Top 100 Green Energy startups in USA
Nov 18, 2025
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30
1
Funding: $200M
Fermi America builds energy and AI infrastructure to power next-gen data centers using nuclear, gas, solar, and grid-based solutions.
Fermi America builds energy and AI infrastructure to power next-gen data centers using nuclear, gas, solar, and grid-based solutions.
2
Funding: $108.1M
Air Company is a carbon utilization company creating consumer and industrial products from carbon dioxide (CO2).
Air Company is a carbon utilization company creating consumer and industrial products from carbon dioxide (CO2).
3
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.
4
Funding: $12M
Starpath Robotics builds spacecraft propellant that reduces the deep space transport cost.
Starpath Robotics builds spacecraft propellant that reduces the deep space transport cost.
5
Funding: $4M
Pila Energy develops innovative battery systems and software to provide energy security and energy management for homes and businesses.
Pila Energy develops innovative battery systems and software to provide energy security and energy management for homes and businesses.
6
Funding: $2.4B
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.
8
Funding: $1.8B
Beta Technologies manufactures electric vertical takeoff, landing eVTOL aircraft, and recharging pad systems.
Beta Technologies manufactures electric vertical takeoff, landing eVTOL aircraft, and recharging pad systems.
10
Funding: $431.2M
ESS is a leading provider of long-duration energy storage solutions ideally suited for C&I, utility, microgrid and off-grid applications. Using food-grade, earth-abundant elements like iron, salt, and water for the electrolyte, its innovative iron flow battery system is changing how the industry deploys energy storage.
ESS is a leading provider of long-duration energy storage solutions ideally suited for C&I, utility, microgrid and off-grid applications. Using food-grade, earth-abundant elements like iron, salt, and water for the electrolyte, its innovative iron flow battery system is changing how the industry deploys energy storage.
11
Funding: $172.8M
Husk is the leading net-zero energy company serving rural Africa and Asia and operator of the largest fleet of community solar minigrids.
Husk is the leading net-zero energy company serving rural Africa and Asia and operator of the largest fleet of community solar minigrids.
12
Funding: $171.6M
Niron develops innovative rare earth free magnetic materials for high performance and low-cost permanent magnets.
Niron develops innovative rare earth free magnetic materials for high performance and low-cost permanent magnets.
13
Funding: $164.9M
Wildcat Discovery Technologies is a developer of materials for the use in batteries.
Wildcat Discovery Technologies is a developer of materials for the use in batteries.
14
Funding: $40.7M
Worlds' technology combines deep learning and IoT inside of a 4D environment to give organizations the ability to observe their organization’s physical space and then, analyze and learn from their physical surroundings
Worlds' technology combines deep learning and IoT inside of a 4D environment to give organizations the ability to observe their organization’s physical space and then, analyze and learn from their physical surroundings
15
Funding: $39.1M
Odyssey Energy Solutions is an industry platform to simplify, streamline, and reduce the costs of developing and financing energy projects.
Odyssey Energy Solutions is an industry platform to simplify, streamline, and reduce the costs of developing and financing energy projects.
16
Funding: $38.4M
mPower Technology is an innovative solar cell technology startup.They are an experienced team of technology innovators and industry veterans out to shape the future of solar power around the globe.
mPower Technology is an innovative solar cell technology startup.They are an experienced team of technology innovators and industry veterans out to shape the future of solar power around the globe.
17
Funding: $33.6M
Planted Solar is a solar power plant development startup, that is shaking up the solar industry by using robots and specialized modeling software to speed up deployment.
Planted Solar is a solar power plant development startup, that is shaking up the solar industry by using robots and specialized modeling software to speed up deployment.
18
Funding: $31.1M
Virtual Peaker’s web-based platform uses customers’ smart home devices to track and control consumption, keep the grid stable, and allow utilities to bring in more renewable energy sources.
Virtual Peaker’s web-based platform uses customers’ smart home devices to track and control consumption, keep the grid stable, and allow utilities to bring in more renewable energy sources.
19
Funding: $29.3M
GoodPeak is a utility-scale battery energy storage platform that offers energy storage development pipeline.
GoodPeak is a utility-scale battery energy storage platform that offers energy storage development pipeline.
20
Funding: $22.5M
KULR Technology Group is taking its space-proven solutions for electronics and lithium-ion batteries to serve the world of electric transportation, energy storage, battery safety, 5G infrastructure, cloud computing, and aerospace and defense applications.
KULR Technology Group is taking its space-proven solutions for electronics and lithium-ion batteries to serve the world of electric transportation, energy storage, battery safety, 5G infrastructure, cloud computing, and aerospace and defense applications.
