All Industries

Top Clean Energy Companies

201 Clean Energy companies, sorted by total funding raised.

PRECISION COMBUSTION, INC.

R&D company with 91 SBIR/STTR awards from Department of Defense, Department of Energy, National A...

NORTH HAVEN, United States11–50Advanced Manufacturing, Chemical Manufacturing
Grant·$3.9M
Tensor EnergyClosed

Creating the operating system of our zero-carbon, distributed energy future

Fukuoka, Japan11–50Energy, Clean Energy
Pre-seed·$3.0M·Mar 2024
Stralis Aircraft

Emission free hydrogen electric aircraft

Brisbane, Australia1–10Aerospace, Clean Energy
Pre-seed·$2.0M·Jun 2023
Swift Coat

Swift Coat provides nanoparticle coatings.

Peoria, United States1–10Advanced Materials, Clean Energy
Grant·$1.9M·Jan 2020
LPP Fusion

Nuclear fusion startup developing safer atomic power

Middlesex, United States1–10Clean Energy, Deep Tech
Crowdfunding Equity·$1.8M·Nov 2025
Tobe Energy

Tobe Energy cuts green hydrogen production costs by over 50% with a breakthrough electrolysis tec...

Tulsa, United States1–10Clean Tech, Climate Tech
Funding undisclosed
Advent Technologies LLC

R&D company with 3 SBIR/STTR awards from Department of Defense.

Livermore, United States11–50Clean Energy, Defense Tech
Funding undisclosed
AIRLOOM ENERGY, INC.

R&D company with 1 SBIR/STTR awards from Department of Defense.

LARAMIE, United States1–10Clean Energy, Energy
Funding undisclosed
Transaera, Inc.

R&D company with 2 SBIR/STTR awards from National Science Foundation.

Cambridge, United States1–10Clean Energy, Climate Technology
Funding undisclosed
Green Independence

They guide the gradual transition from carbon-based industries to future sustainable systems by r...

Milan, Italy1–10Sustainability, Clean Energy
Bridge·$1.0M·Aug 2024
SunBorne

Sunborne Systems is a UK-based green fuel technology company developing ammonia-fuelled reactor t...

Oxfordshire, United Kingdom1–10Clean Energy, Climate Tech
Grant·$1.0M·Jan 2024
Molten Industries

Produces clean hydrogen and graphite from natural gas via high-temperature methane cracking power...

Oakland, United States1–10Clean Energy, Climate Technology
Series A·$756K·Jun 2024
Arinna

LAST CALL: the round and our allocation are oversubscribed -- closing early this week -- 10X ligh...

Stanford, United States1–10Clean Energy, Space Tech
Funding undisclosed
Capacitech Energy

Capacitech is a leader in high-power, space-efficient energy storage solutions. Our flexible Powe...

Orlando, United States1–10Sustainability, Clean Tech
Seed·$473K·Mar 2020
Cence Power Inc.

Industry leading direct current (DC) power distribution for LED lighting, telecom, and data centers

Markham, Canada11–50Energy, Clean Tech
Funding undisclosed
RenewGoClosed

Aftersale solutions for EV

Ho Chi Minh City, Vietnam1–10Fintech, Clean Energy
Pre-seed·$110K
Enlighten Innovations

Clean-energy technology company developing solutions for energy transition and decarbonization.

Calgary, CanadaEnergy, Clean Energy
Funding undisclosed
NanoXplore

Graphene manufacturer and supplier of high-volume graphene powder for industrial markets includin...

CanadaAdvanced Materials, Clean Energy
Funding undisclosed
ION Solar

Premium full-service residential solar installation company serving homeowners across multiple U....

Provo, United States501–1000Clean Energy, PropTech
Seed·Mar 2022
IE
Inertia Enterprises

Delivers clean energy with the world’s most powerful laser.

Clean Energy
Funding undisclosed
Mosaic Finance

Financing platform for residential solar installations, connecting homeowners with solar provider...

Oakland, United StatesClean Energy, Fintech
Funding undisclosed
SpotmyEnergy

SpotmyEnergy develops smart metering systems and energy management solutions.

11–50Clean Energy
Funding undisclosed
Gridtential

Rethinking the structure of traditional lead-acid batteries for lower-cost storage systems

Santa Clara, United States11–50Clean Energy
Funding undisclosed
Sympower

Independent flexibility services provider optimizing electricity systems through demand-side flex...

51–200Clean Energy
Funding undisclosed
NT-Tao

Fusion energy startup developing nuclear fusion technology.

11–50Clean Energy
Funding undisclosed