Top list · Worldwide
Cleantech startups founded in 2021
83 cleantech startups founded in 2021 have raised money in rounds we track. These are the 50 that have raised the most, $3.7B between them, with the United States the most common home.
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1KOMMA5°1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas.1Komma5° is an electricity company offering free electricity to all electric vehicle owners financed through trading using GHG quotas.
Founded 2021Hamburg, Germany$563Mlast round Oct 2026 - 2
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$563Mlast round Sept 2026 - 3
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 - 4
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$280Mlast round Jun 2026 - 5
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 - 6
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 - 7
Inspiration MobilityInspiration is the first one-stop EV solutions company to both finance electric vehicles.Inspiration is the first one-stop EV solutions company to both finance electric vehicles.
Founded 2021Washington, United States$215Mlast round May 2022 - 8
AmpergiaAmpergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.
Founded 2021Milton Keynes, United Kingdom$168Mlast round Jan 2022 - 9
ICE Thermal HarvestingICE Thermal Harvesting focuses on supplying zero-emission power in various regions around the world.ICE Thermal Harvesting focuses on supplying zero-emission power in various regions around the world.
Founded 2021Houston, United States$150Mlast round Aug 2023 - 10
Cyclic MaterialsCyclic Materials is a cleantech company based in Kingston, Ontario, Canada, with a significant presence in Toronto.Cyclic Materials is a cleantech company based in Kingston, Ontario, Canada, with a significant presence in Toronto.
Founded 2021Toronto, Canada$150Mlast round Aug 2026 - 11
EV RealtyEV Realty is a privately held infrastructure development company founded in 2021 and based in San Francisco, California.EV Realty is a privately held infrastructure development company founded in 2021 and based in San Francisco, California.
Founded 2021San Francisco, United States$75Mlast round Sept 2025 - 12
Rabot EnergyRabot Energy is a smart energy and electricity provider based in Hamburg, founded in 2021.Rabot Energy is a smart energy and electricity provider based in Hamburg, founded in 2021.
Founded 2021Hamburg, Germany$50Mlast round Oct 2026 - 13
AtlanteAtlante is a developer of an electric vehicle charging network that is 100% grid-integrated and powered by renewables and energy storage.Atlante is a developer of an electric vehicle charging network that is 100% grid-integrated and powered by renewables and energy storage.
Founded 2021Milano, Italy$50Mlast round Sept 2023 - 14
GenominesGenomines is a deeptech and biotechnology startup based in Paris, France, with operations in Saclay.Genomines is a deeptech and biotechnology startup based in Paris, France, with operations in Saclay.
Founded 2021Paris, France$45Mlast round Sept 2025 - 15
Terraform IndustriesTerraform Industries is a bet on cheap solar, synthetic hydrocarbon supremacy, and hyperscale.Terraform Industries is a bet on cheap solar, synthetic hydrocarbon supremacy, and hyperscale.
Founded 2021Burbank, United States$44Mlast round Apr 2026 - 16
Helical FusionHelical Fusion Co., Ltd.Helical Fusion Co., Ltd.
Founded 2021Chuo City, Japan$43Mlast round Oct 2026 - 17
BasiGoBasiGo is a Kenyan electric bus company founded in 2021, headquartered in Nairobi.BasiGo is a Kenyan electric bus company founded in 2021, headquartered in Nairobi.
Founded 2021Nairobi, Kenya$42Mlast round Aug 2026 - 18
VÆRIDIONVÆRIDION is an aircraft manufacturer based in Munich, founded in 2021.VÆRIDION is an aircraft manufacturer based in Munich, founded in 2021.
Founded 2021Munich, Germany$34Mlast round Nov 2026 - 19
CeiboCeibo is a Chilean mining technology company based in Santiago, specializing in advanced chemical leaching technologies for copper extraction.Ceibo is a Chilean mining technology company based in Santiago, specializing in advanced chemical leaching technologies for copper extraction.
Founded 2021Santiago, Chile$30Mlast round Jun 2023 - 20
Perch EnergyPerch Energy offers clean energy technology, and services.Perch Energy offers clean energy technology, and services.
Founded 2021United States$30Mlast round Oct 2023 - 21
Hongdao New MaterialsHongdao New Materials is a technology-based company that specializes in the research and development.Hongdao New Materials is a technology-based company that specializes in the research and development.
Founded 2021Suzhou$27Mlast round Sept 2023 - 22
Trillium Renewable ChemicalsTrillium Renewable Chemicals manufactures chemicals from renewable feedstocks used in a variety of industrially important applications.Trillium Renewable Chemicals manufactures chemicals from renewable feedstocks used in a variety of industrially important applications.
