Top 20 Clean (Renewable) Energy startups in USA
Nov 07, 2025
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22
1
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.
3
Funding: $1.8B
energyRe is at the forefront of North America's energy transition. Building and delivering reliable clean power directly to where people live is not only our opportunity—it is our responsibility.
energyRe is at the forefront of North America's energy transition. Building and delivering reliable clean power directly to where people live is not only our opportunity—it is our responsibility.
4
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.
5
Funding: $4.8M
Solstice provides turnkey customer solutions for shared solar.
Solstice provides turnkey customer solutions for shared solar.
6
Funding: $20.2B
Tesla accelerates the transition to electric mobility with a full range of increasingly affordable electric cars. Tesla also produces Solar Roof, home batteries and operates large solar stations with energy storage.
Tesla accelerates the transition to electric mobility with a full range of increasingly affordable electric cars. Tesla also produces Solar Roof, home batteries and operates large solar stations with energy storage.
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: $2.1B
Silicon Ranch developer, owner and operator of solar energy facilities in US.
Silicon Ranch developer, owner and operator of solar energy facilities in US.
9
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.
10
Funding: $700M
AES Distributed Energy creates solar plus storage facilities, which includes systems that can hold and release solar energy at will.
AES Distributed Energy creates solar plus storage facilities, which includes systems that can hold and release solar energy at will.
11
Funding: $575.5M
Arcadia Power is a nationwide home energy platform providing clean energy and savings.
Arcadia Power is a nationwide home energy platform providing clean energy and savings.
12
Funding: $203.4M
SolarReserve is a leading global developer of utility-scale solar power projects, which include electricity generation by solar thermal energy and photovoltaic panels. In addition, SolarReserve has commercialized a proprietary advanced solar thermal technology with integrated molten salt energy storage that solves the intermittency issues experienced with other renewable energy sources.
SolarReserve is a leading global developer of utility-scale solar power projects, which include electricity generation by solar thermal energy and photovoltaic panels. In addition, SolarReserve has commercialized a proprietary advanced solar thermal technology with integrated molten salt energy storage that solves the intermittency issues experienced with other renewable energy sources.
13
Funding: $178.9M
Modern Energy is an energy asset management firm that invests in businesses that bring emerging energy technologies to market and the energy resources those businesses produce. From energy efficiency in the United States to solar projects in Brazil to virtual power plants in the United Kingdom, Modern supports leaders in the transition to a digital energy ecosystem.
Modern Energy is an energy asset management firm that invests in businesses that bring emerging energy technologies to market and the energy resources those businesses produce. From energy efficiency in the United States to solar projects in Brazil to virtual power plants in the United Kingdom, Modern supports leaders in the transition to a digital energy ecosystem.
14
Funding: $139.6M
LevelTen is the safest, most cost-effective way for C&I customers to purchase renewable energy.
LevelTen is the safest, most cost-effective way for C&I customers to purchase renewable energy.
15
Funding: $52.7M
Cherry Street Energy operates as a renewable energy company. Its customers purchase solar power at a competitive rate. Each customer benefits from a comprehensive solar experience, as well as energy insights and analytics.
Cherry Street Energy operates as a renewable energy company. Its customers purchase solar power at a competitive rate. Each customer benefits from a comprehensive solar experience, as well as energy insights and analytics.
16
Funding: $50M
Accelergen Energy is a greenfield energy developer of utility-scale solar, solar plus storage and standalone storage projects
Accelergen Energy is a greenfield energy developer of utility-scale solar, solar plus storage and standalone storage projects
17
Funding: $16.6M
WattBuy aims to give households a simple platform to shop for an electricity provider in states where that is an option. Users are able to upload their electricity usage and compare available plans to save money or buy electricity from a solar or wind energy provider.
WattBuy aims to give households a simple platform to shop for an electricity provider in states where that is an option. Users are able to upload their electricity usage and compare available plans to save money or buy electricity from a solar or wind energy provider.
19
Funding: $11.8M
Evergreen creates a marketplace for clean energy projects that ensures and quantifies the impact of every Renewable Energy Certificate.
Evergreen creates a marketplace for clean energy projects that ensures and quantifies the impact of every Renewable Energy Certificate.
20
Funding: $6.9M
GoSun designed a breakthrough technology that allows people to enjoy outdoor gear without having to worry about carbon-emitting power generators. GoSun sells solar ovens, portable fridges, lighting, charging, water purification, tiny houses and power generators.
GoSun designed a breakthrough technology that allows people to enjoy outdoor gear without having to worry about carbon-emitting power generators. GoSun sells solar ovens, portable fridges, lighting, charging, water purification, tiny houses and power generators.
