses two flight vehicles to transform flight. Fixed-wing performance with VTOL capabilities.
• CaSRevolution — A novel disease-modifying approach against neurodegeneration

Portfolio highlights

• Audos — Where everyday entrepreneurs build small AI companies
• Qutwo — We unite Qutwo OS and world-class AI and quantum scientists with the most forward-looking enterprises to develop competitive edge through classical AI, hybrid, and full quantum systems. We tackle the most challenging problems in AI computing.
• Isometric — Isometric is a carbon removal standard and registry.

Portfolio highlights

• Forteus — Forteus is an asset manager focused on blockchain technology and digital assets.
• Emitwise — The Emitwise technology platform is now part of Green Project Technologies, delivering end-to-end decarbonization solutions for enterprises.
• Antler — Build your next company with Antler, a global day zero investor enabling exceptional founders to start great companies, from the very beginning. Apply now!

Portfolio highlights

• Lawyerd — Lawyerd! is fully automatically found infringements, finding responsible for hosting bodies, formulating complaints, adding evidence of the violation, and sending completed complaints in 3 seconds. Also, our clients can store their products on our platform and put the information into the blockchain when products are created
• Voltaage — Voltage makes it easy for fleet managers of SMEs to simulate, plan and run their fleet electrification without disrupting business operations and drivers’ habits. Our marketplace offers and crafts tailored package deals for EVs, charging stations & electric fuel cards.With our expertise: We help them to make data-driven decisions and tounderstand the true opportunity cost of every car in their fleet, We simulate the optimal EV fleet composition in days instead of months, And we compare the total cost of ownership (TCO) and carbon emissions projections using fleet data. Our business model is based on 2 streams of revenues, a SaaS subscription model charged monthly to companies using our software for their transition to electric mobility; and a brokerage fee, charged to partners for any solution sold through our platform (cars, charging stations, aftersale solutions)Join the fleet revolution.
• PowerMarket — A platform for turn-key solar life cycle management.

Portfolio highlights

• Puraffinity — Puraffinity develops targeted materials for water treatment, focused on forever chemicals called PFAS. Our strategic intent is to provide 1 billion people with PFAS safe water by 2030
• Moixa Technology — Moixa Technology develops the Maslow intelligent energy storage solution, enabling homes to store energy and benefit from revenue streams generated by trading energy through GridShare, an SaaS platform that aggregates energy from groups of Maslow energy storage systems. . The company develops smart DC technologies to power DC lighting, computing,electronics from grid-shifted storage or local PV from smart DC hubs, variable DC networks and sockets. The technology and IPR reduces grid peak by shifting DC device load and powering DC devices efficiently without inverters or AC/DC adaptors, together with providing smart control and energy management. The technology aims to address the 1 trillion kwh + lost annually in power conversion, and the significant growing DC demand in homes, offices from ICT, LED lighting and the rise in internet connected devices.

Portfolio highlights

• Alaan — Take control of your business spend.
• Taleemabad — Taleemabad - A home of adaptive learning for teachers, students, parents and school owners. Creative teaching methods with innovative technology.
• Silkhaus — Silkhaus makes living comfortable and convenient through 24/7 mobile support and a digital concierge.

Portfolio highlights

• Jua — Jua offers AI-based solutions for the early detection of significant weather events, focusing on enhancing weather forecasting accuracy for energy trading. The platform provides tools for historical weather analysis and real-time monitoring, catering specifically to the needs of energy traders and developers. Jua is committed to developing auniversal physics simulator to deepen the understanding of weather dynamics and their impact on human activities. By leveraging advanced technology, Jua enables its clients to make informed decisions based on accurate weather data, ultimately supporting efficient energy management and trading strategies.
• Altruistiq — Altruistiq is a decision-making environment for business sustainability teams.
• RosieReality — Rosie is an educational app for iPhone and iPad. The app is perfect for curious kids of ages 9 and up. Kids program Rosie the Robot using magical 3D shapes to explore AR puzzles.

Portfolio highlights

• Stackfix — Stackfix operates as a software comparison platform.
• Rivan Industries — Rivan Industries designs and builds modular, vertically integrated, synthetic fuel plants.
• Asymmetric Security — Asymmetric Security is an AI-native cybersecurity startup specializing in digital forensics and incident response. It combines elite forensic experts with proprietary AI to accelerate investigations, especially Business Email Compromise (BEC) attacks, at less than half the cost of competitors while shrinking timelines from days to hours.

