Top Renewable Energy Startups in United States (2025 Update)
Explore the best Renewable Energy companies in United States. Discover high-growth startups and investment opportunities in our 2025 updated list.
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Explore Top Renewable Energy Startups in United States featuring 2924 Companies
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Watts Battery Corp. | - | Smart Energy Management System; Powerbank for Home and Travel | First all-in-one home energy trading platform, enabled by seamless lego-like pow... | - |
United States
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Santa Clara | United States (HQ) + 1 | 2016 | Energy, Renewable Energy +1 | [email protected] |
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Low
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4
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591 (-23%) | 5 years ago | Debt Financing | 7 | 3.5M | 573 | 9 PPB j5q | |
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CivicSolar, Inc. | Not active anymore | Innovative solar distributor with operations and customer service infrastructure | CivicSolar is the leading national solar equipment distributor providing a range... | - |
United States
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Oakland | United States (HQ) + 2 | 2009 | Energy, Manufacturing +2 | [email protected] |
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N/A
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5
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473 | 7 years ago | Series Unknown | 2 | 3.7M | 2519 | 5 KeH 891 | |
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Heimdal | - | Affordable, Verified DAC. | Heimdal builds machines that permanently capture and store atmospheric CO2. We a... | - |
United States
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Denver | United States (HQ) + 1 | 2020 | Renewable Energy, Sustainability +1 | [email protected] |
1
Low
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13
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1.7K (-35%) | 11 months ago | Series Unknown | 4 | 10.8M | 3449 | 6 months ago | |
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Leap | - | Leap. The leading platform for launching and scaling virtual power plants. | Leap is the leading platform for generating new value from distributed energy re... | - |
United States
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San Francisco | United States (HQ) | 2017 | Energy, Marketplaces +1 | - |
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Low
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107
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10.3K | 1 year ago | Series B | 7 | 60.1M | 14861 | 2 months ago | |
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Eden | - | The leader in natural resource recovery | Eden is a leader in sustainable natural resource recovery. We break rocks with e... | - |
United States
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Somerville | United States (HQ) | 2017 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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56
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2.3K (-72%) | 1 year ago | Grant | 18 | 18.2M | 4200 | 5 months ago | |
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Odyssey Energy Solutions | - | Radically accelerating capital deployment into distributed energy to get more pr... | Odyssey’s mission is to radically accelerate capital deployment into distributed... | - |
United States
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Boulder | United States (HQ) | 2017 | Analytics, Finance +1 | - |
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Low
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51
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4.8K (-16%) | 2 years ago | Series A | 2 | 20.3M | 8775 | 5 months ago | |
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Dandelion Energy | - | Heat Without Fire | Dandelion's nation-leading geothermal systems provide cost-effective renewable h... | - |
United States
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Mount Kisco | United States (HQ) | 2017 | Energy, Renewable Energy | [email protected] |
1
Low
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109
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62.9K (12%) | 2 years ago | Series B | 7 | 134.5M | 14165 | 5 months ago | |
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WeaveGrid | - | We are hiring! | Innovating at the intersection of electric transportation and t... | WeaveGrid works with utilities, automakers, EVSEs, and EV owners to enable and a... | - |
United States
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San Francisco | United States (HQ) | 2018 | Renewable Energy, Transportation | - |
1
Low
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91
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22.3K (3%) | - | Series B | - | 50.0M | 12246 | 5 months ago | |
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Commonwealth Fusion Syste... | - | Designing and building commercial fusion systems to provide limitless, clean ene... | Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy... | - |
United States
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Devens | United States (HQ) | 2018 | ESG, Energy +2 | [email protected] |
1
Low
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896
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39.8K (-37%) | 11 months ago | Grant | 6 | 2.0B | 41073 | 5 months ago | |
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Nitricity | - | Electrified Climate-Smart Fertilizer | Electrified Climate-Smart Fertilizer | - |
United States
