Top list · Worldwide · 2026
Cleantech startups that raised in 2026
276 cleantech startups that raised in 2026 have raised money in rounds we track in 2026. These are the 50 that raised the most, $37B between them, with the United States the most common home.
- 1
CrusoeCrusoe is an energy-first AI infrastructure company that develops and operates large-scale, AI-optimized data centers powered by clean energy sources.Crusoe is an energy-first AI infrastructure company that develops and operates large-scale, AI-optimized data centers powered by clean energy sources.
Founded 2018Denver, United States$7.2Blast round Sept 2026 - 2
Atlas Renewable EnergyAtlas Renewable Energy is a renewable energy company that develops, builds, and operates solar and wind projects.Atlas Renewable Energy is a renewable energy company that develops, builds, and operates solar and wind projects.
Founded 2017Miami, United States$3.1Blast round Apr 2026 - 3
StegraStegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy.Stegra operates a steel production plant to accelerate the decarbonization of the steel industry using green energy.
Founded 2020Stockholm, Sweden$1.6Blast round Apr 2026 - 4
Form EnergyForm Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration.Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration.
Founded 2017Somerville, United States$1.5Blast round Sept 2026 - 5
Kyoto FusioneeringKyoto Fusioneering Ltd.Kyoto Fusioneering Ltd.
Founded 2019Chiyoda, Japan$1.3Blast round Aug 2026 - 6Dimension EnergyFounded -United States$1.3Blast round Aug 2026
- 7
X-energyX-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.
Founded 2009Rockville, United States$1.0Blast round May 2026 - 8Base PowerFounded -United States$1.0Blast round Aug 2026
- 9Commonwealth Fusion SystemsFounded -United States$1.0Blast round Jul 2026
- 10
SB EnergySB Energy provides renewable energy at scale, accelerating the global energy transition.SB Energy provides renewable energy at scale, accelerating the global energy transition.
Founded 2015Redwood City, United States$1.0Blast round Jan 2026 - 11ReturnFounded -Netherlands$936Mlast round Nov 2026
- 12
CuspAICuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.CuspAI is an innovative artificial intelligence company based in Cambridge, United Kingdom, with additional teams in Amsterdam and Berlin.
Founded 2024Cambridge, United Kingdom$850Mlast round Jul 2026 - 13
EnergyReEnergyRe is at the center of the clean energy future.EnergyRe is at the center of the clean energy future.
Founded 2020New York, United States$815Mlast round Oct 2026 - 14
Panamint CapitalPanamint Capital is an energy investment firm that focuses on developing electric transmission and optimizing power generation.Panamint Capital is an energy investment firm that focuses on developing electric transmission and optimizing power generation.
Founded 2019United States$769Mlast round Nov 2026 - 15
Blue EnergyBlue Energy is a nuclear energy company that designs and manufactures modular nuclear power plants.Blue Energy is a nuclear energy company that designs and manufactures modular nuclear power plants.
Founded -Plainfield, United States$760Mlast round Jul 2026 - 16
Maxwell PowerMaxwell Power is a renewable energy company that installs solar panels.Maxwell Power is a renewable energy company that installs solar panels.
Founded -San Diego, United States$750Mlast round Jun 2026 - 17
Solar LandscapeSolar Landscape is an installer and operator of solar energy systems.Solar Landscape is an installer and operator of solar energy systems.
Founded 2012Asbury Park, United States$725Mlast round Jun 2026 - 18
rPlus EnergiesrPlus Energies builds new power plants to help rebuild America's energy infrastructure.rPlus Energies builds new power plants to help rebuild America's energy infrastructure.
Founded 2018Salt Lake City, United States$650Mlast round Mar 2026 - 19
ILOS ProjectsILOS Projects is a Independent Power Producer.ILOS Projects is a Independent Power Producer.
Founded 2018Karlsruhe, Germany$530Mlast round Apr 2026 - 20
Sedron TechnologiesSedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries.Sedron Technologies is a private environmental services company based in Sedro-Woolley, Washington, founded in 2014 as a spinoff from Janicki Industries.
Founded 2014Sedro-Woolley, United States$500Mlast round May 2026 - 21
Pivot EnergyPivot Energy is a national renewable energy provider that develops, finances, builds, owns, and manages solar and energy storage projects.Pivot Energy is a national renewable energy provider that develops, finances, builds, owns, and manages solar and energy storage projects.
Founded 2009Denver, United States$500Mlast round Oct 2026 - 22
ArevonArevon Energy is a renewable energy company that focuses on developing, acquiring, and managing large-scale renewable energy projects.Arevon Energy is a renewable energy company that focuses on developing, acquiring, and managing large-scale renewable energy projects.
Founded 2017Scottsdale, United States$482Mlast round Mar 2026 - 23
Proxima FusionProxima 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.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 2023Munich, Germany$468Mlast round Jul 2026 - 24
HelionHelion incorporated in 2009 and is now functioning as an R&D/thinktank company providing intellectual services with an emphasis on artificial intelligence, mathHelion incorporated in 2009 and is now functioning as an R&D/thinktank company providing intellectual services with an emphasis on artificial intelligence, math
Founded -Salt Lake City, UT, United States$465Mlast round Jun 2026 - 25
Spearmint EnergySpearmint Energy is a merchant energy trading company founded to combine innovative financial solutions.Spearmint Energy is a merchant energy trading company founded to combine innovative financial solutions.
Founded 2022Miami, United States$450Mlast round May 2026 - 26
Fervo EnergyFervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems.Fervo Energy develops clean energy technology to generate carbon-free energy from geothermal systems.
