Top 15 CleanTech Startup Investors in Denmark in May 2026

Portfolio highlights

• NitroVolt — NitroVolt: the next generational step of sustainable ammonia.
• Serviceform — Welcome to future of communication - the truly all-in-one conversion and management software built for established businesses. Start now!
• Techarena — Since 2014 Techarena is the platform for innovation and Tech in the Nordics. From supporting startups and scaleups to bringing the Tech and Business world together at Scandinavia's Biggest Events.

Portfolio highlights

• NitroVolt — NitroVolt: the next generational step of sustainable ammonia.
• Concert Bio — Concert Bio helps businesses manage their microbiome. We combine monitoring with analytics to develop interventions that improve the microbiome that matters to you. Our pilot program for CEA growers is currently live and accepting partners, see website for details.
• Milvus Advanced — Our Midas-touch alloys replicate the functional properties of platinum-group metals at a fraction of the cost.

Portfolio highlights

• Ephos — Designing and manufacturing glass-based integrated photonic circuits that power the most advanced classical and quantum devices
• C-Motive Technologies — C-Motive Technologies focuses on reinventing the electric motor. Its motors run on the principle of electrostatic forces, also known as "static cling,"​ and stands to change the machines that shape and run people's lives. Founded by Dan Ludois and Justin Reed in 2012, C-Motive Technologies is headquartered in Madison, Wisconsin.
• 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.

Portfolio highlights

• Synthium — Synthium offers Cognition-as-a-Service (CaaS) for consumer robotics, using gamified web-based simulations to crowdsource human cognitive data for training robot AI models. Users engage in robotics tasks like spatial navigation via webcam and microphone inputs, generating diverse datasets for model training across robot types such as humanoids anddrones. Data captures human intuition in dynamic environments, enabling scalable AI development without physical robots.
• Alchemyst AI — Alchemyst AI is an innovative generative AI software-as-a-service (SaaS) startup that leverages cutting-edge artificial intelligence technology to deliver unique solutions tailored to various industries. Alchemyst aims to empower businesses to harness the potential of generative AI for enhanced creativity, efficiency, and decision-making.We arebuilding force multipliers within teams across various verticals - starting with Maya, our first Alchemyst for Sales Development. We would soon be horizontally scaling to other roles as well, integrating into wherever you work.Since inception, we have taken a bottom-up approach to building our platform as opposed to a top-down approach usually seen in SaaS products - keeping the client experience first.
• Cooper Pet Care — Just Russel honden- en kattenvoeding op maat. Op basis van ras, leeftijd, gezondheid en gewicht. Makkelijker voor jou, beter voor je huisdier!

Portfolio highlights

• Captego — Unique, high-speed field data capture. Empower your inspectors & surveyors with our unique collection app. Benefit from high quality data to automate reports and data insights.
• LastSwab — LastSwab launched May 2019 through the crowdfunding platform Kickstarter. At $16 a swab, LastSwab is meant to last at least 1,000 uses and is the easy-to-clean, reusable alternative to the abundant waste caused by single-use swabs around the globe. The tip of the swab is made from medical silicone and nylon and comes in a biodegradable case made ofa corn-based material. LastSwab can be easily cleaned using soap and water and is also dishwasher safe. It comes in a standard swab for cleaning and a pointed swab for makeup application. Be the change and #SwabYourHabits.
• Donkey Republic — Donkey Republic is leading bike share service in Europe with footprint in more than 10 key cities in Europe. We operate our locations with partners, and use custom-branded bikes. Our software backbone is developed by us with unique features that ensure we respect public space with our hub-centric service model. At the same time, we maximizepredictability of bike availability and convenience. We pride ourselves in service innovation.

Portfolio highlights

• Addis Energy — Addis Energy is on a mission to alter the way we feed and fuel our society, harnessing the Earth's potential for clean ammonia production.
• Trener Robotics — Trener Robotics develops AI software that enables industrial robots to operate autonomously, adapt to variability, and deploy faster in manufacturing.
• Finwave Semiconductor — Gallium Nitride (GaN), an amazing semiconductor with extraordinary electronic properties, will be one of the most important semiconductor technology to power the future of sustainability.