Founded 2021Knoxville, United States$24Mlast round May 2026 - 23
OstromOstrom is a Berlin-based digital energy provider focused on making 100% renewable electricity accessible and affordable for households in Germany.Ostrom is a Berlin-based digital energy provider focused on making 100% renewable electricity accessible and affordable for households in Germany.
Founded 2021Berlin, Germany$23Mlast round Jun 2025 - 24
EmvolonEmvolon is a technology company that converts wasted resources into low-cost green fuelsEmvolon is a technology company that converts wasted resources into low-cost green fuels
Founded 2021Boston, United States$22Mlast round Oct 2026 - 25
NovoHydrogenNovoHydrogen is experienced at deploying and commercializing successful innovative energy transition technologies.NovoHydrogen is experienced at deploying and commercializing successful innovative energy transition technologies.
Founded 2021United States$20Mlast round Oct 2023 - 26
Spark Energy ServicesSpark Energy Services is an energy service finance company.Spark Energy Services is an energy service finance company.
Founded 2021Port Louis$19Mlast round Aug 2024 - 27
Zero HomesZero Homes is a technology company based in Denver, founded in 2021-2022.Zero Homes is a technology company based in Denver, founded in 2021-2022.
Founded 2021Denver, United States$17Mlast round Feb 2026 - 28
Johnson Energy StorageJohnson Energy Storage produces lithium-ion battery intended for use in electronics requiring reliable power and power storage.Johnson Energy Storage produces lithium-ion battery intended for use in electronics requiring reliable power and power storage.
Founded 2021Atlanta, United States$16Mlast round Oct 2024 - 29Rongke HydrogenRongke Hydrogen is a hydrogen fuel cell R&D company, mainly engaged in hydrogen fuel cell research, manufacturing, and sales.
Rongke Hydrogen is a hydrogen fuel cell R&D company, mainly engaged in hydrogen fuel cell research, manufacturing, and sales.
Founded 2021China$16Mlast round Nov 2021 - 30
ReonicReonic enables renewable energy installers to sell, design and install systems better and faster than ever before.Reonic enables renewable energy installers to sell, design and install systems better and faster than ever before.
Founded 2021Berlin, Germany$14Mlast round Sept 2024 - 31
UnblockUnblock is a climate technology company that offers a solution to mitigate emissions.Unblock is a climate technology company that offers a solution to mitigate emissions.
Founded 2021Grand Cayman, Cayman Islands$14Mlast round Jul 2025 - 32
ClimatiqClimatiq is a Berlin-based climate technology company founded in 2021, specializing in carbon intelligence as a Software-as-a-Service (SaaS) provider.Climatiq is a Berlin-based climate technology company founded in 2021, specializing in carbon intelligence as a Software-as-a-Service (SaaS) provider.
Founded 2021Berlin, Germany$12Mlast round Jun 2025 - 33
KwettaKwetta is a New Zealand-based company specializing in EV charging technology, founded in 2021 and headquartered in Napier.Kwetta is a New Zealand-based company specializing in EV charging technology, founded in 2021 and headquartered in Napier.
Founded 2021Napier, New Zealand$11Mlast round Jan 2025 - 34
SynopSynop is an enterprise software platform that specializes in optimizing electric vehicle (EV) fleet charging and energy management.Synop is an enterprise software platform that specializes in optimizing electric vehicle (EV) fleet charging and energy management.
Founded 2021New York, United States$10Mlast round Jun 2022 - 35
Green GravityGreen Gravity is an Australian clean technology company founded in 2021, based in North Wollongong, New South Wales.Green Gravity is an Australian clean technology company founded in 2021, based in North Wollongong, New South Wales.
Founded 2021Wollongong, Australia$9.0Mlast round Oct 2024 - 36
Renew RiskRenew Risk is a London-based InsurTech and FinTech company founded in 2021.Renew Risk is a London-based InsurTech and FinTech company founded in 2021.
Founded 2021London, United Kingdom$7.1Mlast round Feb 2025 - 37
Milvus AdvancedMilvus Advanced is a UK-based deeptech company located in Oxford, specializing in the production of high-performance nanomaterials.Milvus Advanced is a UK-based deeptech company located in Oxford, specializing in the production of high-performance nanomaterials.
Founded 2021Oxford, United Kingdom$6.9Mlast round Oct 2025 - 38
NewtraceNewtrace Private Limited is a climate-tech and deep-tech startup based in Bengaluru, Karnataka, India, founded in 2021.Newtrace Private Limited is a climate-tech and deep-tech startup based in Bengaluru, Karnataka, India, founded in 2021.
