Top Clean Energy Startups in United States (2025 Update)
Explore the best Clean Energy companies in United States. Discover high-growth startups and investment opportunities in our 2025 updated list.
👋🏼 Hi, I'm Bounce Watch. Let's explore what's happening in Top Clean Energy Startups in United States!
Real-Time Scouting Assistant
Explore Top Clean Energy Startups in United States featuring 709 Companies
|
|
|
|||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Biopipe | - | Water for Tomorrow. Transforming the water industry with our NO sludge wastewate... | Biopipe Global is an innovative wastewater treatment and water recycling company... | - |
United States
|
Istanbul | United States (HQ) + 6 | 2011 | Energy, Clean Energy +2 | [email protected] |
1
Low
|
19
|
1.1K | 10 years ago | Seed | 3 | 1.0M | 918 | 3 years ago | |
|
|
|
Seven Bridges | - | Accelerate discovery with a complete bioinformatics ecosystem. | Seven Bridges is the industry-leading unified bioinformatics solutions company a... | - |
United States
|
Boston | United States (HQ) + 5 | 2009 | Analytics, Cloud Infrastructure +4 | [email protected] |
1
Low
|
171
|
18.4K (-25%) | 4 years ago | Series C | 4 | 113.0M | 18969 | 4 months ago | |
|
|
|
CivicSolar, Inc. | - | Innovative solar distributor with operations and customer service infrastructure | CivicSolar is the leading national solar equipment distributor providing a range... | - |
United States
|
Oakland | United States (HQ) + 2 | 2009 | Energy, Manufacturing +2 | [email protected] |
1
Low
|
5
|
97 | 7 years ago | Series Unknown | 2 | 3.7M | 2525 | 3 5SP 2s7 | |
|
|
|
Gradient | - | We make home heaters & air conditioners that are better for the planet, easier t... | Gradient’s mission is to cool the world by transforming every home to be more co... | - |
United States
|
San Francisco | United States (HQ) | 2017 | Consumer Electronics, Clean Energy | [email protected] |
1
Low
|
71
|
22.9K (-36%) | 1 year ago | Convertible Note | 8 | 48.5M | 8776 | 6 months ago | |
|
|
|
LineVision | - | Accelerating the Net Zero Grid | LineVision is a rapidly growing climate tech company, helping our utility partne... | - |
United States
|
Boston | United States (HQ) | 2018 | Analytics, Big Data +2 | [email protected] |
1
Low
|
90
|
4.1K | 2 years ago | Series C | 5 | 49.8M | 6042 | 5 months ago | |
|
|
|
Eden | - | The leader in natural resource recovery | Eden is a leader in sustainable natural resource recovery. We break rocks with e... | - |
United States
|
Somerville | United States (HQ) | 2017 | Energy, Renewable Energy +1 | [email protected] |
1
Low
|
56
|
2.3K (-72%) | 1 year ago | Grant | 18 | 18.2M | 4200 | 5 months ago | |
|
|
-logo.jpg "Spren"){kind=logo}
|
Spren | - | The smartest way to measure and improve body composition |
Consumers spend trillions every year to look, feel, and perform better. As a fi... |
- |
United States
|
Asheville | United States (HQ) | 2017 | Health and Wellness, Clean Energy | - |
1
Low
|
25
|
25.0K (34%) | 2 years ago | Seed | 1 | 11.3M | 2387 | 2 years ago | |
|
|
|
Parse Biosciences | - | Scalable Single Cell Sequencing Without the Instrument | Parse Biosciences is a global life sciences company whose mission is to accelera... | - |
United States
|
Seattle | United States (HQ) | 2018 | Biotechnology, Life Sciences +1 | [email protected] |
1
Low
|
132
|
37.1K (-32%) | 1 year ago | Series C | 6 | 100.0M | 17245 | 5 months ago | |
|
|
|
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
|
Devens | United States (HQ) | 2018 | ESG, Energy +2 | [email protected] |
1
Low
|
896
|
39.8K (-37%) | 11 months ago | Grant | 6 | 2.0B | 41073 | 5 months ago | |
|
|
|
Wildcat Discovery Technol... | - | Producing High-Performance, U.S.-made Cathodes | Wildcat's vision is to be the first choice for battery material development, int... | - |