Portfolio highlights

• Kvantify — Quantum computing will revolutionize many aspects of computing. We can help your business harness the full potential of Quantum Computing and High-Performance Computing today.
• Propane — Propane is an AI-powered operating system for customer intelligence, built for modern product and GTM teams. It automates continuous customer and user research through embedded AI agents, integrated workflows, and real-time analysis—turning feedback into a scalable system, not a one-off task.
• Akson Robotics — Akson Robotics is a developer of AI and robotics-based products that focus on greener and efficient agriculture through precision farming.

Portfolio highlights

• Voltiris — Unlock renewable energy in your greenhouse with Voltiris' spectral filtering technology.
• NitroVolt — NitroVolt: the next generational step of sustainable ammonia.
• Brineworks — Industry leading costs through cutting edge electrochemistry, and renewably powered intermittent operation

Portfolio highlights

• bezahl.de — Bezahl provides digital and automated payment management and solutions.
• Remuner — Say goodbye to spreadsheets. Remuner is the sales compensation software that automate your commissions and drive performance.
• Shalion — Shalion enables ambitious brands to navigate their journey to digital shelf excellence with a unique, unified digital shelf & retail media insights solution.

Portfolio highlights

• Nuclearn — Nuclearn is a software company delivering AI solutions for automating Nuclear Industry tasks.Nuclearn was established in 2020 by two esteemed veterans from the nuclear industry, Jerrold Vincent and Bradley Fox, driven by their passion for innovation. With backgrounds in nuclear engineering, business intelligence, and process improvement, theco-founders came together to create the industry's pioneering in-house data science team at the Palo Verde Nuclear Generating Station in 2016.Their remarkable work quickly gained recognition throughout the nuclear sector, resulting in a US-issued patent and the prestigious NEI Best of the Best, Top Innovative Practice Award in 2020. Fueled by this innovative spirit and a mission to benefit the entire nuclear power industry, Nuclearn was born to provide a safe and efficient way to automate critical processes in the field.
• Aalo Atomics — Creating abundant and dependable clean energy to power humanity for generations.
• Blue Energy — Blue Energy is a nuclear power plant company that provides reliable, clean, and abundant electricity.

Portfolio highlights

• Aegir Insights — We enable strategic decision-making about offshore wind with powerful commercial tools and bespoke research. Discover our latest insights online.

Portfolio highlights

• LastSwab — LastSwab launched May 2019 through the crowdfunding platform Kickstarter. At $16 a swab, LastSwab is meant to last at least 1,000 uses and is the easy-to-clean, reusable alternative to the abundant waste caused by single-use swabs around the globe. The tip of the swab is made from medical silicone and nylon and comes in a biodegradable case made ofa corn-based material. LastSwab can be easily cleaned using soap and water and is also dishwasher safe. It comes in a standard swab for cleaning and a pointed swab for makeup application. Be the change and #SwabYourHabits.
• Nordic Salt Cycle — Nordic Salt Cycle provides a scalable melting salt methods for collecting important and strategic minerals from end-of-life products.
• GreenShift Technologies — GreenShift Technologies is a sustainable computing platform designed to optimize cloud infrastructure and applications.

Portfolio highlights

• Antithesis — At Antithesis, we want to bring the confidence and productivity benefits of autonomous testing to your team. We have developed a platform that searches for bugs in your software, in a controlled environment where all bugs are reproducible. Our first offering finds fault tolerance bugs: failures of your software that occur under specific network, hardware or timing conditions.
• Blue Energy — Blue Energy is a nuclear power plant company that provides reliable, clean, and abundant electricity.
• Impulse Space — Economical and nimble last-mile space payload delivery

Portfolio highlights

• WeaveGrid — WeaveGrid operates with utilities and owners of electric vehicles (EV) to allow and speed up transportation electrification. Using machine learning, optimization, and predictive analytics, the company's software solution solves several EV-grid integration challenges for utilities in a systems-oriented manner; helps integrate renewable energyresources on the grid; and saves utility customers' money on their bills.
• Fourth Power — Fourth Power makes renewable energy an on-demand energy source through utility-scale, thermal battery technology. With the ability to provide flexible-duration energy storage, we can start small and grow with the grid to save consumers money and ensure a clean energy future.
• 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

Portfolio highlights

• Belidor — Belidor Helps preconstruction teams win more bids with AI bid leveling and bid management tools.
• Portchain — Home Portchain. Portchain Berth Optimization Engine helps terminals that want to increase their quayside profitability by modernising their
• groundcover — Instantly pinpoint bleeding issues in production & troubleshoot quickly with groundcover. All with zero code changes.