# Top 50 Clean Energy Startups Worldwide by Funding (2026)

> The 50 best-funded clean energy startups worldwide, ranked by total funding raised: $64B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/clean-energy-startups (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Crusoe** Crusoe is an energy-first AI infrastructure company that develops and operates large-scale, AI-optimized data centers powered by clean energy sources.](https://millionrounds.com/company/crusoe) Crusoe is an energy-first AI infrastructure company that develops and operates large-scale, AI-optimized data centers powered by clean energy sources. *Founded* 2018 Denver, United States **$9.9B** last round Sept 2026
- 2 [**Atlas Renewable Energy** Atlas Renewable Energy is a renewable energy company that develops, builds, and operates solar and wind projects.](https://millionrounds.com/company/atlas-renewable-energy) Atlas Renewable Energy is a renewable energy company that develops, builds, and operates solar and wind projects. *Founded* 2017 Miami, United States **$3.1B** last round Apr 2026
- 3 [**SSE**](https://millionrounds.com/company/sse) *Founded* 1998 Perth, United Kingdom **$2.7B** last round Jun 2026
- 4 [**EVgo** EVgo provides fast charging networks for private and public electric vehicles.](https://millionrounds.com/company/evgo) EVgo provides fast charging networks for private and public electric vehicles. *Founded* 2010 Los Angeles, United States **$2.5B** last round Jul 2025
- 5 [**Eni Plenitude** Eni Plenitude supplies energy for homes and institutions.](https://millionrounds.com/company/eni-plenitude) Eni Plenitude supplies energy for homes and institutions. *Founded* 2017 San Donato Milanese, Italy **$2.3B** last round Jun 2025
- 6 [**Base Power**](https://millionrounds.com/company/base-power) *Founded* - United States **$2.2B** last round Aug 2026
- 7 [**Fortescue Future Industries** Fortescue Future Industries is a green energy and product company committed to producing zero-emission hydrogen from renewable sources.](https://millionrounds.com/company/fortescue-future-industries) Fortescue Future Industries is a green energy and product company committed to producing zero-emission hydrogen from renewable sources. *Founded* 2020 East Perth, Australia **$2.0B** last round Oct 2025
- 8 [**Form Energy** Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration.](https://millionrounds.com/company/form-energy) Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration. *Founded* 2017 Somerville, United States **$2.0B** last round Sept 2026
- 9 [**Commonwealth Fusion Systems**](https://millionrounds.com/company/commonwealth-fusion-systems) *Founded* - United States **$1.9B** last round Jul 2026
- 10 [**Stegra** Stegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy.](https://millionrounds.com/company/stegra) Stegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy. *Founded* 2020 Stockholm, Sweden **$1.6B** last round Apr 2026
- 11 [**X-energy** X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.](https://millionrounds.com/company/x-energy) X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power. *Founded* 2009 Rockville, United States **$1.5B** last round May 2026
- 12 [**Dimension Energy**](https://millionrounds.com/company/dimension-energy) *Founded* - United States **$1.5B** last round Aug 2026
- 13 [**Kyoto Fusioneering** Kyoto Fusioneering Ltd.](https://millionrounds.com/company/kyoto-fusioneering) Kyoto Fusioneering Ltd. *Founded* 2019 Chiyoda, Japan **$1.3B** last round Aug 2026
- 14 [**Return**](https://millionrounds.com/company/return) *Founded* - Netherlands **$1.3B** last round Nov 2026
- 15 [**Generate Capital** Generate Capital is an investment and operating platform for sustainable infrastructure.](https://millionrounds.com/company/generate-capital) Generate Capital is an investment and operating platform for sustainable infrastructure. *Founded* 2014 San Francisco, United States **$1.3B** last round Sept 2026
- 16 [**Redwood Materials** Redwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries.](https://millionrounds.com/company/redwood-materials) Redwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries. *Founded* 2017 Carson City, United States **$1.2B** last round Jan 2026
- 17 [**EnergyRe** EnergyRe is at the center of the clean energy future.](https://millionrounds.com/company/energyre) EnergyRe is at the center of the clean energy future. *Founded* 2020 New York, United States **$1.2B** last round Oct 2026
- 18 [**CleanSpark** CleanSpark (Nasdaq: CLSK) is America's Bitcoin MinerTM.](https://millionrounds.com/company/cleanspark) CleanSpark (Nasdaq: CLSK) is America's Bitcoin MinerTM. *Founded* 2014 Henderson, United States **$1.1B** last round Nov 2025
