Top list · Worldwide
Energy startups founded in 2021
111 energy startups founded in 2021 have raised money in rounds we track. These are the 50 that have raised the most, $8.5B between them, with the United States the most common home.
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Akaysha EnergyAkaysha Energy offers full-cycle development for projects including Battery Energy Storage Systems (BESS) and renewable energy.Akaysha Energy offers full-cycle development for projects including Battery Energy Storage Systems (BESS) and renewable energy.
Founded 2021Melbourne, Australia$1.5Blast round Oct 2026 - 2
Technip EnergiesTechnip Energies is a engineering & technology company for the energy transition.Technip Energies is a engineering & technology company for the energy transition.
Founded 2021Nanterre, France$1.4Blast round Jun 2026 - 3
Rolls-Royce SMRRolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions.Rolls-Royce SMR specializes in producing factory-built nuclear power plants and offers sustainable, low-cost energy solutions.
Founded 2021Derby, United Kingdom$1.2Blast round Apr 2026 - 4
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 - 5
HEQ DeepwaterHEQ Deepwater is an energy company that focused on the acquisition of the deepwater gulf.HEQ Deepwater is an energy company that focused on the acquisition of the deepwater gulf.
Founded 2021Houston, United States$400Mlast round Aug 2021 - 6
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 - 7
Cero GenerationCero Generation is a solar energy company that develops solar energy and energy storage solutions.Cero Generation is a solar energy company that develops solar energy and energy storage solutions.
Founded 2021London, United Kingdom$312Mlast round Jul 2025 - 8
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 - 9
Ambient FuelsAmbient Fuels is a green energy developer that delivers green hydrogen solutions.Ambient Fuels is a green energy developer that delivers green hydrogen solutions.
Founded 2021New York, United States$250Mlast round May 2023 - 10
Constantine Energy StorageConstantine Energy Storage is an energy storage company that provides energy management and renewable energy services.Constantine Energy Storage is an energy storage company that provides energy management and renewable energy services.
Founded 2021Godalming, United Kingdom$234Mlast round Mar 2025 - 11
Terra OneTerra One engages in the development and operation of large-scale battery storage systems.Terra One engages in the development and operation of large-scale battery storage systems.
Founded 2021Berlin, Germany$185Mlast round Sept 2025 - 12HaventusHaventus is an energy management firm that focuses on facilitating the energy transition and supporting economic development.
Haventus is an energy management firm that focuses on facilitating the energy transition and supporting economic development.
Founded 2021Ardersier, United Kingdom$126Mlast round May 2024 - 13
KolomaKoloma is a geologic hydrogen company that leverages technology and data to identify and commercialize geologic hydrogen resources.Koloma is a geologic hydrogen company that leverages technology and data to identify and commercialize geologic hydrogen resources.
Founded 2021Denver, United States$111Mlast round Oct 2026 - 14
Xcimer EnergyXcimer Energy is an inertial fusion company offering laser-driven fusion to provide cheap, abundant, and carbon-free energy.Xcimer Energy is an inertial fusion company offering laser-driven fusion to provide cheap, abundant, and carbon-free energy.
Founded 2021United States$100Mlast round Sept 2026 - 15
Factorial EnergyFactorial Energy focuses on sustainable future with safe, high performance batteries for EVs, homes, and critical applications.Factorial Energy focuses on sustainable future with safe, high performance batteries for EVs, homes, and critical applications.
Founded 2021Woburn, United States$100Mlast round Jun 2026 - 16
Radiance RenewablesRadiance Renewables is one of India’s fastest-growing renewable energy solution providers.Radiance Renewables is one of India’s fastest-growing renewable energy solution providers.
Founded 2021Mumbai$100Mlast round Feb 2026 - 17
Reflect OrbitalReflect Orbital is an American space technology company founded in 2021 and based in Hawthorne, California.Reflect Orbital is an American space technology company founded in 2021 and based in Hawthorne, California.
Founded 2021Los Angeles, United States$94Mlast round Nov 2026 - 18
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 - 19
Varco EnergyVarco Energy is a battery storage asset owner and operator.Varco Energy is a battery storage asset owner and operator.