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San Francisco | United States (HQ) | 2018 | Agriculture, Energy +2 | - |
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Low
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36
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1.4K (8%) | 2 years ago | Series Unknown | 5 | 26.9M | 5531 | 5 months ago | |
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Fineart LLC | - | Efficient and Innovative Solutions for a Greener Sustainable Future . | At Fineart LLC, we advocate for a holistic approach to energy efficiency that go... | - |
United States
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Dunedin | United States (HQ) | 2022 | Energy, Renewable Energy +3 | [email protected] |
1
Low
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9
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232 | 2 years ago | Convertible Note | 1 | 7.5M | 206 | 2 zrx 5g9 | |
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PHAXTEC, Inc. | - | Nature‘s Materials. | PHAXTEC is an advanced materials start-up commercializing and marketing novel na... | - |
United States
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Wake Forest | United States (HQ) | 2019 | Renewable Energy | [email protected] |
1
Low
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4
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296 | 2 years ago | Grant | 2 | 331.0K | 308 | 1 year ago | |
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Voltea | - | Unlocking the world's water potential | At Voltea, our mission revolves around providing a superior solution to water re... | - |
United States
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Farmers Branch | United States (HQ) + 1 | 2006 | Industrial, Renewable Energy +1 | [email protected] |
1
Low
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22
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3.7K (147%) | 4 years ago | Debt Financing | 8 | 37.0M | 3177 | 7 months ago | |
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MultiGreen Properties | - | Certified B Corp. Building 40,000 Attainable+Sustainable+TechEnabled Multifamily... | MultiGreen was founded in 2019 as a real estate development and operating compan... | - |
United States
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Henderson | United States (HQ) + 18 | 2019 | Real Estate, Renewable Energy +1 | [email protected] |
1
Low
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6
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1.2K (208%) | 5 years ago | Seed | 2 | 4.0M | 2328 | 7 months ago | |
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OmniPV | - | POWER YOUR OFF-GRID LIFE. Your solar, smarter. | We provide solutions and offer leading modularized design of solar-product syste... | - |
United States
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La Verne | United States (HQ) | 2000 | Energy, Renewable Energy | - |
1
Low
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5
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1.2K (-50%) | 16 years ago | Series Unknown | 1 | 5.0M | 14 | 9 Ivr Czr | |
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Omnidian | - | Solar Performance, Guaranteed. | Omnidian's mission is to protect and accelerate investments in clean energy. As... | - |
United States
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Seattle | United States (HQ) | 2016 | Energy, IoT +1 | - |
1
Low
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238
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868 (-100%) | 1 year ago | Series Unknown | 7 | 82.2M | 8706 | 5 months ago | |
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Element 16 Technologies | - | Element 16 improves energy efficiency at industrial processing facilities with h... | Element 16 Technologies is a team of experienced engineers focused on powering a... | - |
United States
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Los Angeles | United States (HQ) | 2016 | Energy, Manufacturing +4 | [email protected] |
1
Low
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5
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621 (-100%) | 3 years ago | Grant | 7 | 7.7M | 215 | 5 JdO 0lJ | |
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Thea Energy | - | Breakthrough fusion technology designed for operation and scale. | Thea Energy is building an economical and scalable fusion energy system utilizin... | - |
United States
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Princeton | United States (HQ) | 2022 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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69
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3.2K (-68%) | 1 year ago | Series A | 2 | 20.0M | 5586 | 5 months ago | |
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FreeWire Technologies | - | Electrification Beyond the Grid™ | FreeWire is an industry leader in battery-integrated ultrafast electric vehicle... | - |
United States
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Newark | United States (HQ) + 2 | 2014 | Energy, Renewable Energy +2 | [email protected] |
1
Low
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91
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9.0K (-9%) | 1 year ago | Series Unknown | 15 | 259.4M | 24354 | 1 year ago | |
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H2U Technologies | - | CATALYZING THE HYDROGEN ECONOMY | H2U Technologies is redefining hydrogen production through innovative catalyst d... | - |
United States
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Chatsworth | United States (HQ) | 2020 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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21
