# Top 50 Cleantech Startups Founded in 2021 by Funding (2026)

> The 50 best-funded cleantech startups founded in 2021, ranked by total funding raised: $3.7B combined.

Source: https://millionrounds.com/top-lists/cleantech-startups-founded-2021 (Millionrounds; every figure on the page links to its filing or article)

- 1 [**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
- 2 [**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
- 3 [**Panthalassa** Panthalassa is a public-benefit corporation based in Portland, Oregon, founded in 2016.](https://millionrounds.com/company/panthalassa) Panthalassa is a public-benefit corporation based in Portland, Oregon, founded in 2016. *Founded* 2021 Portland, United States **$365M** last round Aug 2026
- 4 [**Focused Energy** Focused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF).](https://millionrounds.com/company/focused-energy) Focused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF). *Founded* 2021 Darmstadt, Germany **$280M** last round Jun 2026
- 5 [**Chestnut Carbon** Chestnut Carbon is an environmental engineering company that offers carbon removal and project development services.](https://millionrounds.com/company/chestnut-carbon) Chestnut Carbon is an environmental engineering company that offers carbon removal and project development services. *Founded* 2021 New York, United States **$250M** last round Sept 2025
- 6 [**EverWind Fuels** EverWind Fuels developing new solar and wind farms to produce green hydrogen.](https://millionrounds.com/company/everwind-fuels) EverWind Fuels developing new solar and wind farms to produce green hydrogen. *Founded* 2021 Halifax, Canada **$234M** last round Jan 2026
- 7 [**Inspiration Mobility** Inspiration is the first one-stop EV solutions company to both finance electric vehicles.](https://millionrounds.com/company/inspiration-mobility) Inspiration is the first one-stop EV solutions company to both finance electric vehicles. *Founded* 2021 Washington, United States **$215M** last round May 2022
- 8 [**Ampergia** Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali.](https://millionrounds.com/company/ampergia) Ampergia Limited is a UK-based renewable energy company founded in 2021 by Sandip Sali. *Founded* 2021 Milton Keynes, United Kingdom **$168M** last round Jan 2022
- 9 [**ICE Thermal Harvesting** ICE Thermal Harvesting focuses on supplying zero-emission power in various regions around the world.](https://millionrounds.com/company/ice-thermal-harvesting) ICE Thermal Harvesting focuses on supplying zero-emission power in various regions around the world. *Founded* 2021 Houston, United States **$150M** last round Aug 2023
- 10 [**Cyclic Materials** Cyclic Materials is a cleantech company based in Kingston, Ontario, Canada, with a significant presence in Toronto.](https://millionrounds.com/company/cyclic-materials) Cyclic Materials is a cleantech company based in Kingston, Ontario, Canada, with a significant presence in Toronto. *Founded* 2021 Toronto, Canada **$150M** last round Aug 2026
- 11 [**EV Realty** EV Realty is a privately held infrastructure development company founded in 2021 and based in San Francisco, California.](https://millionrounds.com/company/ev-realty) EV Realty is a privately held infrastructure development company founded in 2021 and based in San Francisco, California. *Founded* 2021 San Francisco, United States **$75M** last round Sept 2025
- 12 [**Rabot Energy** Rabot Energy is a smart energy and electricity provider based in Hamburg, founded in 2021.](https://millionrounds.com/company/rabot-energy) Rabot Energy is a smart energy and electricity provider based in Hamburg, founded in 2021. *Founded* 2021 Hamburg, Germany **$50M** last round Oct 2026
- 13 [**Atlante** Atlante is a developer of an electric vehicle charging network that is 100% grid-integrated and powered by renewables and energy storage.](https://millionrounds.com/company/atlante) Atlante is a developer of an electric vehicle charging network that is 100% grid-integrated and powered by renewables and energy storage. *Founded* 2021 Milano, Italy **$50M** last round Sept 2023
- 14 [**Genomines** Genomines is a deeptech and biotechnology startup based in Paris, France, with operations in Saclay.](https://millionrounds.com/company/genomines) Genomines is a deeptech and biotechnology startup based in Paris, France, with operations in Saclay. *Founded* 2021 Paris, France **$45M** last round Sept 2025
