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Top 100 Green Energy startups in USA
Sep 27, 2025 | By Alexander Gillet | 30 |
1
Funding: $28M
Sapphire Technologies develops, manufactures, and sells energy recovery systems for both natural gas and hydrogen industrial applications.
Sapphire Technologies develops, manufactures, and sells energy recovery systems for both natural gas and hydrogen industrial applications.
3
Funding: $5M
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
4
Funding: $3.5M
B2U Storage Solutions manufactures battery energy storage systems while unlocking the potential of second life EV Batteries
B2U Storage Solutions manufactures battery energy storage systems while unlocking the potential of second life EV Batteries
5
Funding: $1.7M
StorEn Technologies strives to bring proprietary real innovation to Vanadium Flow Batteries.
StorEn Technologies strives to bring proprietary real innovation to Vanadium Flow Batteries.
6
Funding: $3.8B
Recurrent Energy provides distributed solar power that makes renewable energy a practical choice for large scale energy users.
Recurrent Energy provides distributed solar power that makes renewable energy a practical choice for large scale energy users.
7
Funding: $3.2B
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
8
Funding: $2.9B
Commonwealth Fusion develops energy through inexhaustible power plant. It uses rare-earth barium copper oxide superconductor technology to develop energy.
Commonwealth Fusion develops energy through inexhaustible power plant. It uses rare-earth barium copper oxide superconductor technology to develop energy.
9
Funding: $2.8B
Archer is an aerospace company that developed an electric vertical takeoff and landing aircraft tailored for urban air mobility systems.
Archer is an aerospace company that developed an electric vertical takeoff and landing aircraft tailored for urban air mobility systems.
10
Funding: $2.3B
Bloom Energy offers on-site power generation systems that can use a wide variety of inputs to generate electricity.
Bloom Energy offers on-site power generation systems that can use a wide variety of inputs to generate electricity.
11
Funding: $2.3B
Crusoe Energy pioneered bitcoin (BTC) mining by using wasted natural gas as a power source
Crusoe Energy pioneered bitcoin (BTC) mining by using wasted natural gas as a power source
12
Funding: $2.1B
Silicon Ranch developer, owner and operator of solar energy facilities in US.
Silicon Ranch developer, owner and operator of solar energy facilities in US.
13
Funding: $2B
Nexamp is bringing clean energy to homeowners and communities everywhere, and helping them save up to 10% on electricity costs without installing rooftop solar panels.
Nexamp is bringing clean energy to homeowners and communities everywhere, and helping them save up to 10% on electricity costs without installing rooftop solar panels.
14
Funding: $2B
Pine Gate Renewables is a U.S. developer of 2-25 MW utility-scale solar farms.
Pine Gate Renewables is a U.S. developer of 2-25 MW utility-scale solar farms.
16
Funding: $1.7B
Redaptive is an Energy-as-a-Service provider that funds and installs energy-saving and energy-generating equipment and manages energy use in buildings.
Redaptive is an Energy-as-a-Service provider that funds and installs energy-saving and energy-generating equipment and manages energy use in buildings.
17
Funding: $1.7B
Eos produces cost effective energy storage solutions that are less expensive than other battery technologies.
Eos produces cost effective energy storage solutions that are less expensive than other battery technologies.
18
Funding: $1.6B
Bright Night provides renewable power solutions in a safe and reliable way.
Bright Night provides renewable power solutions in a safe and reliable way.
20
Funding: $1.6B
Form Energy is developing a brand new class of ultra-low cost, long duration energy storage systems. With these new systems, renewables can be made fully firm and dispatchable year-round, and transmission capacity can be expanded without the need for new wires.
Form Energy is developing a brand new class of ultra-low cost, long duration energy storage systems. With these new systems, renewables can be made fully firm and dispatchable year-round, and transmission capacity can be expanded without the need for new wires.