Portfolio highlights

• Isometric — Isometric is a carbon removal standard and registry.
• Additive Rocket Corporation — At Arc Enginee, we are passionate about exploring the ever-evolving world of technology and bringing you the latest innovations, trends, and insights.
• DLT (short for data load tool) — dlt is the open-source Python library 50,000s of developers use to build data pipelines. dltHub is the agentic platform that deploys, monitors, and scales them.

Portfolio highlights

• ScyAI — Risk intelligence that thinks with you.
• Noah — API-first stablecoin payments, enterprise-grade compliance and real-time settlements, powered by stablecoin technology.
• Flow Engineering — Requirements management, made collaborative

Portfolio highlights

• Zumo — Zumo is a revolutionary new way for people and businesses to interact with money. When we say revolutionary, we mean it. Zumo’s not elitist. It’s not exclusive. It’s not only for the one percent. Zumo is smart money for everyone.Zumo allows you to buy, send and store crypto simply and securely. Zumo lets you exchange crypto seamlessly withtraditional currency and pay for goods and services anywhere with our Convertible Debit Card.ZumoPay is a safe and easy way for brands to accept payments in crypto currency, with lower transaction fees than traditional payment solutions.ZumoKit is our Wallet as a Service, Software Development Kit (SDK), giving you the ability to setup and manage your own cryptocurrency payments infrastructure.
• Be Nosy — Nosy is wearable tech with data play that helps you breathe purified air anywhere at any time. Our state of the art patented technology developed by former Dyson engineers is more effective at protecting you from pollution, viruses and allergens than any other solution in the market. While our particles and breathing sensor technology will help youknow exactly what is going into your body.
• Togather — Create your event on Togather, the UK's most trusted events booking platform, choose from our roster of over 1,500 of the best and most passionate creators...

Portfolio highlights

• Insempra — What if we made as many cancer drugs next year as we have in the last decade?
• Biomicrogels Group — Biomicrogels Group is the developer and patent holder for biomicrogels - a unique substance produced from agricultural waste such as sugar beet, apple, sunflower pomace - capable of addressing the global environmental and climate change problems.The company's biomicrogel-based solutions add value in produced water treatment, cutting fluidseparation, vegetable oil extraction, cleaning of oil spills at sea and on land.We also manufacture a range of environmentally friendly household cleaning products under own brand, WONDERLAB.
• Harbinger — Founded by veterans of Canoo and Faraday Future, Harbinger is an automotive company that develops EV platforms optimized for medium-duty trucks and delivery vans.

Portfolio highlights

• Dognosis — unleashing canine superpowers to democratize early cancer detection join our waitlist - https://t.co/zcCjHsq10v
• Fundably — Fundably - Get The Right UK Business Loan | Access £1k-£2m
• VIAN Therapeutics — VIAN Therapeutics is an early-stage biotechnology company focused on transforming retinal disease treatment. With a first-in-class, non-invasive eyedrop as its lead product, VIAN aims to replace invasive injections for conditions like age-related macular degeneration (AMD) and diabetic macular edema (DME). Backed by strong preclinical data andongoing clinical testing, VIAN is positioned to address significant unmet medical needs and disrupt the $15 billion retinal disease market.

Portfolio highlights

• Hubflo — Hubflo is building an all-in-one work OS to help small businesses manage their business. Instead of having 10 complicated and expensive pieces of software, Hubflo offers SMB everything they need to run their business (CRM, projects, invoicing, expenses...) in a single comprehensive, simple and affordable platform.
• Tetra AI — Tetra AI is a health technology firm that has created an AI-powered software platform designed to assist hospitals in managing surgical waiting lists and operating room schedules. The system evaluates patient lists, staff availability, and theatre capacity to generate optimized surgical plans that minimize delays and improve resource utilization.It is mainly employed by NHS hospitals and operational teams to enhance elective care performance within the limits of available resources.
• Sidekick — Expertly-managed portfolios for the modern investor

Portfolio highlights

• Heat Geek — Heat Geek makes it easy for homeowners to save money on their bills with AI designed, efficient heat pump systems.