United States
|
San Diego | United States (HQ) | 2006 | Design, Energy +1 | [email protected] |
1
Low
|
98
|
4.7K (74%) | 2 years ago | Series D | 3 | 160.0M | 7127 | 5 months ago | |
|
|
|
FlexEnergy Solutions | - | Clean, efficient, rugged and ultra-reliable small gas turbines. | FlexEnergy Solutions is a technology company that designs, manufactures, leases... | - |
United States
|
Greenwood Village | United States (HQ) | 2000 | Energy, Manufacturing +2 | [email protected] |
1
Low
|
71
|
1.7K (-11%) | 10 years ago | Private Equity | 4 | 25.3M | 2783 | 5 months ago | |
|
|
|
AmpUp | - | EV charging made simple ⚡️ | AmpUp is an electric vehicle (EV) charging company that enables drivers, hosts,... | - |
United States
|
Santa Clara | United States (HQ) + 1 | 2018 | Transportation, Clean Energy +1 | [email protected] |
1
Low
|
57
|
23.0K (26%) | 8 months ago | A | 8 | 2.0M | 5389 | 5 months ago | |
|
|
|
Sunwealth | - | A clean energy investment firm changing who has access to renewable energy by ch... | Sunwealth’s mission is to invest in the future of energy, generating financial,... | - |
United States
|
Cambridge | United States (HQ) | 2014 | Energy, Clean Energy | [email protected] |
1
Low
|
47
|
11.5K (-38%) | 2 years ago | Debt Financing | 6 | 15.2M | 3259 | 5 months ago | |
|
|
|
Genialis | - | The RNA Biomarker Company. | Genialis, the RNA biomarker company, is creating a world where healthcare delive... | - |
United States
|
Boston | United States (HQ) + 1 | 2015 | Biotechnology, Health Care +1 | [email protected] |
1
Low
|
42
|
1.3K (18%) | 2 years ago | Series A | 4 | 15.5M | 3974 | 5 months ago | |
|
|
|
Thea Energy | - | Breakthrough fusion technology designed for operation and scale. | Thea Energy is building an economical and scalable fusion energy system utilizin... | - |
United States
|
Princeton | United States (HQ) | 2022 | Energy, Renewable Energy +1 | [email protected] |
1
Low
|
69
|
3.2K (-68%) | 1 year ago | Series A | 2 | 20.0M | 5586 | 5 months ago | |
|
|
|
FreeWire Technologies | - | Electrification Beyond the Grid™ | FreeWire is an industry leader in battery-integrated ultrafast electric vehicle... | - |
United States
|
Newark | United States (HQ) + 2 | 2014 | Energy, Renewable Energy +2 | [email protected] |
1
Low
|
91
|
9.0K (-9%) | 1 year ago | Series Unknown | 15 | 259.4M | 24354 | 1 year ago | |
|
|
|
H2U Technologies | - | CATALYZING THE HYDROGEN ECONOMY | H2U Technologies is redefining hydrogen production through innovative catalyst d... | - |
United States
|
Chatsworth | United States (HQ) | 2020 | Energy, Renewable Energy +1 | [email protected] |
1
Low
|
21
|
198 (-71%) | 3 years ago | Series A | 2 | 18.0M | 3642 | 1 year ago | |
|
|
|
CleanJoule | - | The full performance sustainable aviation fuel company. | CleanJoule’s goal is to make aviation fully independent from the petroleum indus... | - |
United States
|
West Valley City | United States (HQ) | 2009 | Manufacturing, Clean Energy +1 | [email protected] |
1
Low
|
31
|
2.0K (67%) | 2 years ago | Private Equity | 1 | 50.0M | 866 | 10 months ago | |
|
|
|
Intus Bio | - | Revolutionary microbiome research, discovery, and testing | Intus Bio is using its proprietary high-resolution, high-throughput assay and an... | - |
United States
|
Farmington | United States (HQ) | 2015 | Biotechnology, Health Care +1 | [email protected] |
1
Low
|
13
|
1.6K (-27%) | 10 months ago | Series Unknown | 6 | 4.2M | 1185 | 5 months ago | |
|
|
|
First Solar | - | Leading the world's sustainable energy future. | First Solar is a leading American solar technology company and global provider o... | - |
United States
|
Tempe | United States (HQ) + 8 | 1999 | Manufacturing, Renewable Energy +1 | - |
1
Low
|
5463
|