- 15 [**Terraform Industries** Terraform Industries is a bet on cheap solar, synthetic hydrocarbon supremacy, and hyperscale.](https://millionrounds.com/company/terraform-industries) Terraform Industries is a bet on cheap solar, synthetic hydrocarbon supremacy, and hyperscale. *Founded* 2021 Burbank, United States **$44M** last round Apr 2026
- 16 [**Helical Fusion** Helical Fusion Co., Ltd.](https://millionrounds.com/company/helical-fusion) Helical Fusion Co., Ltd. *Founded* 2021 Chuo City, Japan **$43M** last round Oct 2026
- 17 [**BasiGo** BasiGo is a Kenyan electric bus company founded in 2021, headquartered in Nairobi.](https://millionrounds.com/company/basigo) BasiGo is a Kenyan electric bus company founded in 2021, headquartered in Nairobi. *Founded* 2021 Nairobi, Kenya **$42M** last round Aug 2026
- 18 [**VÆRIDION** VÆRIDION is an aircraft manufacturer based in Munich, founded in 2021.](https://millionrounds.com/company/v-ridion) VÆRIDION is an aircraft manufacturer based in Munich, founded in 2021. *Founded* 2021 Munich, Germany **$34M** last round Nov 2026
- 19 [**Ceibo** Ceibo is a Chilean mining technology company based in Santiago, specializing in advanced chemical leaching technologies for copper extraction.](https://millionrounds.com/company/ceibo) Ceibo is a Chilean mining technology company based in Santiago, specializing in advanced chemical leaching technologies for copper extraction. *Founded* 2021 Santiago, Chile **$30M** last round Jun 2023
- 20 [**Perch Energy** Perch Energy offers clean energy technology, and services.](https://millionrounds.com/company/perch-energy) Perch Energy offers clean energy technology, and services. *Founded* 2021 United States **$30M** last round Oct 2023
- 21 [**Hongdao New Materials** Hongdao New Materials is a technology-based company that specializes in the research and development.](https://millionrounds.com/company/hongdao-new-materials) Hongdao New Materials is a technology-based company that specializes in the research and development. *Founded* 2021 Suzhou **$27M** last round Sept 2023
- 22 [**Trillium Renewable Chemicals** Trillium Renewable Chemicals manufactures chemicals from renewable feedstocks used in a variety of industrially important applications.](https://millionrounds.com/company/trillium-renewable-chemicals) Trillium Renewable Chemicals manufactures chemicals from renewable feedstocks used in a variety of industrially important applications. *Founded* 2021 Knoxville, United States **$24M** last round May 2026
- 23 [**Ostrom** Ostrom is a Berlin-based digital energy provider focused on making 100% renewable electricity accessible and affordable for households in Germany.](https://millionrounds.com/company/ostrom) Ostrom is a Berlin-based digital energy provider focused on making 100% renewable electricity accessible and affordable for households in Germany. *Founded* 2021 Berlin, Germany **$23M** last round Jun 2025
- 24 [**Emvolon** Emvolon is a technology company that converts wasted resources into low-cost green fuels](https://millionrounds.com/company/emvolon) Emvolon is a technology company that converts wasted resources into low-cost green fuels *Founded* 2021 Boston, United States **$22M** last round Oct 2026
- 25 [**NovoHydrogen** NovoHydrogen is experienced at deploying and commercializing successful innovative energy transition technologies.](https://millionrounds.com/company/novohydrogen) NovoHydrogen is experienced at deploying and commercializing successful innovative energy transition technologies. *Founded* 2021 United States **$20M** last round Oct 2023
- 26 [**Spark Energy Services** Spark Energy Services is an energy service finance company.](https://millionrounds.com/company/spark-energy-services) Spark Energy Services is an energy service finance company. *Founded* 2021 Port Louis **$19M** last round Aug 2024
- 27 [**Zero Homes** Zero Homes is a technology company based in Denver, founded in 2021-2022.](https://millionrounds.com/company/zero-homes) Zero Homes is a technology company based in Denver, founded in 2021-2022. *Founded* 2021 Denver, United States **$17M** last round Feb 2026
- 28 [**Johnson Energy Storage** Johnson Energy Storage produces lithium-ion battery intended for use in electronics requiring reliable power and power storage.](https://millionrounds.com/company/johnson-energy-storage) Johnson Energy Storage produces lithium-ion battery intended for use in electronics requiring reliable power and power storage. *Founded* 2021 Atlanta, United States **$16M** last round Oct 2024
