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The CleanTech sector is tackling environmental challenges with a wide range of technologies across the globe. Companies are working on everything from carbon capture and nuclear energy to creating plastic alternatives.
This includes major players like X-energy, which has raised $1 billion for its modular nuclear reactors, and Climeworks, with $946.1 million for direct air capture.
Below is our list of 100 CleanTech startups worth keeping an eye on.
Everything you need to raise funding for your startup, including 3,500+ investors, 7 tools, 18 templates and 3 learning resources.
Buy It For $97 $297 →Information about the industries, countries, and cities they generally invest in.
Get the Sheet for $50Information about their valuation, HQ's location, founded year, name of founders, funding amount and number of employees.
Get the Sheet for $50List of startup investors in the BioTech, Health, and Medicine industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the AI and Machine Learning industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the FinTech and Finance industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50Tether builds software that turns parked electric vehicles into a vast, interconnected battery for the power grid. Their AI platform optimizes EV charging and discharging to help utilities manage energy demand and increase stability.
X-energy develops advanced modular nuclear reactors and proprietary fuel technology for clean energy generation. The company's Xe-100 reactor is designed to be a safer and more versatile alternative to traditional nuclear power plants.
Chestnut Carbon develops and manages large-scale forestry projects through reforestation and afforestation. These nature-based initiatives generate high-quality carbon removal credits.
Climeworks develops direct air capture technology to remove carbon dioxide from the atmosphere. Their facilities offer carbon removal as a service, permanently storing the captured CO₂ for businesses and individuals.
Pivot Bio develops microbial products that help cereal crops like corn, wheat, and sorghum self-fertilize. Their technology enables plants to capture nitrogen from the atmosphere, offering a sustainable alternative to synthetic fertilizers.
Chakr Innovation develops cleantech products that capture harmful emissions from diesel generators. Their material science approach converts the captured particulate matter into a pigment, providing a sustainable solution to air pollution.
Xampla creates a high-performance, natural material from plant protein as a sustainable alternative to single-use plastics. Their technology offers a fully biodegradable solution for brands in the homecare, personal care, and food industries.
Cylib developed a proprietary recycling process to transform waste from end-of-life batteries and production scrap into marketable raw materials. Their technology enables a circular economy for the battery industry by reintroducing valuable resources back into the supply chain.
Terrestrial Energy develops advanced nuclear power plants to provide carbon-free energy for global industry. Their Integral Molten Salt Reactor (IMSR) technology is designed to generate cost-competitive heat and electricity.
Kyoto Fusioneering builds specialized components and plant engineering solutions for the fusion energy sector. Their work focuses on key systems like plasma heating and fuel cycles, aiming to accelerate the path to commercial fusion power.
Our top ten picks are just the beginning of the story. Together, these companies have raised billions of dollars to tackle challenges in energy, manufacturing, and more.
The list includes companies at every stage, from brand new startups to established players. Below is a look at the other cleantech startups that are catching our attention.