- 19 [**Fervo Energy** Fervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems.](https://millionrounds.com/company/fervo-energy) Fervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems. *Founded* 2017 Houston, United States **$1.1B** last round Sept 2026
- 20 [**Enpal** Enpal is a photovoltaics leasing firm that provides solar power systems for homeowners.](https://millionrounds.com/company/enpal) Enpal is a photovoltaics leasing firm that provides solar power systems for homeowners. *Founded* 2017 Berlin, Germany **$1.0B** last round Oct 2025
- 21 [**SB Energy** SB Energy provides renewable energy at scale, accelerating the global energy transition.](https://millionrounds.com/company/sb-energy) SB Energy provides renewable energy at scale, accelerating the global energy transition. *Founded* 2015 Redwood City, United States **$1.0B** last round Jan 2026
- 22 [**ReNew Power**](https://millionrounds.com/company/renew-power) *Founded* - India **$984M** last round Jul 2019
- 23 [**CuspAI** CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.](https://millionrounds.com/company/cuspai) CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin. *Founded* 2024 Cambridge, United Kingdom **$950M** last round Jul 2026
- 24 [**The Appalachian Regional Clean Hydrogen Hub** ARCH2's mission is to provide an interconnected, full value chain H2Hub solution.](https://millionrounds.com/company/the-appalachian-regional-clean-hydrogen-hub) ARCH2's mission is to provide an interconnected, full value chain H2Hub solution. *Founded* - Morgantown, United States **$925M** last round Jul 2024
- 25 [**Solar Landscape** Solar Landscape is an installer and operator of solar energy systems.](https://millionrounds.com/company/solar-landscape) Solar Landscape is an installer and operator of solar energy systems. *Founded* 2012 Asbury Park, United States **$900M** last round Jun 2026
- 26 [**Pacific Fusion** Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.](https://millionrounds.com/company/pacific-fusion) Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes. *Founded* 1997 Fremont, United States **$900M** last round Nov 2024
- 27 [**Blue Energy** Blue Energy is a nuclear energy company that designs and manufactures modular nuclear power plants.](https://millionrounds.com/company/blue-energy) Blue Energy is a nuclear energy company that designs and manufactures modular nuclear power plants. *Founded* - Plainfield, United States **$805M** last round Jul 2026
- 28 [**Intersect Power**](https://millionrounds.com/company/intersect-power) *Founded* - United States **$800M** last round Dec 2024
- 29 [**Avantus** Avantus develops large-scale solar and solar-plus-storage projects to drive the adoption of zero-emission energy.](https://millionrounds.com/company/avantus) Avantus develops large-scale solar and solar-plus-storage projects to drive the adoption of zero-emission energy. *Founded* 2019 El Dorado Hills, United States **$800M** last round Sept 2026
- 30 [**Panamint Capital** Panamint Capital is an energy investment firm that focuses on developing electric transmission and optimizing power generation.](https://millionrounds.com/company/panamint-capital) Panamint Capital is an energy investment firm that focuses on developing electric transmission and optimizing power generation. *Founded* 2019 United States **$769M** last round Nov 2026
- 31 [**Rezolv Energy** Rezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic.](https://millionrounds.com/company/rezolv-energy) Rezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic. *Founded* 2022 Prague, Romania **$763M** last round Nov 2026
- 32 [**XPLR Infrastructure** XPLR Infrastructure is a renewable energy company that owns, operates, and acquires contracted clean energy projects.](https://millionrounds.com/company/xplr-infrastructure) XPLR Infrastructure is a renewable energy company that owns, operates, and acquires contracted clean energy projects. *Founded* - North Palm Beach, United States **$750M** last round Nov 2025
- 33 [**Maxwell Power** Maxwell Power is a renewable energy company that installs solar panels.](https://millionrounds.com/company/maxwell-power) Maxwell Power is a renewable energy company that installs solar panels. *Founded* - San Diego, United States **$750M** last round Jun 2026
- 34 [**BNZ energy** BNZ, an independent power producer (IPP), plans, installs, and runs solar photovoltaic projects.](https://millionrounds.com/company/bnz-energy) BNZ, an independent power producer (IPP), plans, installs, and runs solar photovoltaic projects. *Founded* 2020 Madrid, Spain **$740M** last round Oct 2024
- 35 [**Octopus Energy Group** Octopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales.](https://millionrounds.com/company/octopus-energy-group) Octopus Energy Group is an England-based holding company that operates businesses in areas such as energy generation and electric vehicle sales. *Founded* 2016 London, United Kingdom **$681M** last round Dec 2025