Founded 2021Bengaluru, India$6.2Mlast round Mar 2026 - 39
Go EveInnovations to accelerate the transition to EVs.Innovations to accelerate the transition to EVs.
Founded 2021United Kingdom$6.1Mlast round Oct 2026 - 40
Concrete4ChangeDeveloping novel technology for carbon sequestration into concreteDeveloping novel technology for carbon sequestration into concrete
Founded 2021Nottingham, United Kingdom$5.9Mlast round Nov 2023 - 41
Le FourgonLe Fourgon is a French sustainable e-commerce and delivery startup founded in April 2021.Le Fourgon is a French sustainable e-commerce and delivery startup founded in April 2021.
Founded 2021Wambrechies, France$5.9Mlast round Jan 2025 - 42
Nextron EnergiaNextron Energia is Brazil's first climate tech startup, founded in 2021 and based in São Paulo.Nextron Energia is Brazil's first climate tech startup, founded in 2021 and based in São Paulo.
Founded 2021Sao Paulo, Brazil$5.3Mlast round Mar 2024 - 43
Salinity SolutionsSalinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.
Founded 2021Birmingham, United Kingdom$5.1Mlast round Apr 2026 - 44
HgenHgen is a technology company that specializes in producing clean industrial gases, specifically hydrogen and oxygen, for heavy industry sectors such as chemicalHgen is a technology company that specializes in producing clean industrial gases, specifically hydrogen and oxygen, for heavy industry sectors such as chemical
Founded 2021Los Angeles, United States$5.0Mlast round Sept 2024 - 45
SkyfriSkyfri is a cleantech company that provides solar asset owners with a platform that automates operations, maintenance, and asset management.Skyfri is a cleantech company that provides solar asset owners with a platform that automates operations, maintenance, and asset management.
Founded 2021Oslo, Norway$5.0Mlast round Jul 2022 - 46
VoltpostVoltpost transforms lampposts into smart electric vehicle charging stations to make them accessible to people.Voltpost transforms lampposts into smart electric vehicle charging stations to make them accessible to people.
Founded 2021Brooklyn, United States$4.9Mlast round Mar 2026 - 47
ReefillaReefilla provides a mobile and predictive charging delivery service for electric vehicles.Reefilla provides a mobile and predictive charging delivery service for electric vehicles.
Founded 2021Turin, Italy$4.8Mlast round Dec 2024 - 48
Parallel CarbonParallel Carbon is a Manchester-based climate technology company founded in 2021.Parallel Carbon is a Manchester-based climate technology company founded in 2021.
Founded 2021Manchester, United Kingdom$3.8Mlast round Jan 2024 - 49
Allegro EnergyAllegro Energy is a developer of energy storage technology focus on sustainable solutions for a zero carbon economy.Allegro Energy is a developer of energy storage technology focus on sustainable solutions for a zero carbon economy.
Founded 2021Newcastle, Australia$3.5Mlast round Jul 2025 - 50
Kumulus WaterKumulus Water is a French-Tunisian GreenTech startup founded in 2021, focused on providing sustainable access to clean drinking water.Kumulus Water is a French-Tunisian GreenTech startup founded in 2021, focused on providing sustainable access to clean drinking water.
Founded 2021Paris, France$3.4Mlast round May 2025
Hamburg, Germany
Paris, United Kingdom
Portland, United States
Halifax, Canada
Milano, Italy
Paris, France
Chuo City, Japan
Nairobi, Kenya
Santiago, Chile
China
Grand Cayman, Cayman Islands
Napier, New Zealand
Wollongong, Australia
Bengaluru, India
Sao Paulo, Brazil
Oslo, NorwayCompanies founded in 2021 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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C
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ECleantech startups in the United States480 companies · $50BCAR
SCleantech startups that raised in 2026276 companies · $37B in 2026
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OECleantech startups in the United Kingdom156 companies · $8.9BCAR
FECleantech startups in the United States that raised in 2026108 companies · $31B in 2026
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GFEFCleantech startups in Canada88 companies · $2.4B
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ECleantech startups founded in 202076 companies · $8.3B
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PCCleantech startups founded in 201970 companies · $4.5B
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SECleantech startups founded in 202268 companies · $3.7BMore lists worldwide
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RPHealth startups worldwide12,811 companies · $81B
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XAI startups worldwide10,238 companies · $830BGVVRPBiotech startups worldwide7,127 companies · $70B
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FTBig data startups worldwide3,812 companies · $220BAF
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SFintech startups worldwide3,200 companies · $94BOABAI startups that raised in 20262,922 companies · $540B in 2026FT
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PEnergy providers startups worldwide2,808 companies · $152B
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OMarketing tech startups worldwide2,728 companies · $28B