Top list · United States
Climate Tech startups in the United States
270 climate Tech startups in the United States have raised money in rounds we track. These are the 50 that have raised the most, $27B between them, with Houston the most common home.
- 1
Venture GlobalVenture Global is a supplier of home, office, and stationery products.Venture Global is a supplier of home, office, and stationery products.
Founded 2013Washington, United States$10Blast round Jun 2026 - 2Commonwealth Fusion SystemsFounded -United States$1.9Blast round Jul 2026
- 3SILAFounded -United States$1.7Blast round Aug 2026
- 4
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$1.2Blast round Jan 2026 - 5
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$1.1Blast round Sept 2026 - 6
Pacific FusionPacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.Pacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.
Founded 1997Fremont, United States$900Mlast round Nov 2024 - 7
FootprintFootprint is a materials science technology company that designs, develops, and manufactures solutions to replace single-use plastics.Footprint is a materials science technology company that designs, develops, and manufactures solutions to replace single-use plastics.
Founded 2013Gilbert, United States$843Mlast round May 2024 - 8
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$660Mlast round Jan 2026 - 9
WildFire EnergyWildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprieWildfire Energy is an Australian cleantech startup focused on converting residual waste into renewable energy, hydrogen, and sustainable fuels using its proprie
Founded 2016Petrie Terrace, United States$604Mlast round Jul 2026 - 10
1PointFive1PointFive is a multi-solution platform for Carbon Capture, Utilization and Sequestration (CCUS) that provides decarbonization solutions.1PointFive is a multi-solution platform for Carbon Capture, Utilization and Sequestration (CCUS) that provides decarbonization solutions.
Founded 2020Houston, United States$500Mlast round Sept 2024 - 11
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 - 12
Trace MidstreamTrace Midstream focuses on the development of carbon capture and sequestration projects.Trace Midstream focuses on the development of carbon capture and sequestration projects.
Founded 2018Houston, United States$400Mlast round Sept 2022 - 13
Colossal BiosciencesColossal Biosciences is an American biotechnology and genetic engineering company founded in September 2021, recognized as the world's first dedicated de-extincColossal Biosciences is an American biotechnology and genetic engineering company founded in September 2021, recognized as the world's first dedicated de-extinc
Founded 2021Dallas, United States$380Mlast round Feb 2026 - 14
Nature's FyndNature's Fynd is a Chicago-based food-tech company that specializes in creating animal-free meat and dairy alternatives.Nature's Fynd is a Chicago-based food-tech company that specializes in creating animal-free meat and dairy alternatives.
Founded 2012Chicago, United States$350Mlast round Jul 2021 - 15
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 - 16
GridPointGridPoint is a clean technology company based in Reston, Virginia, founded in 2003.GridPoint is a clean technology company based in Reston, Virginia, founded in 2003.
Founded 2003Reston, United States$331Mlast round Jul 2014 - 17Radiant NuclearFounded -United States$300Mlast round Dec 2025
- 18
Summit Carbon SolutionsSummit Carbon Solutions (SCS) is a U.S.-based decarbonization platform headquartered in Ames, Iowa.Summit Carbon Solutions (SCS) is a U.S.-based decarbonization platform headquartered in Ames, Iowa.
Founded 2021Ames, United States$300Mlast round May 2022 - 19
Muon SpaceMuon Space is an American aerospace startup founded in 2021, based in Mountain View, California.Muon Space is an American aerospace startup founded in 2021, based in Mountain View, California.
Founded 2021Mountain View, United States$295Mlast round Aug 2026 - 20HelioVoltHelioVolt Corporation manufactures thin-film solar modules for commercial rooftop.
HelioVolt Corporation manufactures thin-film solar modules for commercial rooftop.
Founded 2001Austin, United States$253Mlast round Aug 2013 - 21
Chestnut CarbonChestnut Carbon is an environmental engineering company that offers carbon removal and project development services.Chestnut Carbon is an environmental engineering company that offers carbon removal and project development services.
Founded 2021New York, United States$250Mlast round Sept 2025 - 22
Heron PowerHeron Power is an energy infrastructure company based in Scotts Valley, California, founded in 2024 by Drew Baglino, a former Tesla executive.Heron Power is an energy infrastructure company based in Scotts Valley, California, founded in 2024 by Drew Baglino, a former Tesla executive.
Founded 2024Scotts Valley, United States$238Mlast round Sept 2026 - 23
TemperPackTemperPack manufactures insulated packaging solutions that meet the needs of all industries that ship perishable items.TemperPack manufactures insulated packaging solutions that meet the needs of all industries that ship perishable items.
Founded 2015Richmond, United States$208Mlast round Mar 2022 - 24
Harvestone GroupHarvestone Group specializes in marketing, supply chain management, production, storing, distributing and trading services.Harvestone Group specializes in marketing, supply chain management, production, storing, distributing and trading services.
Founded 2018Franklin, United States$205Mlast round Sept 2024 - 25HeirloomFounded -United States$203Mlast round Feb 2025
- 26
TurnTurn is an IT technology development company that offers web development, CRM, and mobile app development services.Turn is an IT technology development company that offers web development, CRM, and mobile app development services.
