Top 100 Energy Startups 2026

Venture-backed energy companies — generation, storage, grid, and fuels — ranked by total funding raised.

As of September 2026, these 100 companies have raised $45.3B in combined funding.

Showing top 100 of 514 matching companies · Ranked by total funding raised · Data updated Sep 14, 2026

Methodology: 514 active companies matched this list's filters; the top 100 are ordered by disclosed total funding in USD. Every figure links to the company profile that cites its source. How this data is built.

1

Oryx is a full-service Permian Basin midstream company offering producers customer-focused servic...

Midland, United States51–200Energy

Growth Equity·$4.2B·Aug 2019

2

Commonwealth Fusion Systems

MIT spinout developing compact fusion energy plants using high-temperature superconducting magnet...

Devens, United States501–1000Climate Tech, Energy

Venture Round·$3.9B·Jul 2026

3

AEP Transmission

AEP Transmission develops electric infrastructure and energy solutions with utilities, communitie...

Columbus, United States10001+Energy, Infrastructure

Growth Equity·$2.8B·Jan 2025

4

Home battery and energy company that provides distributed power storage to reinforce the electric...

Austin, United States51–200Clean Energy, Clean Tech

Series D·$2.3B·Aug 2026

5

SVOLT Energy Technology is a global manufacturer of battery cells, modules, and energy storage sy...

Changzhou, China10001+Climate Tech, Automotive

Series B·$1.6B·Feb 2021

6

TAE Technologies

Fusion energy company developing clean energy solutions.

Foothill Ranch, United States201–500Energy, Deep Tech

Corporate Round·$1.5B·Dec 2025

7

Nuclear fusion energy company building the world's first commercial fusion power plant; has a 50 ...

Everett, United States201–500Clean Energy, Climate Tech

Series G+·$1.5B·Jun 2026

8

Carbon transformation company that converts CO2 into essential products like sustainable aviation...

Berkeley, United States201–500Carbon Capture, Clean Tech

Series C·$1.4B·Dec 2025

9

Slate makes affordable electric pickup trucks that owners can customize and reconfigure as their ...

Troy, United States201–500Energy, Electric Vehicles

Series C·$1.4B·Apr 2026

10

Clean Energy, Energy

Growth Equity·$1.3B·Jun 2023

11

Actis Energy 3C Sub-Feeder

The team has built the Actis Energy 3 (AE3) fund to invest in electricity generation and distribu...

London, United KingdomEnergy, Infrastructure

Growth Equity·$1.1B·Sep 2013

12

VoltaGrid delivers firm, off-grid power, fuel, infrastructure, and energy management services to ...

Houston, United States201–500Climate Tech, Energy

Growth Equity·$1.1B·May 2026

13

Kraken Technologies

AI-powered operating system for energy, water, and telecom utilities that provides customer manag...

London, United Kingdom1001–5000Energy, Artificial Intelligence

Growth Equity·$1.0B·Dec 2025

14

Pacific Fusion was founded in 2023 to develop pulsed magnetic inertial fusion for abundant, affor...

Fremont, United States51–200Energy

Series A·$900.0M·Oct 2024

15

Multiverse Computing

Multiverse Computing develops AI model-compression software that lets organizations deploy effici...

Tokyo, Spain51–200Energy

Series C·$823.2M·Jul 2026

16

Source-to-pay platform for energy companies, combining software and services to manage vendors, w...

Austin, United States501–1000Energy, HR Tech

Series E·$678.6M·May 2021

17

Solar developer that provides landowners and businesses guaranteed long-term lease payments to ho...

Clean Energy, Energy

Venture Round·$670.0M·Jan 2026

18

Mainspring Energy

Developer of linear generator technology providing flexible, fuel-agnostic onsite power generatio...

Menlo Park, United States51–200Energy, Climate Tech

Series F·$643.0M·Apr 2025

19

Electric Hydrogen

Manufacturer of high-power PEM electrolyzers that produce the lowest-cost green hydrogen for indu...

Devens, United States201–500Climate Tech, Energy

Series C·$602.0M·Oct 2023

20

Source-to-pay platform and staffing vendor network that helps energy companies find, onboard, and...

Austin, United States501–1000Energy, HR Tech

Series E·$600.0M·May 2021

21

EV charging solutions provider powering CPOs, public transit systems, logistics fleets, and retai...

Zurich, Switzerland1001–5000Climate Tech, Automation

Venture Round·$567.0M·Feb 2023

22

General Matter develops scalable, cost-competitive uranium enrichment technology to strengthen do...

San Francisco, United States1–10Energy, Infrastructure

Venture Round·$550.0M·Mar 2026

23

EV charging network and station provider for home, commercial, and fleet use across North America.

Montreal, Canada201–500Electric Vehicles, Energy

Series E·$536.0M·Jun 2024

24

Fever provides energy companies an operating system to connect distributed assets, run portfolios...

Madrid, Spain1001–5000Energy, Entertainment

Series F·$515.3M·Jun 2025

25

PhysicsX develops AI-native engineering software that helps industrial organizations accelerate s...

London, United Kingdom51–200Artificial Intelligence, Automotive

Series C·$484.0M·Jun 2026

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