Founded 2017Houston, United States$441Mlast round Sept 2026 - 27
NineDot EnergyNineDot Energy develops battery storage sites and other energy solutions.NineDot Energy develops battery storage sites and other energy solutions.
Founded 2015New York, United States$431Mlast round Feb 2026 - 28
Redwood MaterialsRedwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries.Redwood Materials is an American company based in Carson City, Nevada, focused on creating a sustainable supply chain for lithium-ion batteries.
Founded 2017Carson City, United States$425Mlast round Jan 2026 - 29
Rezolv EnergyRezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic.Rezolv Energy is an independent power producer and renewable energy developer based in Prague, Czech Republic.
Founded 2022Prague, Romania$410Mlast round Nov 2026 - 30SpiroFounded -Kenya$408Mlast round Sept 2026
- 31
Whysol RenewablesWhysol Renewables is an Italian independent power producer focused on renewable energy and energy transition projects.Whysol Renewables is an Italian independent power producer focused on renewable energy and energy transition projects.
Founded -Italy, United States$368Mlast round Mar 2026 - 32
PanthalassaPanthalassa is a public-benefit corporation based in Portland, Oregon, founded in 2016.Panthalassa is a public-benefit corporation based in Portland, Oregon, founded in 2016.
Founded 2021Portland, United States$365Mlast round Aug 2026 - 33
Radial PowerRadial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners.Radial Power provides distributed energy and sustainability solutions to commercial and industrial real estate asset owners.
Founded 2022Houston, United States$355Mlast round Jan 2026 - 34
ZelestraAt Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.
Founded 2005Spain, Spain$350Mlast round Oct 2026 - 35
Lunar EnergyLunar Energy is a renewable energy company based in Mountain View, California, founded in 2020.Lunar Energy is a renewable energy company based in Mountain View, California, founded in 2020.
Founded 2020Mountain View, United States$334Mlast round Feb 2026 - 36
NewcleoNewcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.Newcleo is an atomic energy company that focuses on developing advanced nuclear energy technologies.
Founded 2021Paris, United Kingdom$305Mlast round Sept 2026 - 37
AvantusAvantus develops large-scale solar and solar-plus-storage projects to drive the adoption of zero-emission energy.Avantus develops large-scale solar and solar-plus-storage projects to drive the adoption of zero-emission energy.
Founded 2019El Dorado Hills, United States$300Mlast round Sept 2026 - 38
EnerVenueEnerVenue is an energy storage infrastructure company based in Fremont, California, founded in 2020.EnerVenue is an energy storage infrastructure company based in Fremont, California, founded in 2020.
Founded 2020Fremont, United States$300Mlast round Mar 2026 - 39
CleanCapitalCleanCapital accelerates clean energy with an online marketplace providing opportunities for investors and access to capital for developers.CleanCapital accelerates clean energy with an online marketplace providing opportunities for investors and access to capital for developers.
Founded 2015New York, United States$300Mlast round Jan 2026 - 40
Neogenyx FuelsNeogenyx Fuels develops, owns, and operates advanced biofuel and renewable natural gas infrastructure projects.Neogenyx Fuels develops, owns, and operates advanced biofuel and renewable natural gas infrastructure projects.
Founded -Framingham, United States$300Mlast round May 2026 - 41
GIGA StorageGIGA Storage develops large-scale sustainable energy storage systems.GIGA Storage develops large-scale sustainable energy storage systems.
Founded 2018Amstelveen, Netherlands$291Mlast round Oct 2026 - 42
Generate CapitalGenerate Capital is an investment and operating platform for sustainable infrastructure.Generate Capital is an investment and operating platform for sustainable infrastructure.
Founded 2014San Francisco, United States$272Mlast round Sept 2026 - 43FeverFounded -Sweden$250Mlast round Sept 2026
- 44
Focused EnergyFocused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF).Focused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF).
Founded 2021Darmstadt, Germany$240Mlast round Jun 2026 - 45
EverWind FuelsEverWind Fuels developing new solar and wind farms to produce green hydrogen.EverWind Fuels developing new solar and wind farms to produce green hydrogen.
Founded 2021Halifax, Canada$234Mlast round Jan 2026 - 46
Svea SolarSvea Solar is digitalising energy.Svea Solar is digitalising energy.
Founded -Sollentuna, Sweden$216Mlast round Jun 2026 - 47
Aspen PowerAspen Power Partners is a distributed generation platform with the dual mission of accelerating and democratizing decarbonization.Aspen Power Partners is a distributed generation platform with the dual mission of accelerating and democratizing decarbonization.
Founded 2020New York, United States$200Mlast round Jan 2026 - 48
RenewReNew is offering services on senior citizens.ReNew is offering services on senior citizens.
Founded 2017Toledo, United States$195Mlast round Oct 2026 - 49terralayrFounded -Switzerland$190Mlast round Jan 2026
- 50
Simple EnergySimple Energy is a business consulting company that provides advice for energy generators and consumers.Simple Energy is a business consulting company that provides advice for energy generators and consumers.
Founded 2012São Paulo, United States$180Mlast round Sept 2026
Denver, United States
Stockholm, Sweden
Chiyoda, Japan
Netherlands
Cambridge, United Kingdom
Karlsruhe, Germany
Prague, Romania
Kenya
Spain, Spain
Halifax, Canada
SwitzerlandCompanies with a round in 2026 that we track, ranked by what they raised this year. Nobody pays to be on a list.
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