Founded 2016United States$172Mlast round Sept 2022 - 27
Great Lakes ReNEWGreat Lakes ReNEW is a partnership of more than 50 institutions, including universities, technology firms, and government.Great Lakes ReNEW is a partnership of more than 50 institutions, including universities, technology firms, and government.
Founded 2016Chicago, United States$160Mlast round Jan 2024 - 28
Furie Operating AlaskaAn oil & gas company which plans to install an offshore natural gas production platform in AlaskaAn oil & gas company which plans to install an offshore natural gas production platform in Alaska
Founded 2013Anchorage, United States$160Mlast round Jul 2014 - 29
AMP RoboticsAMP offers AI-powered waste sorting solutions to automate recovery and reduce labor.AMP offers AI-powered waste sorting solutions to automate recovery and reduce labor.
Founded -United States$160Mlast round Jun 2026 - 30
SentrySentry is a developer-first software company that specializes in open-source error tracking and application monitoring.Sentry is a developer-first software company that specializes in open-source error tracking and application monitoring.
Founded 2011San Francisco, United States$155Mlast round Apr 2024 - 31
Skyven TechnologiesSkyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat.Skyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat.
Founded 2013Farmers Branch, United States$145Mlast round Jan 2026 - 32
Standard NuclearStandard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications.Standard Nuclear manufactures advanced nuclear fuel for next-generation reactors and high-temperature applications.
Founded -Oak Ridge, United States$140Mlast round Jan 2026 - 33
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$126Mlast round Sept 2026 - 34
AmogyAmogy Inc.Amogy Inc.
Founded 2020New York, United States$125Mlast round Oct 2026 - 35Terra CO2Founded -United States$125Mlast round Jul 2025
- 36
Thea EnergyThea Energy is a fusion energy startup focused on commercializing scalable and zero-emission power through advanced stellarator technology.Thea Energy is a fusion energy startup focused on commercializing scalable and zero-emission power through advanced stellarator technology.
Founded 2022Kearny, United States$120Mlast round Jul 2026 - 37
TwelveTwelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship.Twelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship.
Founded 2007Utrecht, United States$117Mlast round Sept 2026 - 38
StandDiscrete Safety Jewellery For Peace Of MindDiscrete Safety Jewellery For Peace Of Mind
Founded 2019United States$105Mlast round Oct 2026 - 39
Aalo AtomicsAalo Atomics manufactures and develops nuclear power plants for clean energy production.Aalo Atomics manufactures and develops nuclear power plants for clean energy production.
Founded 2023Dickinson, United States$103Mlast round Oct 2025 - 40
Upwell WaterUpwell Water LLC is a San Francisco-based specialty finance company focused on creating a sustainable water future.Upwell Water LLC is a San Francisco-based specialty finance company focused on creating a sustainable water future.
Founded 2014San Francisco, United States$100Mlast round Jul 2024 - 41
Noble EnvironmentalNoble Environmental is an environmental service provider offering solid waste management for renewable natural gas.Noble Environmental is an environmental service provider offering solid waste management for renewable natural gas.
Founded 2016Uniontown, United States$100Mlast round Sept 2025 - 42TurnTideTurnTide is an anti-spam technology company based in Pennsylvania.
TurnTide is an anti-spam technology company based in Pennsylvania.
Founded 2003United States$100Mlast round Sept 2020 - 43
Last EnergyLast Energy is an American company focused on developing next-generation micro-modular nuclear power plants.Last Energy is an American company focused on developing next-generation micro-modular nuclear power plants.
Founded 2019Austin, United States$100Mlast round Dec 2025 - 44EnergyXFounded -United States$97Mlast round Jan 2025
- 45
Project OmegaProject Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island.Project Omega is a nuclear technology startup founded in 2026 and headquartered in Rhode Island.
Founded 2025Washington, United States$92Mlast round Nov 2026 - 46
TerradotTerradot is a climate technology company founded in 2022 at Stanford University, focused on developing Enhanced Rock Weathering (ERW) solutions to remove carbonTerradot is a climate technology company founded in 2022 at Stanford University, focused on developing Enhanced Rock Weathering (ERW) solutions to remove carbon
Founded 2022San Francisco, United States$92Mlast round Oct 2026 - 47
Mitra ChemMitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California.Mitra Chem is an AI-native manufacturer of lithium-ion battery materials, founded in 2021 and headquartered in Mountain View, California.
Founded 2021Mountain View, United States$91Mlast round Jun 2025 - 48
Imperative GlobalImperative Global is an environmental consulting company that provides carbon offset and environmental asset projects.Imperative Global is an environmental consulting company that provides carbon offset and environmental asset projects.
Founded -Houston, United States$91Mlast round Apr 2026 - 49
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 - 50
CircCirc® is a textile-to-textile recycling innovator based in Danville, Virginia, founded in 2011.Circ® is a textile-to-textile recycling innovator based in Danville, Virginia, founded in 2011.
Founded 2011Danville, United States$88Mlast round Mar 2023
Washington, United StatesCompanies whose funding rounds we classed in this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.
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