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Venture - Series Unknown Clean Energy Companies

Explore 104 clean energy startups that raised venture - series unknown funding. Access verified founder contact information and fundraising data.

Total Companies
104
Total Funding
$379.0M
Avg Funding
$15.2M
Cities
25

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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

Henderson, United States

ECO Integrated Technologies is a cleantech company that produces water alternative and solid waste conversion.

Feb 2023
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

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

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

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

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

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

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41,000+ verified emails
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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

Zúrich, Switzerland
$2.7M
raised

MPower Ventures is a technology company that offers funding, software, and solar products to facilitate energy access in emerging markets.

Mar 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Montreal, Canada
$55.0M
raised

Dcbel specializes in smart home energy systems that empower users to manage their energy supply through a single device.

Mar 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Charlottesville, United States
$2.8M
raised

Lumin is a responsive energy management company.

Jan 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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San Diego, United States
$23.5M
raised

Sonocharge Energy develops a technology that enables batteries to charge.

Jan 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Tallinn, Estonia
$6.1M
raised

Elcogen is a manufacturer of clean energy technology that delivers affordable green hydrogen and emission-free electricity.

Jan 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Fort Collins, United States
$13.1M
raised

Prieto Battery manufactures lithium ion batteries based on tiny or nanostructured materials.

Jan 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Edinburgh, United Kingdom
$638K
raised

Carbogenics is a cleaning technology company.

Dec 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Berlin, Germany

Ecoligo is an impact investment provider, implementing solar energy solutions that generate economic and environmental returns.

Nov 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Vancouver, Canada

Ionomr makes Aemion‚Ñ¢ & Pemion‚Ñ¢, next-gen ion-exchange materials for breakthrough clean technology applications involving electrochemistry.

Oct 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Berne, Switzerland
$69.0M
raised

Neustark is a concrete producer in bern using wastewater treatment plant by turning CO2 into minerals.

Jun 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Orange, United States
$700K
raised

Hyperion Companies develops hydrogen fuel cells, energy storage, and advanced mobility solutions.

Jun 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

London, United Kingdom
$7.7M
raised

Rendesco's mission is to transform the heating business by creating geothermal networks using ground-source heat pump technology.

Jun 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Göteborg, Sweden
$6.4M
raised

Modvion develops modular wind power towers in composite materials.

Jun 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Showing 51 to 75 of 104 companies

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104 Clean Energy Venture - Series Unknown Startups (September 2026) — Page 3 | VCBacked