- 36 [**Radial Power** Radial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners.](https://millionrounds.com/company/radial-power) Radial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners. *Founded* 2022 Houston, United States **$660M** last round Jan 2026
- 37 [**Origis Energy** Origis Energy focuses on the development, construction, and operation of solar power plants and energy storage solutions.](https://millionrounds.com/company/origis-energy) Origis Energy focuses on the development, construction, and operation of solar power plants and energy storage solutions. *Founded* 2008 Miami, United States **$651M** last round Jan 2025
- 38 [**rPlus Energies** rPlus Energies builds new power plants to help rebuild America's energy infrastructure.](https://millionrounds.com/company/rplus-energies) rPlus Energies builds new power plants to help rebuild America's energy infrastructure. *Founded* 2018 Salt Lake City, United States **$650M** last round Mar 2026
- 39 [**Proxima Fusion** Proxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max Planck Institute for Plasma Physics.](https://millionrounds.com/company/proxima-fusion) Proxima Fusion is a European fusion energy company based in Munich, Germany, founded in 2023 as the first spin-out from the Max Planck Institute for Plasma Physics. *Founded* 2023 Munich, Germany **$636M** last round Jul 2026
- 40 [**GIGA Storage** GIGA Storage develops large-scale sustainable energy storage systems.](https://millionrounds.com/company/giga-storage) GIGA Storage develops large-scale sustainable energy storage systems. *Founded* 2018 Amstelveen, Netherlands **$634M** last round Oct 2026
- 41 [**WildFire Energy** Wildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprie](https://millionrounds.com/company/wildfire-energy) Wildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprie *Founded* 2016 Petrie Terrace, United States **$604M** last round Jul 2026
- 42 [**1KOMMA5°** 1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas.](https://millionrounds.com/company/1komma5) 1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas. *Founded* 2021 Hamburg, Germany **$563M** last round Oct 2026
- 43 [**Newcleo** Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.](https://millionrounds.com/company/newcleo) Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies. *Founded* 2021 Paris, United Kingdom **$563M** last round Sept 2026
- 44 [**Ellevio** Ellevio is a Swedish energy provider.](https://millionrounds.com/company/ellevio) Ellevio is a Swedish energy provider. *Founded* 2015 Stockholm, Sweden **$555M** last round May 2025
- 45 [**ILOS Projects** ILOS Projects is a Independent Power Producer.](https://millionrounds.com/company/ilos-projects) ILOS Projects is a Independent Power Producer. *Founded* 2018 Karlsruhe, Germany **$530M** last round Apr 2026
- 46 [**Abound Solar** Abound Solar was a thin-film solar module manufacturer based in Loveland, Colorado.](https://millionrounds.com/company/abound-solar) Abound Solar was a thin-film solar module manufacturer based in Loveland, Colorado. *Founded* 2007 Loveland, United States **$510M** last round Dec 2010
- 47 [**Spiro**](https://millionrounds.com/company/spiro) *Founded* - Kenya **$508M** last round Sept 2026
- 48 [**Sedron Technologies** Sedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries.](https://millionrounds.com/company/sedron-technologies) Sedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries. *Founded* 2014 Sedro-Woolley, United States **$500M** last round May 2026
- 49 [**Pivot Energy** Pivot Energy is a national renewable energy provider that develops, finances, builds, owns, and manages solar and energy storage projects.](https://millionrounds.com/company/pivot-energy) Pivot Energy is a national renewable energy provider that develops, finances, builds, owns, and manages solar and energy storage projects. *Founded* 2009 Denver, United States **$500M** last round Oct 2026
- 50 [**Arevon** Arevon Energy is a renewable energy company that focuses on developing, acquiring, and managing large-scale renewable energy projects.](https://millionrounds.com/company/arevon) Arevon Energy is a renewable energy company that focuses on developing, acquiring, and managing large-scale renewable energy projects. *Founded* 2017 Scottsdale, United States **$482M** last round Mar 2026

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

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## More clean energy lists

[See all](https://millionrounds.com/top-lists?t=Clean%20energy)

[*S* *EP* *S* **Clean energy startups in Europe** 470 companies · $23B](https://millionrounds.com/top-lists/clean-energy-startups-europe)

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