Top list · United States · 2026
Cleantech startups in the United States that raised in 2026
108 cleantech startups in the United States that raised in 2026 have raised money in rounds we track in 2026. These are the 50 that raised the most, $31B between them, with New York 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
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 - 4Dimension EnergyFounded -United States$1.3Blast round Aug 2026
- 5
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 - 6Base PowerFounded -United States$1.0Blast round Aug 2026
- 7Commonwealth Fusion SystemsFounded -United States$1.0Blast round Jul 2026
- 8
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 - 9
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 - 10
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 - 11
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 - 12
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 - 13
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 - 14
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 - 15
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 - 16
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 - 17
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 - 18
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 - 19
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 - 20
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 - 21
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 - 22
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 - 23
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 - 24
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 - 25
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 - 26
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 - 27
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 - 28
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 - 29
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 - 30
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 - 31
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 - 32
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 - 33
RenewReNew is offering services on senior citizens.ReNew is offering services on senior citizens.
Founded 2017Toledo, United States$195Mlast round Oct 2026 - 34
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 - 35
NexampNexamp provides renewable energy services designed to minimize energy expenses and carbon emissions.Nexamp provides renewable energy services designed to minimize energy expenses and carbon emissions.
Founded 2007Boston, United States$180Mlast round Apr 2026 - 36
Quaise EnergyQuaise Energy is a technology company founded in 2018, originating from the MIT Plasma Science and Fusion Center.Quaise Energy is a technology company founded in 2018, originating from the MIT Plasma Science and Fusion Center.
Founded 2018Houston, United States$159Mlast round Sept 2026 - 37
Pathway PowerPathway Power is a utility-scale solar and battery storage developer building a renewable energy value chain.Pathway Power is a utility-scale solar and battery storage developer building a renewable energy value chain.
Founded 2022San Diego, United States$150Mlast round Jun 2026 - 38
Terawatt InfrastructureTeraWatt Infrastructure operates an electric vehicle charging infrastructure for medium and heavy-duty transport and fleets.TeraWatt Infrastructure operates an electric vehicle charging infrastructure for medium and heavy-duty transport and fleets.
Founded 2018San Francisco, United States$150Mlast round Jun 2026 - 39
Mazama EnergyMazama Energy is a geothermal developer founded in March 2023 and based in Frisco, Texas, with a corporate office in Plano.Mazama Energy is a geothermal developer founded in March 2023 and based in Frisco, Texas, with a corporate office in Plano.
Founded 2023Frisco, United States$135Mlast round Sept 2026 - 40
OCI EnergyOCI Energy develops solar and battery projects and provides EPC, O&M, and PPA support for commercial and utility clientsOCI Energy develops solar and battery projects and provides EPC, O&M, and PPA support for commercial and utility clients
Founded 2011San Antonio, United States$130Mlast round Jun 2026 - 41
TARTransformative American Resources (TAR) is an American energy infrastructure company.Transformative American Resources (TAR) is an American energy infrastructure company.
Founded -Austin, United States$120Mlast round Sept 2026 - 42
Peak EnergyPeak Energy is a charging application for electric vehicles.Peak Energy is a charging application for electric vehicles.
Founded 2022United States$108Mlast round Oct 2026 - 43
RainmakerRainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet.Rainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet.
Founded 2022New York, United States$100Mlast round Sept 2026 - 44
Orange EVOrange EV manufactures and sells heavy-duty industrial electric vehicles.Orange EV manufactures and sells heavy-duty industrial electric vehicles.
Founded 2012Kansas City, United States$100Mlast round Aug 2026 - 45
Type One EnergyStellarator technology to transform energy markets with fusion power.Stellarator technology to transform energy markets with fusion power.
Founded 2019Knoxville, United States$88Mlast round Sept 2026 - 46
CleanChoice EnergyCleanChoice Energy is a clean energy supplier whose mission is to make 100% renewable energy available to everyone.CleanChoice Energy is a clean energy supplier whose mission is to make 100% renewable energy available to everyone.
Founded 2011Washington, United States$85Mlast round Oct 2026 - 47
Deep FissionDeep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep.Deep Fission is transforming the energy landscape by installing modular nuclear power reactors a mile deep.
Founded -Berkeley, United States$80Mlast round Feb 2026 - 48
ArtemisArtemis operates an intelligence platform for indoor farms.Artemis operates an intelligence platform for indoor farms.
Founded 2015United States$77Mlast round Aug 2026 - 49
Bluecore EnergyBluecore Energy designs and builds compact, zero-emission small modular nuclear reactors on floating barges.Bluecore Energy designs and builds compact, zero-emission small modular nuclear reactors on floating barges.
Founded -Long Beach, United States$69Mlast round Sept 2026 - 50
LanzaJetLanzaJet is a private company founded in 2020 that focuses on sustainable fuels technology.LanzaJet is a private company founded in 2020 that focuses on sustainable fuels technology.
Founded 2020Chicago, United States$67Mlast round Oct 2026
Denver, United StatesCompanies 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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