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198 (-71%) | 3 years ago | Series A | 2 | 18.0M | 3642 | 1 year ago | |
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Optimus Technologies, Inc... | - | Near-zero Carbon Emissions Technology... Today! | Founded in 2010, Optimus Technologies® is a clean energy technology company base... | - |
United States
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Pittsburgh | United States (HQ) | 2010 | Manufacturing, Renewable Energy +2 | [email protected] |
1
Low
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45
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14.1K (-38%) | 2 years ago | Series A | 15 | 21.1M | 2632 | 5 months ago | |
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Everest Infrastructure Pa... | - | Wireless Infrastructure for Our Connected World | Everest Infrastructure Partners owns and markets thousands of wireless infrastru... | - |
United States
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Pittsburgh | United States (HQ) | 2015 | Finance, Financial Services +2 | [email protected] |
1
Low
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89
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1.0K (-58%) | 1 year ago | Debt Financing | 3 | 1.2B | 3917 | 5 months ago | |
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Delta Mining | - | Bitcoin mining | Delta Mining is a Latam based bitcoin mining and Data Center colocation services... | - |
United States
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Chicago | United States (HQ) + 2 | 2021 | Blockchain, Crypto +1 | [email protected] |
1
Low
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9
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288 | 3 years ago | Seed | 1 | 1.1M | 33307 | 9 mDa 8iM | |
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OffGridBox | - | We provide affordable clean water and renewable energy in remote areas. | OffGridBox is the world's most powerful modular and compact unit that provides a... | - |
United States
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Somerville | United States (HQ) + 2 | 2016 | Payments, Renewable Energy +3 | [email protected] |
1
Low
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11
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1.7K (55%) | 4 years ago | Non Equity Assistance | 7 | 2.6M | 3058 | 7 months ago | |
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SolarKal | - | Solar Made Simple. Done Right. Leading Commercial Solar Advisory and Marketplace... | SolarKal provides expert commercial solar advisory services, harnessing the powe... | - |
United States
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Somerville | United States (HQ) | 2015 | Energy, Marketplaces +2 | [email protected] |
1
Low
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25
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2.0K (25%) | 7 years ago | Grant | 3 | 750.0K | 1691 | 5 months ago | |
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Rebound Technologies Inc. | - | The world has changed. Let's change the way we cool it. |
Rebound has developed a freeze point suppression cycle that offers a 3-in-1 sol... |
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United States
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Denver | United States (HQ) | 2012 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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17
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482 (-100%) | 1 year ago | Series A | 13 | 17.7M | 1081 | 5 months ago | |
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Super Coffee | - | Inc. Best Workplaces 2020 + 2021 - Kitu Life Inc. Super Coffee |
Positivity is the human's spirit's most powerful source of energy. We make del... |
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United States
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Austin | United States (HQ) | 2015 | Food and Beverage, Manufacturing +1 | [email protected] |
1
Low
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206
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41.3K (-9%) | 7 years ago | Seed | 1 | 131.0M | 23765 | 5 months ago | |
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Copper Labs | - | Copper Labs empowers utilities and their customers by unlocking real-time data f... | Copper Labs unlocks real-time data from existing electric, gas, and water meters... | - |
United States
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Boulder | United States (HQ) | 2016 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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16
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1.3K (8%) | 2 years ago | Series Unknown | 6 | 10.5M | 1422 | 9 months ago | |
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Lynkwell | - | The next generation of electric vehicle charging networks | Lynkwell is an innovative energy technology company with a mission to transform... | - |
United States
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Albany | United States (HQ) | 2016 | Renewable Energy, Energy Storage | - |
1
Low
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65
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2.3K (-43%) | 2 years ago | Private Equity | 1 | 30.0M | 4934 | 4 months ago | |
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Light Polymers | - | Breakthrough materials for a brighter tomorrow | Founded in 2013, with a foundation in nanochemistry and a global presence, Light... | - |
United States
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Santa Clara | United States (HQ) + 1 | 2013 | Fashion, Renewable Energy +1 | [email protected] |
1
Low
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11
