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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
$224.7M
Avg Funding
$9.0M
Cities
23

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Brighton, United States

Global Thermostat develops and commercializes a technology for the direct capture of carbon dioxide from the atmosphere.

May 2023
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

$1.7M
raised

Northern Smilodon Energy offers services like access to the Montney play, light oil resources, sourcing, and securing of oil and gas assets.

May 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Carlsbad, United States
$6.5M
raised

The operating system for advanced battery chemistries

May 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

New York, United States
$6.4M
raised

Carbon conversion technology bolts onto ANY source of carbon dioxide emissions converts the pollution into clean natural gas StandardRNG

May 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Somerville, United States

Sublime Systems develops technology to decarbonize cement-making.

May 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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San Francisco, United States
$700K
raised

Lumen Energy focuses on helping building owners save money with clean energy.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Palo Alto, United States
$4.7M
raised

Rune Energy is a developer of a computation technology intended to monetize underutilized and surplus clean power.

Apr 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Utrecht, The Netherlands
$30.8M
raised

Iwell is a manufacturing company that offers smart storage solutions and batteries for sustainable and affordable energy supply.

Apr 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Boulder, United States

Electra is a a clean iron company that uses a low-temperature, electrochemical-hydrometallurgical system to refine iron ore.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Santa Clara, United States
$55.4M
raised

Natron Energy is an energy storage company that develops sodium ion battery solutions leveraging Prussian Blue electrode materials.

Apr 2025
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Newark, United States
$3.9M
raised

NovaSolix develops an energy technology designed to generate a clean and low-cost form of energy.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

San Francisco, United States

Symbium's Citizen's Dashboard incorporates zoning & building regulations so that anyone can obtain a permit in seconds!

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Saint-sulpice, Switzerland
$19.2M
raised

Daphne Technology is a developer of a sustainable, technically advanced and cost efficient air emissions control system.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Stockholm, Sweden
$4.2M
raised

Bright Energy is a Swedish electricity company that offers companies and households hourly rates on electricity.

Apr 2022
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

San Diego, United States

EFG is an innovative change in the portable generator and independent energy market converting hydrogen-on-demand to electricity.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
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Watertown, United States

Via Separations is a technology company that develops membrane materials for modular and resource separation solutions.

Apr 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Cambridge, United Kingdom
$2.3M
raised

Pulsiv develops world-leading electronic solutions for AC to DC Power Supplies and Solar Energy applications.

Mar 2024
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Brighton, United States
$15.0M
raised

A cleantech telecommunications infrastructure start-up.

Mar 2022
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Vilnius, Lithuania

Viezo is a tech start-up company that specializes in energy harvesting technology that convert vibrations into electricity.

Mar 2023
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

London, United Kingdom

Heat Geek is a designer and installer of energy systems.

Mar 2026
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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41,000+ verified emails
Unlimited exports
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Vantaa, Finland
$1.4M
raised

Themo is a smart thermostat cleantech company.

Mar 2024
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

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

Del Valle, United States
$475K
raised

Locoal is a climate technology company that utilizes materials to generate renewable clean energy while capturing carbon.

Feb 2022
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

Madrid, Spain
$40.0M
raised

Oryx Power invests in, develops, and manages renewable energy assets.

Feb 2022
Venture - Series Unknown

Founder Contacts

41,000+ verified contacts

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