36 Clean Energy companies in United States
36 Clean Energy companies in United States with 80 founders and decision-makers, led by San Francisco. 47 verified founder emails. Updated 2026-10-03.
Key findings
- FindMeMail tracks 36 Clean Energy companies in United States, with 80 founders and decision-makers listed.
- San Francisco is the top city, with 3 of them (8%), followed by Houston (2).
- The most common team size is 1-10 employees (81% of companies).
- 5 (14%) were founded in the last three years.
- 16 have a recorded funding round; the most common is Seed (4).
- 25 companies (69%) have at least one verified founder email, 47 verified emails in total.
Breakdown
Top cities
- San Francisco: 3 (8%)
- Houston: 2 (6%)
- San Diego: 2 (6%)
- Boston: 2 (6%)
- New York: 1 (3%)
- Boulder: 1 (3%)
- Dickinson: 1 (3%)
- Austin: 1 (3%)
Team size (employees)
- 1-10: 29 (81%)
- 11-50: 3 (8%)
- 1001-5000: 2 (6%)
- 101-250: 1 (3%)
- 251-500: 1 (3%)
Latest funding round
- Seed: 4 (11%)
- Equity Crowdfunding: 3 (8%)
- Venture - Series Unknown: 2 (6%)
- Grant: 2 (6%)
- Series A: 1 (3%)
- Debt Financing: 1 (3%)
- Series B: 1 (3%)
- Series E: 1 (3%)
Founded (last 10 years)
- 2017: 3 (8%)
- 2018: 1 (3%)
- 2019: 1 (3%)
- 2020: 2 (6%)
- 2022: 2 (6%)
- 2025: 5 (14%)
Recently added Clean Energy companies in United States
- Teragen Energy — Southborough, United States: Teragen Energy develops regenerative fuel cell systems that provide both power generation and energy storage.
- SpaceLoop Systems, Inc — Sparks, United States: SpaceLoop Systems offers a platform that uses atomic-level recycling to process industrial waste.
- Aadi Advisory — Washington, United States: Aadi Advisory is an energy consulting company that focuses on clean energy, regulation, and infrastructure investment.
- Engyx Digital Energy | RWAs — Delaware City, United States: Real-World Asset Tokenization for Renewable Energy, Carbon Credits, and Sustainable Infrastructure
- Nuclearis Energy — Wilmington, United States: Nuclearis Energy builds the N1 Micro Reactor, a factory-built SMR delivering reliable, carbon-free power with no need for refueling.
- FuelTrust — Dickinson, United States: Powering Better Decisions!
- EarthSmart Networks — Norwood, United States: EarthSmart Networks is a tech company working in energy management, automation, home health and more.
- ScarabTECH — Glenwood Springs, United States: ScarabTECH is a startup company that develops plastic-to-energy machines for plastic waste.
- Texas Electricity Ratings — Houston, United States: Texas Electricity Ratings is a customer advocacy site that features customer reviews and energy rates for deregulated energy markets
- Peak Prosperity — Sebastopol, United States: Peak Prosperity provides its users with insights on the future of the economy and advices accordingly.
- Renogy — Ontario, United States: Renogy is an online retailing company that provides solar panels and batteries.
- TurbineHub — Avon, United States: The Intelligence Infrastructure for Energy Markets
- Vata Verks — Boston, United States: Vata Verks offers non-invasive hi-res water and natural gas data acquisition solution for buildings.
- Redfeather Green Energy — Saratoga Springs, United States: Redfeather Green Energy Development (Redfeather) provides innovative financial strategies for building efficient clean energy project.
- Otto — Kearny, United States: Otto is an eco-friendly ridesharing app that pledges to have zero net CO2 contributions
- PVPower — Chicago, United States: PVPower is focused on serving solar power products and easily understood information on solar, photovoltaic power and solar energy.
- TRILLION — Houston, United States: Trillion is green fuel development & production company located in Houston Texas.
- Garden Answers — San Diego, United States: Garden Answers offers plant identification technology for mobile devices and expert advice from gardening experts.
- San Diego Community Power — San Diego, United States: San Diego Community Power is a non-profit organization that focuses on moving towards a healthier, sustainable, and clean energy future.
- Renew Health — San Francisco, United States: Renew Health’s mission is to fundamentally transform how medications are managed in the health care system.
- EcoFlow Tech — San Francisco, United States: EcoFlow provides designs, develops and manufactures eco-friendly and affordable portable power stations for personal and professional use.
- Arbor Energy — Los Angeles, United States: Arbor Energy is a clean power company that creates compact systems to generate clean, dependable electricity with zero emissions.
- Commonwealth Fusion Systems — Cambridge, United States: Commonwealth Fusion Systems designs and develops commercial fusion energy systems to produce clean energy.
- LanzaTech — Skokie, United States: LanzaTech is a carbon recycling company that converts waste carbon into sustainable fuels, chemicals, and materials.
- Oklo — Sunnyvale, United States: Oklo is a manufacturing company engaged in the production of renewable energy semiconductors.
- Wind Harvest International — Sacramento, United States: Wind Harvest International manufactures and sells unique wind turbines for large untapped renewable resources.
- Natrion — Binghamton, United States: Natrion is commercializing a new plug-and-play solid-state electrolyte component called LISIC that can be rapidly implemented by battery manufacturers into exi…
- Calicat — Chatsworth, United States: Calicat is a clean-energy company developing a proprietary electrocatalyst discovery process for electrolyser. The company electrocatalyst discovery is an unpr…
- Altaeros Energies — Boston, United States: Altaeros Energies develops airborne wind turbines to produce abundant, low-cost, renewable energy. The company manufactures buoyant airborne turbines, a renewa…
- Solight Design — New York, United States: Bringing Solar Innovation into Every Household
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Frequently asked questions
How many Clean Energy companies in United States are there?
FindMeMail currently lists 36 Clean Energy companies in United States with at least one founder or decision-maker identified. The count updates daily as new companies are added.
Where are most Clean Energy companies in United States based?
San Francisco (3), Houston (2), San Diego (2).
How do I contact founders of Clean Energy companies in United States?
47 verified founder emails are available for these companies on FindMeMail. Create a free account to get 50 free reveals, then buy one-time credit packs from $12.
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- E-Commerce companies in United States (1,545)
- SaaS companies in United States (1,304)
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- Financial Services companies in United States (1,062)
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- Internet companies in United States (824)
Methodology: counts include companies in the FindMeMail database with at least one identified founder or decision-maker. Data refreshes automatically as new companies are added.