161 (-100%) | 1 year ago | Post Ipo Debt | 5 | 2.2B | 245108 | 6 months ago | |
|
|
|
Aspen Power | - | Accelerating the development of distributed clean energy for all. | Aspen's highly experienced team of experts across financing, development, constr... | - |
United States
|
New York | United States (HQ) + 1 | 2020 | Energy, Renewable Energy +1 | - |
1
Low
|
87
|
7.2K (157%) | 1 year ago | Debt Financing | 4 | 801.0M | 11625 | 5 months ago | |
|
|
|
Mission Bio | - | The Tapestri® Platform; the only technology that provides single-cell targeted D... | Mission Bio is a company of passionate people dedicated to solving complex biolo... | - |
United States
|
South San Francisco | United States (HQ) | 2014 | Biotechnology, Health Care +1 | [email protected] |
1
Low
|
91
|
13.6K (9%) | 3 years ago | Debt Financing | 10 | 150.9M | 18571 | 11 months ago | |
|
|
|
WATTMORE | - | WATTMORE is committed to a 100% renewable energy future with game changing AI-dr... | WATTMORE is building a software infrastructure which seamlessly integrates and m... | - |
United States
|
Denver | United States (HQ) | 2017 | Energy, Renewable Energy +2 | [email protected] |
1
Low
|
9
|
279 | 3 years ago | Series A | 4 | 4.0M | 2220 | 5 months ago | |
|
|
|
X-energy | - | Delivering the next generation of advanced nuclear energy technology. | X-energy is delivering the next generation of carbon-free energy by reinventing... | - |
United States
|
Rockville | United States (HQ) | 2009 | Energy, Renewable Energy +1 | [email protected] |
1
Low
|
588
|
30.1K | 1 year ago | Grant | 6 | 285.2M | 34459 | 5 months ago | |
|
|
|
Steelhead Composites | - | Manufacturer of leading compressed hydrogen storage solutions for the energy tra... | Steelhead Composites is a world-class advanced manufacturing company, based in G... | - |
United States
|
Golden | United States (HQ) | 2012 | Manufacturing, Space +2 | [email protected] |
1
Low
|
29
|
1.8K (20%) | 1 year ago | Series Unknown | 8 | 16.4M | 2758 | 6 months ago | |
|
|
|
Pecan Street Inc. | - | Better data, better tech, a better world - we're making it happen. | Pecan Street Inc. is a 501(c)3 organization that conducts groundbreaking researc... | - |
United States
|
Austin | United States (HQ) + 1 | 2009 | Energy, Clean Energy | [email protected] |
1
Low
|
37
|
11.1K | 1 year ago | Grant | 2 | 3.6M | 943 | 5 months ago | |
|
|
|
Sealed | - | On a mission to stop home energy waste and electrify every home. | Sealed is a climate tech company on a mission to stop home energy waste by enabl... | - |
United States
|
New York | United States (HQ) | 2012 | Lending and Investments, Sustainability +2 | [email protected] |
1
Low
|
53
|
83.7K (-25%) | 1 year ago | Series B | 6 | 97.5M | 6971 | 6 months ago | |
|
|
|
NOVOS | - | Making the latest scientific advances in longevity accessible and achievable for... | NOVOS leverages science and data to create the best nutraceuticals to extend hum... | - |
United States
|
New York | United States (HQ) | 2018 | Biopharma, Biotechnology +5 | [email protected] |
1
Low
|
30
|
300.5K (-18%) | 3 years ago | Angel | 3 | 3.2M | 9821 | 5 months ago | |
|
|
|
Arcadia | - | Connecting the clean energy future by democratizing access to energy data. |
Arcadia is an energy data company connecting the clean energy future. By unloc... |
- |
United States
|
Greenwood Village | United States (HQ) | 2014 | Data Analytics, Renewable Energy +1 | [email protected] |
1
Low
|
798
|
261.5K (-2%) | 1 year ago | Series E | 15 | 575.5M | 38345 | 7 months ago | |
|
|
|
Renew Financial | - | A simple way to pay for energy and safety home improvements. | Renew Financial originated Property Assessed Clean Energy (PACE), an innovative,... | - |
United States
|
Oakland | United States (HQ) | 2008 | Finance, Financial Services +3 | [email protected] |
