All Industries

Top Energy Companies

2,316 Energy companies, sorted by total funding raised.

Nira Energy

Helps renewable energy developers make smarter siting and queue decisions by modeling grid capaci...

Denver, United States11–50Climate Tech, Energy
SeedTotal funding$65.5MMay 2025
Pioneer TransformersAcquired

Designs and manufactures custom liquid-filled power transformers up to 25 MVA for utilities, indu...

Granby, Canada201–500Energy, Manufacturing
Private EquityTotal funding$65.5MJul 2019
Sepio

Zero trust hardware security platform providing complete visibility and control over connected as...

Israel51–200Cybersecurity, Energy
Extension RoundTotal funding$65.5MAug 2024
Arbor

Clean energy company founded by ex-SpaceX engineers building modular oxy-combustion turbines that...

Los Angeles, United States11–50Climate Tech, Energy
Series ATotal funding$64.0MOct 2025
OhmconnectAcquired

Provider of a real-time energy monitoring platform designed to increase energy efficiency. The co...

San Francisco, United States51–200Energy
Series DTotal funding$63.5MJun 2022
NuScale Power CorporationIPO

Publicly traded American company designing and marketing small modular reactors (SMRs), headquart...

Tigard, United States201–500Energy, Manufacturing
Series CTotal funding$62.6MJul 2021
CustomCellsAcquired

Develops and industrializes premium battery cells and cell technology for automotive, aviation, m...

Itzehoe, Germany51–200Energy, Energy Storage
Series ATotal funding$60.0MDec 2022
ZoozAcquired

EV charging infrastructure company using flywheel-based kinetic energy storage to enable ultra-fa...

Lod, Israel11–50Fintech, Payments
Venture RoundTotal funding$60.0MJan 2024
Verse

Energy infrastructure platform accelerating data center power connections for the AI economy.

San Francisco, United States51–200Artificial Intelligence, Energy
Series BTotal funding$59.8MJun 2026
BriqScore

Predict Oil & Gas Production Activity Using AI and Satellites.

San Francisco, United States1–10Artificial Intelligence, Data & Analytics
SeedTotal funding$59.0MMay 2026
Renaissance Fusion

Builds stellarators — the most efficient, steady, and stable fusion reactors on earth — to delive...

Grenoble, France51–200Clean Tech, Energy
Series ATotal funding$58.8MMar 2025
Lydian Labs

Lydian Labs aims to revolutionize the thermal catalytics process to decarbonize the chemicals ind...

Cambridge, United States11–50Energy, Climate Tech
Series ATotal funding$58.7MJan 2026
Mantle

Mantle’s TrueShape™ technology prints, shapes, and sinters precision metal parts from a CAD file ...

San Francisco, United StatesEnergy
Series CTotal funding$58.0MJul 2024
Leap

Platform for building and scaling virtual power plants, connecting distributed energy resources t...

San Francisco, United States51–200Clean Energy, Energy
Extension RoundTotal funding$57.7MNov 2023
Properly

Residential real estate marketplace

Canada51–200Energy
Extension RoundTotal funding$57.0MAug 2022
STEP Energy ServicesAcquired
Energy, Industrials
Growth EquityTotal funding$56.3MApr 2018
SolsticeAcquired

Solstice radically expands access to clean energy by providing community-shared solar power to th...

Boston, United States11–50Clean Tech, Climate Tech
Series ATotal funding$55.8MMay 2026
Powergen Renewable Energy
Energy, Renewable Energy
Series CTotal funding$54.5MJan 2025
ClarosAcquired

Builds hardware and software that optimize power delivery for data centers and AI infrastructure ...

McLean, United States11–50Artificial Intelligence, Energy
SeedTotal funding$52.7MMar 2026
CORNERSTONE RESEARCH GROUP INC

R&D company with 233 SBIR/STTR awards from Department of Defense, Department of Energy, National ...

MIAMISBURG, United States51–200Aerospace, Defense Tech
GrantTotal funding$51.2MSep 2025
AquamAcquired

Aquam Corporation provides pipeline infrastructure technology and inspection services for water a...

United StatesEnergy, Infrastructure
Series ATotal funding$51.0MJun 2026
Liberation Labs

Climate and energy sustainability company developing next-generation fermentation infrastructure.

Richmond, United States11–50Climate Tech, Energy
ConvertibleTotal funding$50.5MJan 2025
LIQUIDPISTON, INC

R&D company with 8 SBIR/STTR awards from Department of Defense.

Bloomfield, United States11–50Aerospace, Defense Tech
SeedTotal funding$50.4MMar 2026
NeoLithica
CanadaAdvanced Materials, Energy
ConvertibleTotal funding$50.0MMar 2026
OpenLegacy

Instantly Integrate Core Systems to the Cloud- Enabling organizations with legacy systems to rele...

Tokyo, United States51–200Energy, Developer Tools
Series CTotal funding$50.0MFeb 2020