Founded 2021London, United Kingdom$75Mlast round Sept 2023 - 20
TemTem Energy Limited, based in London, is an innovative energy technology company founded in 2021.Tem Energy Limited, based in London, is an innovative energy technology company founded in 2021.
Founded 2021London, United Kingdom$75Mlast round Feb 2026 - 21
Ionic BlueIonic Blue's collaborative initiatives enable IonicBlue customers to pursue responsible environmental sustainability solutions.Ionic Blue's collaborative initiatives enable IonicBlue customers to pursue responsible environmental sustainability solutions.
Founded 2021East Rutherford, United States$74Mlast round May 2023 - 22
LogivoltLogivolt is a financing solution for collective infrastructure for charging electric vehiclesLogivolt is a financing solution for collective infrastructure for charging electric vehicles
Founded 2021Paris, France$74Mlast round Dec 2022 - 23
Rega EnergyREGA ENERGY is a Portuguese renewable energy company established in 2021, focused on developing, financing, building, owning, and operating biomethane and greenREGA ENERGY is a Portuguese renewable energy company established in 2021, focused on developing, financing, building, owning, and operating biomethane and green
Founded 2021Lisbon, Portugal$67Mlast round Jul 2023 - 24Vision Blue ResourcesVision Blue Resources is to create a portfolio of strategic investments in clean energy-related metal and mineral resource companies.
Vision Blue Resources is to create a portfolio of strategic investments in clean energy-related metal and mineral resource companies.
Founded 2021United Kingdom$60Mlast round Feb 2021 - 25
Energy SingularityEnergy Singularity is a fusion energy company based in Shanghai, founded in 2021.Energy Singularity is a fusion energy company based in Shanghai, founded in 2021.
Founded 2021Shanghai, China$58Mlast round Apr 2023 - 26
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 - 27
JIMMYJimmy Energy is a French industrial startup founded in 2020, focused on designing and operating thermal generators powered by 4th-generation high-temperature miJimmy Energy is a French industrial startup founded in 2020, focused on designing and operating thermal generators powered by 4th-generation high-temperature mi
Founded 2021Paris, France$49Mlast round Mar 2026 - 28
CalogenaCalogena is a French technology company founded in 2021, specializing in the design and deployment of Small Modular Reactors (SMRs) for urban district heating.Calogena is a French technology company founded in 2021, specializing in the design and deployment of Small Modular Reactors (SMRs) for urban district heating.
Founded 2021Aix-en-Provence, France$45Mlast round Nov 2026 - 29
FleetzeroFleetzero is building battery electric cargo ships to affordably decarbonize ocean freight.Fleetzero is building battery electric cargo ships to affordably decarbonize ocean freight.
Founded 2021Auburn, United States$43Mlast round Jan 2026 - 30
Helical FusionHelical Fusion Co., Ltd.Helical Fusion Co., Ltd.
Founded 2021Chuo City, Japan$43Mlast round Oct 2026 - 31
Fourth PowerFourth Power is an innovative energy technology company based in Cambridge, Massachusetts.Fourth Power is an innovative energy technology company based in Cambridge, Massachusetts.
Founded 2021Cambridge, United States$39Mlast round Sept 2025 - 32
Solidion TechnologySolidion Technology is a battery technology company that manufactures battery materials, components, and next-generation batteries.Solidion Technology is a battery technology company that manufactures battery materials, components, and next-generation batteries.
Founded 2021Dallas, United States$35Mlast round Jun 2026 - 33
ENODAENODA provides the transition to a zero-carbon energy system in a way that is economically sustainable for all.ENODA provides the transition to a zero-carbon energy system in a way that is economically sustainable for all.
Founded 2021United Kingdom$32Mlast round Feb 2025 - 34
Adden EnergyAdden Energy is a Harvard University spinout based in Waltham, Massachusetts, founded in 2021.Adden Energy is a Harvard University spinout based in Waltham, Massachusetts, founded in 2021.
Founded 2021Waltham, United States$32Mlast round Oct 2026 - 35
ETZETZ is a pioneer in the field of net zero energy transition and a net exporter of goods, services, technology, and expertise.ETZ is a pioneer in the field of net zero energy transition and a net exporter of goods, services, technology, and expertise.
