All Rankings

Top 100 Energy Startups 2026

Private energy companies whose latest recorded funding type is not a grant, private equity, or debt financing, ranked by disclosed lifetime funding.

Known total funding for 100 of 100 ranked companies: $47.3B.

Showing top 100 matching companies · Ranked by total funding raised

Use company data through the API.
Example request
curl "https://indexed.vc/api/v1/companies?industries=Energy&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API has no company type filter, so public companies can appear; this list counts private companies only.

The API cannot leave out companies whose latest round is a grant, private equity or debt financing; this list does.

Data from Indexed.vcUpdated

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant, Private Equity, Debt Financing are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

76
Marvel Fusion

Munich-based fusion energy company developing laser-driven inertial fusion power plants for indus...

Munich, Germany51–200Deep Tech, Energy
Extension RoundTotal funding$122.8MMar 2025
77
Flexiv Robotics

Flexiv is a global leading robotics and AI company, focusing on developing and manufacturing adap...

San Francisco, United States51–200Energy
Series CTotal funding$122.0MJun 2025
78
Infogrid

AI-powered building intelligence platform using IoT sensors to help facilities managers and real ...

London, United KingdomEnergy, IoT
Extension RoundTotal funding$118.5MApr 2024
79
Skan AI

Skan AI observes enterprise workflows and builds a context graph that helps AI agents automate co...

San Francisco, United States51–200Energy, Artificial Intelligence
Series CTotal funding$117.0MAug 2026
80
Enechain

enechain operates Japan's largest energy marketplace, where businesses trade electricity, fuels, ...

Tokyo, Japan51–200Energy, Fintech
Venture RoundTotal funding$113.9MApr 2026
81
Insight M

Insight M is a consultative methane emissions management company helping oil and gas operators de...

Sunnyville, United States51–200Energy, Sustainability
Series ETotal funding$110.4MJun 2025
82
RS Composite Utility Poles

Manufacturer of composite utility poles and structures that enable resilient, sustainable grid in...

Calgary, Canada51–200Energy, Infrastructure
Venture RoundTotal funding$105.6MOct 2022
83
EcoFlow Tech

EcoFlow is a portable power and energy company founded in 2017 by entrepreneurs from a leading dr...

Seattle, United States1001–5000Clean Energy, Clean Tech
Series BTotal funding$104.0MJun 2021
84
Zeno Power

Develops radioisotope nuclear batteries delivering multi-year power for space missions and subsea...

Seattle, United States51–200Defense Tech, Energy
Series BTotal funding$103.4MMay 2025
85
BBOXX

A data-driven super platform transforming lives and unlocking potential by connecting consumers a...

Kigali, Kenya1001–5000Climate Tech, Energy
Series DTotal funding$101.0MAug 2019
86
Aspen Energy Partners

Invests in small- to mid-cap oilfield services and technology companies

Arvada, United States1–10Energy, Oil & Gas
SeedTotal funding$100.0MJan 2016
87
Kanin Energy

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

Calgary, Canada1–10Clean Energy, Climate Tech
Venture RoundTotal funding$100.0MSep 2026
88
PosiGen

PosiGen is restructuring its business and transferring customer support services to third-party p...

Clean Energy, Climate Tech
Growth EquityTotal funding$100.0MJan 2022
89
Radiance Renewables

Indian renewable energy company developing solar and wind infrastructure.

Mumbai, India501–1000Climate Tech, Energy
Growth EquityTotal funding$100.0MFeb 2026
90
Substrate

Building America's next-generation semiconductor foundry using advanced X‑ray lithography to redu...

San Francisco, United States51–200Energy, Hardware
SeedTotal funding$100.0MOct 2025
91
Verdagy

Manufactures dynamic alkaline electrolysis systems for large-scale green hydrogen production, pai...

Moss Landing, United States11–50Clean Tech, Energy
Series BTotal funding$98.0MAug 2023
92
Aurora Labs

Aurora Labs builds LOCI, an execution-intelligence platform that analyzes compiled software behav...

Tokyo, Israel51–200Energy, Artificial Intelligence
Series CTotal funding$94.4MJul 2022
93
Amperesand

Amperesand builds a solid state transformer platform for AI data centers and critical infrastruct...

Singapore, United States11–50Climate Tech, Energy
Series ATotal funding$92.5MNov 2025
94
24M Technologies

24M Technologies develops battery technologies with energy storage system integrators, electric v...

Cambridge, United States201–500Energy, Energy Storage
Series G+Total funding$87.0MSep 2024
95
Newcleo

Newcleo is an innovator in the field of nuclear energy, launched in 2021 with substantial private...

Paris, Italy501–1000Energy
Venture RoundTotal funding$85.0MFeb 2026
96
Validere

Validere is the enterprise intelligence platform for the energy industry, giving organizations cl...

Toronto, Canada51–200Climate Tech, Energy
Series BTotal funding$85.0MMar 2022
97
Zesty.ai

ZestyAI is a decision intelligence platform that helps P&C insurers underwrite and price with pro...

San Francisco, United States51–200Energy, Analytics
Series BTotal funding$81.0MJul 2022
98
Verse

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

San Francisco, United States51–200Artificial Intelligence, Energy
Series BTotal funding$80.3MJun 2026
99
First Light Fusion

UK inertial confinement fusion research company developing clean energy through FLARE fusion appr...

Oxfordshire, United Kingdom51–200Clean Tech, Energy
Venture RoundTotal funding$79.1MApr 2026
100
Alsym Energy

Alsym Energy develops non-flammable, high-performance, American-made battery alternatives to lith...

Woburn, United States51–200Energy
Series BTotal funding$78.0MApr 2024