| Startup | Main Industry | Year Founded | Amount Raised | Last Funding Round |
|---|---|---|---|---|
| Environment | 2017 | $80M | Venture Round | |
| Mobility | 2009 | $310.8M | Undisclosed | |
| Manufacturing | 2007 | $175.5M | Venture Round | |
| AI | 2017 | $75.7M | Series B | |
| Environment | 2007 | $329.3M | Series D | |
| Energy | 2020 | $298.3M | Venture Round | |
| Hardware | 2012 | $352.6M | Venture Round | |
| AgTech | 2020 | $70.4M | Series C | |
| Environment | 2007 | $505.3M | Grant | |
| Energy | 2021 | $151.7M | Debt Financing | |
| Energy | 2021 | $11M | Grant | |
| Mobility | 2021 | $41.9M | Series B | |
| Biotech | 2019 | £1.6M | Equity Crowdfunding | |
| Energy | 2013 | $19.5M | Venture Round | |
| Environment | 2022 | $710.5M | Venture Round | |
| Energy | 2009 | $7.7B | Debt Financing | |
| AgTech | 2018 | $100M | Series B | |
| Energy | 2021 | $373.3M | Private Equity | |
| AI | 2020 | £4M | Seed | |
| Energy | 2021 | $8.5M | Series A | |
| Manufacturing | 2012 | $455.5M | Convertible Note | |
| Energy | 2020 | $20.3M | Series A | |
| Energy | 2014 | $4.7M | Grant | |
| Manufacturing | 2018 | $8.8M | Seed | |
| Manufacturing | 2019 | $102.6M | Series B | |
| Environment | 2020 | $202M | Venture Round | |
| Design | 2018 | $25.6M | Seed | |
| AI | 2018 | $88.3M | Series B | |
| Energy | 2006 | $1.5B | Venture Round | |
| Energy | 2020 | $798.3M | Debt Financing | |
| Environment | 2017 | $16.6M | Series A | |
| Environment | 2006 | £120M | Debt Financing | |
| Energy | 2014 | $575.5M | Series E | |
| Energy | 2017 | $1.5B | Debt Financing | |
| Energy | 2013 | $392.4M | Series D | |
| Environment | 2013 | $491.5M | Venture Round | |
| AgTech | 2018 | $8.6M | Series A | |
| Hardware | 2016 | $13.8B | Debt Financing | |
| Energy | 2022 | $7.7M | Seed | |
| Mobility | 2020 | $82.5M | Corporate Round | |
| Mobility | 2017 | $306M | Grant | |
| Energy | 2009 | $1.8B | Debt Financing | |
| Energy | 2020 | $300M | Series C | |
| AI | 2015 | $145M | Venture Round | |
| Energy | 2014 | $266.6M | Grant | |
| Energy | 2013 | SEK80M | Grant | |
| Analytics | 2020 | $100k | Seed | |
| Environment | 2020 | $35.5M | Series B | |
| Environment | 2016 | $48.9M | Grant | |
| Energy | 2001 | $145M | Venture Round | |
| Environment | 2021 | £4.4M | Seed | |
| Environment | 2017 | $7.5M | Venture Round | |
| Enterprise | 2021 | $1.5M | Seed | |
| Environment | 2023 | $400k | Pre-Seed | |
| Analytics | 2022 | $25M | Series A | |
| Energy | 2012 | $73.2M | Series A | |
| Environment | 2015 | $2.9B | Private Equity | |
| Environment | 2009 | $212.4M | Series C | |
| Energy | 2019 | $1.2B | Debt Financing | |
| Energy | 2018 | $42.5M | Series A | |
| Energy | 2022 | $36.4M | Series A | |
| Marketing | 2022 | €2.1M | Debt Financing | |
| Energy | 2016 | $9.8M | Venture Round | |
| Environment | 2016 | $114.1M | Series E | |
| Manufacturing | 2020 | $1.2M | Seed | |
| Environment | 2020 | $73.3M | Debt Financing | |
| Environment | 2024 | $500k | Seed | |
| Environment | 2019 | $5.6M | Seed | |
| Environment | 2017 | €15.7M | Series A | |
| AgTech | 2016 | $26.7M | Series A | |
| Mobility | 2018 | €51M | Undisclosed | |
| Environment | 2017 | $35M | Series B | |
| AgTech | 2014 | $9.8M | Series A | |
| Environment | 2021 | €9.9M | Grant | |
| AI | 2018 | £12.3M | Series A | |
| AgTech | 2019 | $13M | Seed | |
| Manufacturing | 2022 | €2M | Pre-Seed | |
| AI | 2021 | €8.2M | Seed | |
| Media | 2016 | £24M | Series B | |
| Environment | 2013 | A$81M | Series B | |
| Environment | 2016 | €11.9M | Series A | |
| Analytics | 2019 | €5.5M | Seed | |
| Manufacturing | 2016 | €10M | Venture Round | |
| Environment | 2018 | €650k | — | |
| Environment | 2016 | $5.1M | — | |
| AgTech | 2017 | €550k | Seed | |
| Biotech | 2014 | $30M | Series A | |
| Environment | 2015 | $127.1M | Debt Financing | |
| Mobility | 2021 | $5.5M | Seed | |
| Energy | 2016 | $15.2M | Venture Round |