- 29 [**Rongke Hydrogen** Rongke Hydrogen is a hydrogen fuel cell R&D company, mainly engaged in hydrogen fuel cell research, manufacturing, and sales.](https://millionrounds.com/company/rongke-hydrogen) Rongke Hydrogen is a hydrogen fuel cell R&D company, mainly engaged in hydrogen fuel cell research, manufacturing, and sales. *Founded* 2021 China **$16M** last round Nov 2021
- 30 [**Reonic** Reonic enables renewable energy installers to sell, design and install systems better and faster than ever before.](https://millionrounds.com/company/reonic) Reonic enables renewable energy installers to sell, design and install systems better and faster than ever before. *Founded* 2021 Berlin, Germany **$14M** last round Sept 2024
- 31 [**Unblock** Unblock is a climate technology company that offers a solution to mitigate emissions.](https://millionrounds.com/company/unblock) Unblock is a climate technology company that offers a solution to mitigate emissions. *Founded* 2021 Grand Cayman, Cayman Islands **$14M** last round Jul 2025
- 32 [**Climatiq** Climatiq is a Berlin-based climate technology company founded in 2021, specializing in carbon intelligence as a Software-as-a-Service (SaaS) provider.](https://millionrounds.com/company/climatiq) Climatiq is a Berlin-based climate technology company founded in 2021, specializing in carbon intelligence as a Software-as-a-Service (SaaS) provider. *Founded* 2021 Berlin, Germany **$12M** last round Jun 2025
- 33 [**Kwetta** Kwetta is a New Zealand-based company specializing in EV charging technology, founded in 2021 and headquartered in Napier.](https://millionrounds.com/company/kwetta) Kwetta is a New Zealand-based company specializing in EV charging technology, founded in 2021 and headquartered in Napier. *Founded* 2021 Napier, New Zealand **$11M** last round Jan 2025
- 34 [**Synop** Synop is an enterprise software platform that specializes in optimizing electric vehicle (EV) fleet charging and energy management.](https://millionrounds.com/company/synop) Synop is an enterprise software platform that specializes in optimizing electric vehicle (EV) fleet charging and energy management. *Founded* 2021 New York, United States **$10M** last round Jun 2022
- 35 [**Green Gravity** Green Gravity is an Australian clean technology company founded in 2021, based in North Wollongong, New South Wales.](https://millionrounds.com/company/green-gravity) Green Gravity is an Australian clean technology company founded in 2021, based in North Wollongong, New South Wales. *Founded* 2021 Wollongong, Australia **$9.0M** last round Oct 2024
- 36 [**Renew Risk** Renew Risk is a London-based InsurTech and FinTech company founded in 2021.](https://millionrounds.com/company/renew-risk) Renew Risk is a London-based InsurTech and FinTech company founded in 2021. *Founded* 2021 London, United Kingdom **$7.1M** last round Feb 2025
- 37 [**Milvus Advanced** Milvus Advanced is a UK-based deeptech company located in Oxford, specializing in the production of high-performance nanomaterials.](https://millionrounds.com/company/milvus-advanced) Milvus Advanced is a UK-based deeptech company located in Oxford, specializing in the production of high-performance nanomaterials. *Founded* 2021 Oxford, United Kingdom **$6.9M** last round Oct 2025
- 38 [**Newtrace** Newtrace Private Limited is a climate-tech and deep-tech startup based in Bengaluru, Karnataka, India, founded in 2021.](https://millionrounds.com/company/newtrace) Newtrace Private Limited is a climate-tech and deep-tech startup based in Bengaluru, Karnataka, India, founded in 2021. *Founded* 2021 Bengaluru, India **$6.2M** last round Mar 2026
- 39 [**Go Eve** Innovations to accelerate the transition to EVs.](https://millionrounds.com/company/go-eve) Innovations to accelerate the transition to EVs. *Founded* 2021 United Kingdom **$6.1M** last round Oct 2026
- 40 [**Concrete4Change** Developing novel technology for carbon sequestration into concrete](https://millionrounds.com/company/concrete4change) Developing novel technology for carbon sequestration into concrete *Founded* 2021 Nottingham, United Kingdom **$5.9M** last round Nov 2023
- 41 [**Le Fourgon** Le Fourgon is a French sustainable e-commerce and delivery startup founded in April 2021.](https://millionrounds.com/company/le-fourgon) Le Fourgon is a French sustainable e-commerce and delivery startup founded in April 2021. *Founded* 2021 Wambrechies, France **$5.9M** last round Jan 2025
