All Industries

Top Clean Energy Companies

217 Clean Energy companies, sorted by total funding raised.

Enchanted Rock

Provider of electrical resiliency-as-a-service using modular dual-purpose microgrids for commerci...

Houston, United States201–500Clean Energy, Microgrids
Series A·$10.0M·Feb 2017
VFlowTech

Vanadium flow battery energy storage systems for long-duration storage applications.

Singapore, Singapore11–50Clean Energy, Energy Storage
Series A·$10.0M·Feb 2023
Rock Rabbit

AI-powered platform simplifying clean energy incentives and home electrification rebates for home...

United States1–10Clean Energy, Artificial Intelligence
Series A·$9.1M·Nov 2024
ElectricFish

Distributed energy storage for EV charging, and grid-scale energy backup.

Fremont, United States11–50Clean Tech, Manufacturing
Grant·$8.3M·Apr 2023
Kanin Energy

Canadian cleantech company converting industrial waste heat into clean baseload electricity via E...

Calgary, Canada1–10Energy, Waste Heat
Seed·$7.5M·Jan 2021
Boundary Layer

Builds high-speed zero-emission container ships using advanced electric hydrofoil technology.

Alameda, United StatesClean Energy, Maritime
Series A·$7.1M·Jun 2022
ChargeUp

Electric vehicle charging infrastructure and battery swapping network in India.

Delhi, India51–200Clean Energy, Electric Vehicles
Series A·$7.0M·Nov 2022
Rensair

Provides smart commercial air purifiers using HEPA, VOC filtration, and UVC light for clean indoo...

London, United Kingdom11–50Clean Energy, Hardware
Series A·$7.0M·May 2022
Milvus Advanced

Materials science company developing novel nanomaterials that replace scarce and costly platinum ...

United KingdomClean Energy, Deep Tech
Seed·$6.9M·Oct 2025
Pranos Fusion

Deep-tech startup developing compact fusion reactor technology for clean energy

Bengaluru, India11–50Clean Energy, Deep Tech
Seed·$6.8M·Mar 2026
Nextron Energia

Energy-as-a-service clean-tech platform for renewable energy in Brazil.

São Paulo, Brazil51–200Clean Tech, Energy
Series A·$6.0M·Mar 2024
Active Surfaces

Flexible solar panel manufacturer for building-integrated photovoltaics.

Woburn, United States1–10Clean Energy, Renewable Energy
Pre-seed·$5.6M·May 2024
Elementl Power

Advanced nuclear project developer and independent power producer building scalable pathways for ...

Washington, United States1–10Nuclear Energy, Clean Energy
Seed·$5.0M·Jan 2022
Oxylus Energy

Oxylus is an e-methanol company working on CO2 electrolysis.

New Haven, United States1–10Energy, Carbon Capture
Seed·$4.5M·Sep 2024
AEinnova

Green revolution for Industry 4.0.

Barcelona, Spain11–50Clean Energy, Clean Tech
Growth Equity·$4.5M·Jan 2023
Arinna

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

Stanford, United States1–10Clean Energy, Space Tech
Seed·$4.0M·Mar 2026
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
BluWave-ai

AI-powered smart grid optimization platform for utilities.

Ottawa, Canada11–50Artificial Intelligence, Energy
Seed·$3.9M·Sep 2019
Vaja

Stockholm-based developer of vertical single-axis solar tracking systems for higher energy yield.

Stockholm, Sweden51–200Clean Energy, Solar Technology
Seed·$3.4M·Jun 2026
Tensor EnergyClosed

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

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

Clean energy startup.

Pune, United States11–50Clean Energy, Climate Tech
Series A·$3.0M·Apr 2026
Avoltra

German AI-powered energy procurement platform helping industrial companies manage energy purchasi...

Berlin, Germany1–10Climate Tech, Clean Energy
Pre-seed·$2.5M·Jul 2025
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
Equity Crowdfunding·$1.8M·Nov 2025