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Venture - Series Unknown Clean Energy Companies

Explore 111 clean energy startups that raised venture - series unknown funding. Access verified founder contact information and fundraising data.

Total Companies
111
Total Funding
$680.1M
Avg Funding
$27.2M
Cities
23

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Palm Beach Gardens, United States
$20.0M
raised

Ampera is a clean energy company that offers fusion-powered, subcritical breeder reactor system for nuclear energy for the AI era.

Feb 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

El Segundo, United States

Radiant develops portable nuclear microreactors designed to generate electricity and heat in a compact, factory-built form.

Feb 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Barcelona, Spain
$11.9M
raised

WtEnergy operates as a clean energy startup.

Feb 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Salem, United States
$43.7M
raised

Lydian is the electric fuels company, developing the lowest cost SAF from CO2, water, and renewable energy in record time

Jan 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Hollister, United States

ZeroAvia develops hydrogen-electric powertrains for zero-emission aviation solutions.

Dec 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Stockholm, Sweden
$50.0M
raised

small modular reactors, clean energy, deep tech

Dec 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Brooklyn, United States
$15.0M
raised

Amogy offers carbon-free energy solutions using ammonia cracking technology.

Nov 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

London, United Kingdom
$170.9M
raised

Highview Power is a renewable energy company that develops liquid-air energy storage solutions for grid applications.

Nov 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Mississauga, Canada
$3.0M
raised

KMX Technologies provides membrane distillation technology to separate and recover valuable chemicals and water treatment.

Nov 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Lappeenranta, Finland

SpinDrive creates customized levitation technology pushing energy efficiency to the maximum level and promoting oil-free solutions.

Oct 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Copenhagen, Denmark

Simplify and Automate your Carbon Accounting

Oct 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Golden, United States
$1.9M
raised

Steelhead Composites is a provider of hydrogen storage solutions used to allow widespread zero-emission fuel cell electrification.

Oct 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Brooklyn, United States

HEVO provides a seamless, safe, and universal wireless charging solution for electric vehicles.

Sep 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

South San Francisco, United States
$101.3M
raised

Glydways designs and implements personal rapid transit systems using self-driving vehicles.

Sep 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Sheffield, United Kingdom
$6.8M
raised

mopo provides clean, affordable energy to the off-grid market in Africa.

Sep 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Valencia, Spain
$791K
raised

Ingelia is a technology-based company specializing in R & D in the renewable energy sector.

Sep 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Stockholm, Sweden
$174.3M
raised

Aira is a direct-to-consumer clean energy-tech company that provides heat pumps and home energy-saving solutions.

Aug 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Norwich, United Kingdom

WATR develops a water monitor that is self-powered, portable, easy to install, with a live data dashboard and notification alerts.

Aug 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Kastrup, Denmark

Copenhagen Atomics is a manufacturer of thorium reactors.

Jul 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Berkeley, United States
$33.0M
raised

Deep Isolation develops and commercializes technology to safely dispose of nuclear waste using deep horizontal boreholes.

Jul 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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South Windsor, United States
$355K
raised

OPM is a commercial company delivering fully functional end-use products to the biomedical, aerospace, and industrial markets.

Jul 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Oakville, Canada
$25.8M
raised

Terrestrial Energy is a developer of a reactor power plant technology to provide carbon-free energy for the global industry.

Jul 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Santa Cruz, United States
$7.5M
raised

Peregrine Hydrogen operates as a climate technology company.

Jul 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Madison, United States
$375K
raised

C-Motive Technologies is a venture-backed cleantech startup that develops electrostatic motor technology.

Jun 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

$13.6M
raised

HESS Ltd. is a technological solution provider, a pioneer in creating hybrid energy storage solutions for the electrical grid

May 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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