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99 (30%) | 7 years ago | Series B | 2 | 29.3M | 842 | 6 months ago | |
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Sitkana | - | Sitkana is transforming predictable ocean movements into usable electricity. | Sitkana is a Juneau-based company developing technology to provide lower cost el... | - |
United States
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Juneau | United States (HQ) | 2021 | Manufacturing, Renewable Energy +1 | [email protected] |
1
Low
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2
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801 | 1 year ago | Grant | 2 | 160.0K | 236 | 11 months ago | |
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Fourth Power | - | Energy Storage that Grows with the Grid | Fourth Power is a thermal battery energy storage company. Our technology makes r... | - |
United States
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Cambridge | United States (HQ) | 2021 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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18
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631 (-100%) | 1 year ago | Series A | 1 | 19.0M | 1620 | 5 months ago | |
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Automat Solutions, Inc. | - | Materials AI Robotics-driven System: Self-driving AI+Robotics accelerating new m... | Lithium battery materials represent a search space of at least quintillion compo... | - |
United States
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Fremont | United States (HQ) | 2019 | Energy, Manufacturing +1 | [email protected] |
1
Low
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8
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405 (-51%) | 2 years ago | Series A | 3 | 224.4K | 654 | 7 months ago | |
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Currant | - | We reinvented the smart outlet from the inside out. | Currant creates smart home products that give people control over their homes —... | - |
United States
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Mountain View | United States (HQ) | 2015 | AI, Consumer Electronics +2 | [email protected] |
1
Low
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41
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1.6K (318%) | 6 years ago | Seed | 2 | 7.0M | 91 | 7 ADf K1Y | |
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First Solar | - | Leading the world's sustainable energy future. | First Solar is a leading American solar technology company and global provider o... | - |
United States
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Tempe | United States (HQ) + 8 | 1999 | Manufacturing, Renewable Energy +1 | - |
1
Low
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5463
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793 (-100%) | 1 year ago | Post Ipo Debt | 5 | 2.2B | 245108 | 6 months ago | |
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CarbonBridge | - | Take Climate Action | Convert methane to methanol, biologically. | - |
United States
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Newark | United States (HQ) + 1 | 2021 | Biotechnology, Renewable Energy | [email protected] |
1
Low
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7
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8 (-100%) | 1 year ago | Pre Seed | 4 | 120.0K | 676 | 9 months ago | |
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Enernet Global | - | Independent Power Producer (IPP) Renewable Hybrid Microgrids Long Term Power Pur... | Enernet provides energy as a service to customers with no access to grid power o... | - |
United States
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New York | United States (HQ) + 1 | 2015 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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21
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653 (86%) | 4 years ago | Series A | 1 | 8.0M | 2360 | 7 months ago | |
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Aspen Power | - | Accelerating the development of distributed clean energy for all. | Aspen's highly experienced team of experts across financing, development, constr... | - |
United States
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New York | United States (HQ) + 1 | 2020 | Energy, Renewable Energy +1 | - |
1
Low
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87
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7.2K (157%) | 1 year ago | Debt Financing | 4 | 801.0M | 11625 | 5 months ago | |
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Team Solar | - | We use solar to help you see returns from unused land, roof, and parking lot spa... | Team Solar is made up of industry experts, solar enthusiasts, and even past cust... | - |
United States
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Framingham | United States (HQ) | 2016 | Energy, Finance +3 | [email protected] |
1
Low
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3
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202 (73%) | 3 years ago | Grant | 2 | 120.0K | 135 | 7 Wpz U3E | |
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Elevate Renewables | - | Elevate is a national renewable energy development company focused on the deploy... | Elevate is a national renewable energy development company focused on the strate... | - |
United States
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Boston | United States (HQ) | 2022 | Renewable Energy, Energy Storage | [email protected] |
1
Low
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20
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809 (-26%) | 2 years ago | Private Equity | 1 | 150.0M | 2273 | 5 months ago |