Founded 2021Aberdeen, United Kingdom$23Mlast round Oct 2025 - 36
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 - 37
Coast EnergyCoast Energy is a commercial and industrial solar energy firm based in El Segundo, California.Coast Energy is a commercial and industrial solar energy firm based in El Segundo, California.
Founded 2021El Segundo, United States$21Mlast round May 2025 - 38
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 - 39Bradford EnergyBradford Energy offers an air source heat pump heat network.
Bradford Energy offers an air source heat pump heat network.
Founded 2021London, United Kingdom$20Mlast round May 2023 - 40
Euclid PowerEuclid Power is a New York-based company founded in 2021 that specializes in renewable energy software and services.Euclid Power is a New York-based company founded in 2021 that specializes in renewable energy software and services.
Founded 2021New York, United States$20Mlast round Sept 2025 - 41
VoltfangVoltfang develops home storage solutions for private houses using recycled traction batteries.Voltfang develops home storage solutions for private houses using recycled traction batteries.
Founded 2021Aachen, Germany$17Mlast round Jun 2025 - 42
DodaiDodai is an Ethiopian electric motorcycle manufacturer based in Addis Ababa, founded by Japanese entrepreneur Yuma Sasaki.Dodai is an Ethiopian electric motorcycle manufacturer based in Addis Ababa, founded by Japanese entrepreneur Yuma Sasaki.
Founded 2021Addis Ababa, Ethiopia$17Mlast round May 2026 - 43
Quantum Commodity IntelligenceQuantum Commodity Intelligence (QCI) is an independent Price Reporting Agency (PRA) focused on providing market intelligence for the energy transition and carbon markets.Quantum Commodity Intelligence (QCI) is an independent Price Reporting Agency (PRA) focused on providing market intelligence for the energy transition and carbon markets.
Founded 2021London, United Kingdom$17Mlast round Jul 2024 - 44
R3 RoboticsR3 Robotics is an AI-powered robotics company based in Luxembourg, specializing in the automated industrial disassembly of electric vehicle (EV) systems.R3 Robotics is an AI-powered robotics company based in Luxembourg, specializing in the automated industrial disassembly of electric vehicle (EV) systems.
Founded 2021Luxembourg City, Luxembourg$17Mlast round Feb 2026 - 45
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 - 46
Guorui XiechuangGuorui Xiechuang is a high-tech enterprise that provides power + energy storage products and solutions for global customers.Guorui Xiechuang is a high-tech enterprise that provides power + energy storage products and solutions for global customers.
Founded 2021Shenzhen$14Mlast round May 2023 - 47
Jiamai sharesJiamai is a new energy pneumatic component manufacturer.Jiamai is a new energy pneumatic component manufacturer.
Founded 2021Longgang$14Mlast round Feb 2025 - 48
Green FusionGreen Fusion develops a simple and secure software solution for more efficient control of your energy system.Green Fusion develops a simple and secure software solution for more efficient control of your energy system.
Founded 2021Berlin, Germany$13Mlast round Jan 2025 - 49
SplightSplight is an AI-driven grid technology company founded in 2021, headquartered in San Mateo, California, with additional offices in Austin, Santiago, and Spain.Splight is an AI-driven grid technology company founded in 2021, headquartered in San Mateo, California, with additional offices in Austin, Santiago, and Spain.
Founded 2021San Francisco, United States$12Mlast round Aug 2025 - 50
EquaticEquatic uses a seawater electrolysis process that enhances the ocean's capacity to absorb and store large quantities of carbon dioxide.Equatic uses a seawater electrolysis process that enhances the ocean's capacity to absorb and store large quantities of carbon dioxide.
Founded 2021Torrance, United States$12Mlast round Aug 2025
Melbourne, Australia
Nanterre, France
Derby, United Kingdom
Hamburg, Germany
Houston, United States
Lisbon, Portugal
Shanghai, China
Chuo City, Japan
Addis Ababa, Ethiopia
Luxembourg City, LuxembourgCompanies 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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