All Industries

Top Clean Energy Companies

217 Clean Energy companies, sorted by total funding raised.

Advanced Microgrid SolutionsAcquired

AI-driven energy storage and microgrid software platform for commercial, industrial, and utility ...

San Francisco, United States51–200Clean Energy, Artificial Intelligence
Series B·$52.0M·Jul 2017
SDCL

Sustainable Development Capital LLP is a developer, investor and fund manager focused on energy e...

London, United Kingdom11–50Climate Tech, Clean Energy
Corporate Round·$50.0M·Jun 2024
SES AIIPO

AI-enhanced lithium-metal battery developer accelerating the energy transition through material d...

Woburn, United States201–500Energy Storage, Clean Energy
Series D·$50.0M·May 2021
Erthos

Utility-scale earth-mounted solar PV company that lays panels flat on the ground to reduce costs ...

Tempe, United States51–200Energy, Clean Energy
Series A·$48.0M·Sep 2023
Stem

Provides AI-driven software and managed services to optimize solar and battery energy assets for ...

San Francisco, United States501–1000Artificial Intelligence, Clean Energy
Series B·$45.2M·Dec 2013
Genomines

Biotech startup using plants to extract battery-grade nickel as a clean alternative to traditiona...

Paris, FranceBiotech, Clean Energy
Series A·$45.0M·Sep 2025
InnowattsAcquired

AI-powered energy analytics platform providing forecasting and consumer insights to utilities, en...

Houston, United States51–200Artificial Intelligence, Energy
Series B·$45.0M·Feb 2021
Realta Fusion

Develops compact, scalable modular fusion energy systems for industrial heat and power, targeting...

Madison, United States11–50Clean Energy, Deep Tech
Series A·$45.0M·May 2025
ev.energy

Smart EV charging platform enabling utilities and energy providers to manage grid load through in...

London51–200Electric Vehicles, Clean Energy
Series B·$41.8M·Jul 2023
Whisper Aero

Develops ultra-quiet, efficient electric propulsion systems for aircraft and drones, serving aero...

Crossville, United States51–200Aerospace, Clean Energy
Series A·$39.5M·Apr 2023
Solar JunctionAcquired

Developing high efficiency triple junction solar cells

San Jose, United States51–200Clean energy, Photovoltaics
Venture Round·$39.4M·Apr 2013
Fourth Power

Develops utility-scale thermal energy storage using liquid metal and TPV to deliver low-cost, lon...

Cambridge, United States1–10Clean Energy, Climate Tech
Series B·$39.0M·Sep 2025
myenergi

UK manufacturer of eco-smart home energy management devices including the zappi EV charger and so...

Market Rasen, United Kingdom201–500Clean Energy, Electric Vehicles
Growth Equity·$37.5M·Oct 2023
SkipAcquired

Electric scooters for reliable last-mile transportation.

San Francisco, United States1–10Transportation, E-Commerce
Seed·$36.0M·Nov 2024
Spiritus

Climate tech startup developing Direct Air Capture technology to remove CO2 from the atmosphere a...

United StatesClean Energy, Climate Tech
Series A·$33.6M·Mar 2025
Metafuels

A Zurich-based clean energy startup developing proprietary technology to convert green methanol i...

Zurich, Switzerland1–10Aerospace, Clean Energy
Series A·$32.0M·Feb 2026
Anthro Energy

Develops polymer electrolytes and lithium-ion battery cells that improve safety, energy density, ...

San Jose, United States11–50Clean Energy, Energy Storage
Grant·$30.7M·Mar 2025
Flux Marine

Advancing electric marine propulsion technology

Bristol, United States11–50Clean Energy, Electric Vehicles
Series B·$30.5M·Nov 2025
AIRLOOM ENERGY, INC.

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

LARAMIE, United States1–10Clean Energy, Energy
Seed·$30.4M·Oct 2024
Carbon America

Carbon America is a vertically integrated developer of carbon capture and sequestration (CCS) pro...

Arvada, United States11–50Climate Tech, Carbon Capture
Series A·$30.0M·Dec 2021
Carbon Energy

Carbon Energy let's you keep your business carbon free. We provide CDR credit based on our DAC(D...

San Francisco, United States1–10Carbon Capture, Clean Energy
Growth Equity·$30.0M·Jul 2011
Angaza

Financing solutions for life-changing devices

San Francisco, United States51–200Clean Tech, Fintech
Series B·$29.5M·Oct 2020
NT-Tao

Fusion energy startup developing nuclear fusion technology.

11–50Clean Energy
Series A·$28.0M·Jan 2023
Gridtential

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

Santa Clara, United States11–50Clean Energy
Venture Round·$25.6M·Apr 2021
C2X

Scale-up established in 2023

DenmarkClean Energy, Climate Tech
Venture Round·$25.0M·Mar 2022