All Industries

Top Clean Energy Companies

217 Clean Energy companies, sorted by total funding raised.

Arcadia

Arcadia is a climate tech company providing advanced utility data platforms and AI-driven energy ...

Washington, United States501–1000Clean Energy, Data & Analytics
Series E·$405.0M·Apr 2024
Koloma

Data-driven natural hydrogen exploration company that identifies and produces low-carbon hydrogen...

Denver, United States51–200Climate Tech, Energy
Extension Round·$386.7M·Oct 2024
Beta TechnologiesIPO

BETA Technologies manufactures electric VTOL and CTOL aircraft, charging networks, and training f...

Burlington, United States501–1000Clean Energy, Manufacturing
Series C·$375.0M·Oct 2024
6K

Plasma reactor manufacturer for sustainable advanced materials and batteries.

North Andover, United States51–200Advanced Materials, Manufacturing
Series E·$366.9M·Sep 2024
Field

Accelerating the build out of the renewable infrastructure needed to reach net zero

London, United Kingdom51–200Clean Energy, Energy Storage
Corporate Round·$334.0M·Jul 2023
Amogy

Develops ammonia-to-power systems converting ammonia into hydrogen to provide carbon-free power f...

New York, United States51–200Clean Energy, Industrials
Venture Round·$332.0M·Jul 2025
Zap Energy

Nuclear fusion energy company developing compact, low-cost fusion reactors using sheared-flow-sta...

Everett, United States51–200Nuclear Fusion, Clean Energy
Series D·$324.0M·Sep 2024
Sun King

Sun King manufactures and sells solar lanterns and solar home systems to off-grid and under-elect...

Nairobi, Kenya1001–5000Climate Tech, Clean Energy
Growth Equity·$312.0M·Dec 2025
Panthalas

Develops ocean-deployed renewable energy platforms with embedded compute to supply low-cost, zero...

Portland, United States51–200Clean Energy, Cloud
Series B·$289.1M·May 2026
Span

Smart electrical panel that adds intelligence and control to home energy management.

San Francisco, United States51–200Clean Energy, Hardware
Corporate Round·$271.2M·Mar 2026
ZolarMerged

AI-first platform connecting homeowners and installers to design, buy, and manage residential sol...

Berlin, Germany11–50Clean Energy, Climate Tech
Growth Equity·$254.2M·Apr 2024
Nikola Corporation

Hydrogen-electric semi-truck developer and energy company.

Phoenix, United States501–1000Electric Vehicles, Clean Energy
Series D·$250.0M·Sep 2019
Ola ElectricIPO

Ola Electric is India's leading electric vehicle manufacturer, producing electric scooters and mo...

Bangalore, India501–1000Clean Energy, Mobility
Series B·$250.0M·Jul 2019
Energy Vault

Energy Vault develops utility-scale energy storage solutions including gravity-based, battery, an...

Westlake Village, United States201–500Clean Energy, Energy Storage
Series C·$210.0M·Oct 2021
CubicPV Inc. (1366 Technologies)Acquired

Solar technology company developing high-efficiency silicon wafers to reduce the cost of solar en...

Bedford, United States51–200Clean Tech, Energy
Growth Equity·$208.8M·Jun 2023
Proxima Fusion

Develops QI stellarators and designs fusion power plants, partnering with utilities and institute...

Munich, Germany51–200Clean Energy, Deep Tech
Series A·$193.7M·Sep 2025
Standard Nuclear

Manufacturer of TRISO nuclear fuel for advanced reactors, supplying utilities and reactor develop...

Oak Ridge, United States11–50Clean Energy, Nuclear Energy
Series A·$182.0M·Jan 2026
Volta ChargingAcquired

EV charging network operator offering free charging at popular commercial locations powered by br...

San Francisco, United States201–500Electric Vehicles, Clean Energy
Series D·$180.0M·Jan 2021
Heron Power Electronics

Heron Power designs solid-state transformers to modernize the electric grid, enabling greater ren...

Scotts Valley, United States11–50Clean Energy, Power Electronics
Series B·$178.0M·Feb 2026
PowinAcquired

Oregon-based utility-scale energy storage integrator providing battery systems and management sof...

Portland, United States201–500Clean Energy, Energy Storage
Growth Equity·$160.0M·Jul 2022
Thea Energy

Develops planar‑coil stellarator fusion systems delivering scalable, zero-emission power using ma...

Kearny, United States51–200Clean Energy, Energy
Series B·$160.0M·May 2026
H2Pro

Israeli startup developing affordable green hydrogen production technology that connects directly...

IsraelClean Energy, Hydrogen
Venture Round·$158.2M·Jan 2024
Zanskar

AI-native geothermal company that uses subsurface data and geoscience to find and develop utility...

Salt Lake City, United States51–200Artificial Intelligence, Clean Tech
Series C·$157.0M·Jan 2026
BlocPower

Designs, finances, and installs clean energy and efficiency upgrades for building owners and unde...

New York, United States51–200Clean Energy, Climate Tech
Series B·$155.0M·Mar 2023
Bloom EnergyIPO

Solid oxide fuel cell technology and products for distributed electricity and hydrogen generation

San Jose, United States1001–5000Clean Energy, Climate Tech
Venture Round·$150.0M·Sep 2011