All Rankings

Top Climate Hardware Companies 2026

Companies building hardware for climate tech, clean tech and clean energy, ranked by total funding raised.

Known total funding for 84 of 100 ranked companies: $10.3B.

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=Hardware,Climate+Tech,Clean+Tech,Clean+Energy&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API matches any of these industries; this list needs one from each group.

The API industry filter also matches related labels: Cleantech, Sustainability, Energy.

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; 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 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.

1
Base Power

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

Austin, United States51–200Clean Energy, Clean Tech
Series DTotal funding$2.3BAug 2026
2
Zipline

Zipline operates an autonomous delivery service that transports medical supplies, food, and retai...

South San Francisco, United States501–1000Climate Tech, Defense Tech
Series G+Total funding$2.0BMar 2026
3
Sunfire

Sunfire supplies green-hydrogen projects with pressurized alkaline and solid oxide electrolyzers,...

Dresden, Germany501–1000Clean Energy, Hardware
Growth EquityTotal funding$788.5MJul 2025
4
Antares Industries

Antares Nuclear builds factory-produced fission microreactors that supply 100kWe to 1MWe of strat...

Los Angeles, United States51–200Defense Tech, Energy
Series CTotal funding$675.0MJul 2026
5
Radiant

Clean energy startup developing portable nuclear microreactors as zero-emission alternatives to d...

El Segundo, United States51–200Nuclear Energy, Clean Energy
Series DTotal funding$467.4MDec 2025
6
Span

SPAN makes smart electrical panels that provide homeowners appliance-level energy data, controls,...

San Francisco, United States51–200Clean Energy, Hardware
Corporate RoundTotal funding$447.2MMar 2026
7
AMP Robotics

AMP develops AI-powered automation systems that help recycling facilities sort materials, improve...

Denver, United States51–200Artificial Intelligence, Climate Tech
ConvertibleTotal funding$349.2MJun 2026
8
Saildrone

Builds and operates autonomous, wind- and solar-powered unmanned surface vehicles for defense, go...

Alameda, United States201–500Artificial Intelligence, Hardware
Corporate RoundTotal funding$284.0MOct 2025
9
ZeroAvia

Develops hydrogen-electric powertrains and refuelling systems for aircraft, serving operators and...

Everett, United States201–500Clean Tech, Hardware
Venture RoundTotal funding$230.3MDec 2025
10
Phononic Devices

Global leader in solid-state thermoelectric cooling and refrigeration devices for healthcare, foo...

Durham, United States201–500Clean Tech, Hardware
Series G+Total funding$215.5MOct 2022
11
Skeleton Technologies

Skeleton develops high-power energy systems for AI infrastructure, grid stability, mobility, indu...

Tallinn, Estonia201–500Climate Tech, Hardware
Venture RoundTotal funding$198.4MMay 2026
12
Heron Power Electronics

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

Scotts Valley, United States11–50Clean Energy, Climate Tech
Series BTotal funding$178.0MFeb 2026
13
Aerones

Aerones is a robot-enabled wind turbine maintenance and inspection provider offering robotic insp...

Riga, Latvia201–500Climate Tech, Drones
Series BTotal funding$140.2MJun 2025
14
instagrid

Makes portable high-performance battery systems for professionals to replace diesel generators wi...

Ludwigsburg, Germany51–200Clean Energy, Energy Storage
Series CTotal funding$138.4MJan 2024
15
Earth Optics

EarthOptics combines sensors, algorithms, and carbon analytics to provide farmers with high-resol...

Minneapolis, United States51–200Agtech, Data & Analytics
Series CTotal funding$127.6MOct 2025
16
Syzygy Plasmonics

Syzygy Plasmonics converts waste biogas and renewable electricity into affordable low-carbon avia...

Houston, United States11–50Climate Tech, Deep Tech
Series CTotal funding$105.8MNov 2022
17
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
18
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
19
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
20
Pyka

Pyka designs and manufactures autonomous electric aircraft for crop protection, cargo, and defens...

Alameda, United States51–200Aerospace, Climate Tech
Series BTotal funding$91.0MSep 2024
21
Aquion Energy

Developer of saltwater Aqueous Hybrid Ion batteries for grid-scale and off-grid energy storage us...

Pittsburgh, United States51–200Clean Energy, Energy Storage
Series FTotal funding$88.2MApr 2016
22
Redox Blox

Redox Blox, now Tempo, offers thermochemical batteries that charge with low-cost electricity and ...

San Diego, United States11–50Climate Tech, Hardware
Series ATotal funding$75.1MOct 2024
23
Bcomp

Bcomp develops natural fibre reinforcements for sustainable lightweighting in sports, motorsports...

Fribourg, Switzerland51–200Mobility, Advanced Manufacturing
Series CTotal funding$75.0MApr 2024
24
Avalanche Energy

Developer of compact, mobile fusion reactors providing neutron sources and distributed power for ...

Seattle, United States51–200Clean Energy, Defense Tech
Venture RoundTotal funding$69.0MFeb 2026
25
Orbital Industries

Uses an AI platform to design and commercialize advanced materials and climate technologies for i...

London, United Kingdom11–50Advanced Manufacturing, Artificial Intelligence
Series BTotal funding$66.0MMay 2026