1
Low
|
200
|
37.2K (-8%) | 7 years ago | Debt Financing | 6 | 602.2M | 6514 | 5 months ago | |
|
|
|
Actio Biosciences, Inc. | - | From One To Many. | We’re leveraging advances in genetics and precision medicine to develop new ther... | - |
United States
|
San Diego | United States (HQ) | 2021 | Biotechnology, Clean Energy | - |
1
Low
|
35
|
749 (-32%) | 1 year ago | Series A | 1 | 55.0M | 2750 | 6 months ago | |
|
|
|
Unlearn.AI | - | Advancing AI to eliminate trial and error in medicine. | Advancing artificial intelligence to eliminate trial and error in medicine. | - |
United States
|
San Francisco | United States (HQ) + 1 | 2017 | AI, Life Sciences +1 | [email protected] |
1
Low
|
78
|
13.4K (2%) | 1 year ago | Series C | 7 | 134.9M | 9398 | 5 months ago | |
|
|
|
Geminus | - | AI for the real-time optimization of equipment and systems. AI for the energy t... | Geminus is an industrial AI optimization platform challenging the AI status quo.... | - |
United States
|
Cambridge | United States (HQ) + 1 | 2018 | AI, Renewable Energy +6 | [email protected] |
1
Low
|
33
|
1.6K (-43%) | 1 year ago | Series A | 4 | 22.9M | 2155 | 5 months ago | |
|
|
|
Zeno Power | - | Harnessing the power of radioisotopes. | At Zeno, we're harnessing the power of radioisotopes to provide clean, plug-and-... | - |
United States
|
Seattle | United States (HQ) + 1 | 2018 | Space, Clean Energy | [email protected] |
1
Low
|
56
|
1.6K (-6%) | 1 year ago | Grant | 4 | 36.9M | 5333 | 6 months ago | |
|
|
|
Carrier Energy Partners | - | Focused on acquiring and optimizing upstream oil and gas assets with strategic o... | Carrier Energy Partners is a private oil and gas company dedicated to acquiring... | - |
United States
|
Sugar Land | United States (HQ) + 1 | 2013 | Energy, Clean Energy +1 | [email protected] |
1
Low
|
1
|
510 (2%) | 10 years ago | Private Equity | 2 | 400.1M | 33 | 9 ek5 cou | |
|
|
|
Neon Therapeutics | Not active anymore | We turn cancer’s most daunting weapon into its biggest vulnerability. | Neon Therapeutics is a clinical-stage immuno-oncology company and a leader in th... | - |
United States
|
Cambridge | United States (HQ) | 2015 | Biotechnology, Health Care +2 | [email protected] |
-1
N/A
|
15
|
735 | 7 years ago | Series B | 3 | 161.0M | 7606 | 9 QKF w3b | |
|
|
|
Solarflux | - | Flexible, clean, inexpensive solar thermal power | Solarflux develops and markets the FOCUS, an innovative parabolic dish concentra... | - |
United States
|
Reading | United States (HQ) + 1 | 2019 | Energy, Renewable Energy +1 | [email protected] |
1
Low
|
6
|
1.0K | 4 years ago | Non Equity Assistance | 2 | 340.0K | 221 | 1 year ago | |
|
|
|
NextPower360 | - | The World's Most Advanced Generator | NextPower360 develops generators and motors that are instantaneously adaptive to... | - |
United States
|
Asheville | United States (HQ) | 2022 | Renewable Energy, Clean Energy | [email protected] |
1
Low
|
5
|
646 | 10 months ago | Seed | 2 | 2.0M | 67 | 1 year ago | |
|
|
|
SICDRONE | - | Manufacturer of unmanned aircraft for commercial and defense use, where slow fli... | SICDRONE manufactures supermaneuverable and multimodular unmanned aircraft. Opti... | - |
United States
|
Portland | United States (HQ) + 1 | 2016 | Manufacturing, Privacy and Security +5 | [email protected] |
1
Low
|
8
|
732 (10%) | 5 years ago | Grant | 3 | 350.0K | 680 | 6 months ago | |
|
|
|
Photon Marine | - | High-powered electric outboard motors and intelligent energy management for mari... | At Photon, our vision is to preserve the planet’s waterways and oceans through t... | - |
United States
|
Portland | United States (HQ) + 1 | 2021 | Energy, Clean Energy +1 | [email protected] |
1
Low
|
17
|
923 (-100%) | 3 years ago | Seed | 4 | 2.0M | 1506 | 6 months ago |