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Clean Energy Startups

Updated August 2026

Companies in the clean energy sector developing innovative solutions and technologies.

Explore 727 recently funded clean energy companies with verified founder contact information and fundraising data.

Total Companies
727
Total Funding
$1.9B
Avg Funding
$74.6M
Global Reach
11
countries

Top Cities for Clean Energy

Cambridge
Melbourne
Memphis
Oakland
South Yarra
Munich

Recently Funded Companies

Export
Cambridge, United States

Commonwealth Fusion Systems designs and develops commercial fusion energy systems to produce clean energy.

$1.0B raised
Jul 2026

Founder Contacts

41,000+ verified contacts

Melbourne, Australia

Allume Energy is a renewable energy technology company unlocking solar in the multi-tenanted market.

$2.4M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Memphis, United States

Graphyte offers carbon removal services by utilizing a carbon casting technology.

$30.0M raised
Jul 2024

Founder Contacts

41,000+ verified contacts

Oakland, United States

Smarter Solar Deployment—From Planning to Power

$12.0M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

South Yarra, Australia

Octopus Australia is a renewable energy developer and fund manager harnessing capital and expertise to accelerate the energy transition.

$651.3M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Munich, Germany

VoltStorage develops and produces solar energy storage systems based on the eco-friendly Redox Flow Battery technology.

$33.1M raised
Jul 2023

Founder Contacts

41,000+ verified contacts

Kearny, United States

Thea Energy is an energy company that develops fusion energy technology to simplify the construction and operation of fusion power systems.

$20.0M raised
Jul 2026

Founder Contacts

41,000+ verified contacts

Bergen, Norway

Fuella is a pure-play developer of large-scale green hydrogen projects.

$22.0M raised
Jul 2023

Founder Contacts

41,000+ verified contacts

Besançon, France

CLHYNN is an industrial deep tech startup, offering the next gen. of decentralized electricity for mobility and stationary applications

$1.7M raised
Jul 2023

Founder Contacts

41,000+ verified contacts

Chicago, United States

Haylon Technologies is enabling a new class of ultra-efficient battery packs.

Jul 2023

Founder Contacts

41,000+ verified contacts

New York, United States

Aircela turns CO2 into green fuels, using direct air capture (DAC) and renewable energy.

$5.5M raised
Jul 2022

Founder Contacts

41,000+ verified contacts

London, United Kingdom

Renewabl is a climate-tech software company.

Jul 2024

Founder Contacts

41,000+ verified contacts

Boston, United States

Altaeros Energies develops airborne wind turbine to produce abundant, low cost, renewable energy.

$34.8M raised
Jul 2022

Founder Contacts

41,000+ verified contacts

Kastrup, Denmark

Copenhagen Atomics is a manufacturer of thorium reactors.

Jul 2025

Founder Contacts

41,000+ verified contacts

Hamburg, United States

Aerovec is a renewable electrical energy provider developing small wind turbine technology.

$139K raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Colne, United Kingdom

Patch App intends to digitally transform the window cleaning business.

$2.0M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Seattle, United States

Pacific Northwest Hydrogen Association aims to enhance lives by establishing a clean hydrogen ecosystem throughout the Pacific Northwest.

$27.5M raised
Jul 2024

Founder Contacts

41,000+ verified contacts

Boston, United States

Reservoir provides smart heat pump water heaters with connected energy management and thermal storage.

$5.0M raised
Jul 2026

Founder Contacts

41,000+ verified contacts

Calgary, Canada

Revolutionizing bitumen recovery with biomass-derived solvents produced from forestry and agricultural biomass.

$3.4M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Dublin, Ireland

Fusion Fuel is into production of green hydrogen.

$4.3M raised
Jul 2025

Founder Contacts

41,000+ verified contacts

Cambridge, United States

Solstice provides turnkey customer solutions for shared solar.

Jul 2024

Founder Contacts

41,000+ verified contacts

Barcelona, Spain

Electricty from nature.

$521K raised
Jul 2022

Founder Contacts

41,000+ verified contacts

Baltimore, United States

Solar4Us is an energy company, which aids the low income households to reduce the energy burden and convert it into clean energy.

$370K raised
Jul 2023

Founder Contacts

41,000+ verified contacts

Viljandi, Estonia

Solarstone develops and produces building-integrated PV (BIPV) solutions that promote sustainable building principles

$10.2M raised
Jul 2022

Founder Contacts

41,000+ verified contacts

Cary, United States

Sustaera offers a direct air capture solution that works ranging from open grasslands to arid deserts to tropical savannas.

Jul 2022

Founder Contacts

41,000+ verified contacts

Showing 101 to 125 of 727 companies

About the Clean Energy Startup Ecosystem

The clean energy sector is an active area of startup innovation and venture capital investment. Companies in this space are developing new technologies, platforms, and services that address evolving market needs and create new business opportunities.

Funding Trends in Clean Energy

Clean Energy companies raise capital across various funding stages, from early seed rounds to late-stage growth financing. Investor interest in this sector is driven by the size of the addressable market, the pace of technology adoption, and the potential for scalable business models.

Growth Outlook

The clean energy sector is expected to continue evolving as technology advances, market dynamics shift, and new opportunities emerge. Companies that demonstrate strong product-market fit, efficient growth, and clear competitive advantages are well-positioned to attract continued investment.

Clean Energy Funding Breakdown

Here is how funding is distributed among the 727 clean energy companies tracked in the VCBacked database.

Average Funding
$74.6M
Total Funding Tracked
$1.9B
Countries Represented
11

Distribution by Funding Stage

Other25 companies

Top Cities for Clean Energy

1.Cambridge
2 companies$1.0B
2.Boston
2 companies$39.8M
3.Melbourne
1 companies$2.4M
4.Memphis
1 companies$30.0M
5.Oakland
1 companies$12.0M

Related Industries

Companies in the clean energy sector often overlap with or complement businesses in adjacent industries. Exploring related verticals can help you discover additional companies, identify partnership opportunities, and understand the broader competitive landscape.

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