- 42 [**Nextron Energia** Nextron Energia is Brazil's first climate tech startup, founded in 2021 and based in São Paulo.](https://millionrounds.com/company/nextron-energia) Nextron Energia is Brazil's first climate tech startup, founded in 2021 and based in São Paulo. *Founded* 2021 Sao Paulo, Brazil **$5.3M** last round Mar 2024
- 43 [**Salinity Solutions** Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.](https://millionrounds.com/company/salinity-solutions) Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector. *Founded* 2021 Birmingham, United Kingdom **$5.1M** last round Apr 2026
- 44 [**Hgen** Hgen is a technology company that specializes in producing clean industrial gases, specifically hydrogen and oxygen, for heavy industry sectors such as chemical](https://millionrounds.com/company/hgen) Hgen is a technology company that specializes in producing clean industrial gases, specifically hydrogen and oxygen, for heavy industry sectors such as chemical *Founded* 2021 Los Angeles, United States **$5.0M** last round Sept 2024
- 45 [**Skyfri** Skyfri is a cleantech company that provides solar asset owners with a platform that automates operations, maintenance, and asset management.](https://millionrounds.com/company/skyfri) Skyfri is a cleantech company that provides solar asset owners with a platform that automates operations, maintenance, and asset management. *Founded* 2021 Oslo, Norway **$5.0M** last round Jul 2022
- 46 [**Voltpost** Voltpost transforms lampposts into smart electric vehicle charging stations to make them accessible to people.](https://millionrounds.com/company/voltpost) Voltpost transforms lampposts into smart electric vehicle charging stations to make them accessible to people. *Founded* 2021 Brooklyn, United States **$4.9M** last round Mar 2026
- 47 [**Reefilla** Reefilla provides a mobile and predictive charging delivery service for electric vehicles.](https://millionrounds.com/company/reefilla) Reefilla provides a mobile and predictive charging delivery service for electric vehicles. *Founded* 2021 Turin, Italy **$4.8M** last round Dec 2024
- 48 [**Parallel Carbon** Parallel Carbon is a Manchester-based climate technology company founded in 2021.](https://millionrounds.com/company/parallel-carbon) Parallel Carbon is a Manchester-based climate technology company founded in 2021. *Founded* 2021 Manchester, United Kingdom **$3.8M** last round Jan 2024
- 49 [**Allegro Energy** Allegro Energy is a developer of energy storage technology focus on sustainable solutions for a zero carbon economy.](https://millionrounds.com/company/allegro-energy) Allegro Energy is a developer of energy storage technology focus on sustainable solutions for a zero carbon economy. *Founded* 2021 Newcastle, Australia **$3.5M** last round Jul 2025
- 50 [**Kumulus Water** Kumulus Water is a French-Tunisian GreenTech startup founded in 2021, focused on providing sustainable access to clean drinking water.](https://millionrounds.com/company/kumulus-water) Kumulus Water is a French-Tunisian GreenTech startup founded in 2021, focused on providing sustainable access to clean drinking water. *Founded* 2021 Paris, France **$3.4M** last round May 2025

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies 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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## More cleantech lists

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[*C* *AR* *E* **Cleantech startups in the United States** 480 companies · $50B](https://millionrounds.com/top-lists/cleantech-startups-united-states)[*C* *AR* *S* **Cleantech startups that raised in 2026** 276 companies · $37B in 2026](https://millionrounds.com/top-lists/cleantech-startups-raised-2026)[*S* *C* *OE* **Cleantech startups in the United Kingdom** 156 companies · $8.9B](https://millionrounds.com/top-lists/cleantech-startups-united-kingdom)[*C* *AR* *FE* **Cleantech startups in the United States that raised in 2026** 108 companies · $31B in 2026](https://millionrounds.com/top-lists/cleantech-startups-united-states-raised-2026)[*E* *GF* *EF* **Cleantech startups in Canada** 88 companies · $2.4B](https://millionrounds.com/top-lists/cleantech-startups-canada)[*FF* *S* *E* **Cleantech startups founded in 2020** 76 companies · $8.3B](https://millionrounds.com/top-lists/cleantech-startups-founded-2020)[*KF* *A* *PC* **Cleantech startups founded in 2019** 70 companies · $4.5B](https://millionrounds.com/top-lists/cleantech-startups-founded-2019)[*RE* *RP* *SE* **Cleantech startups founded in 2022** 68 companies · $3.7B](https://millionrounds.com/top-lists/cleantech-startups-founded-2022)

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