All Industries

Top Clean Tech Companies

607 Clean Tech companies, sorted by total funding raised.

607

Companies

$32.0B

Combined Funding

8

Funded (Last 60d)

Seed

Top Stage

Indexed tracks 607 Clean Tech companies that have collectively raised $32.0B in documented funding. The most-funded clean tech companies tracked include Stegra and Vioneo. 8 companies closed a new round in the last 60 days, with Seed being the most common funding stage.

Stegra

Green steel company using hydrogen and renewable electricity to decarbonize steel production. For...

Stockholm, Sweden201–500Clean Tech, Green Steel
Venture Round·$11.9B·Jun 2026
Vioneo

Scale-up established in 2024

Antwerp, Belgium11–50Chemicals, Clean Tech
Corporate Round·$1.7B·Sep 2024
Twelve

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
A
AtievaClosed

EV battery and powertrain startup founded in 2007 that developed electric vehicle technology befo...

Newark, United States5001–10000Automotive, Electric Vehicles
Venture Round·$1.3B·Jan 2019
Base Power

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

Austin, United States51–200Clean Energy, Clean Tech
Series C·$1.3B·Oct 2025
Ascend Elements

Produces sustainable, engineered lithium‑ion battery materials from recycled batteries for EV and...

Westborough, United States51–200Advanced Manufacturing, Clean Tech
Growth Equity·$1.0B·Feb 2024
BirdClosed

Bird is an electric vehicle maker and bike-sharing network focused on sustainability.

Santa Monica, United States201–500Mobility, Video
Venture Round·$969.0M·Jan 2026
Climeworks

Builds and operates Direct Air Capture systems and sells carbon removal services to enterprise cu...

Zurich, Switzerland201–500Climate Tech, Carbon Capture
Venture Round·$925.0M·Jul 2025
Enpal

Germany's leading integrated renewable energy company offering solar panel subscriptions, battery...

Berlin, Germany1001–5000Clean Tech, Renewable Energy
Venture Round·$769.0M·Apr 2025
Boston Metal

Develops Molten Oxide Electrolysis to produce low-carbon steel and recover valuable metals from m...

Boston, United States201–500Climate Tech, Manufacturing
Convertible·$505.0M·Jul 2025
ChargePointIPO

Global market leader in electric vehicle charging hardware, software, and services

Campbell, United States1001–5000Automotive, Clean Tech
Extension Round·$449.0M·Aug 2020
FLO

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

Montreal, Canada201–500Electric Vehicles, Energy
Series D·$400.0M·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
Capstone Turbine CorporationIPO

Manufacturer of low-emission microturbine energy systems for commercial and industrial applications.

Van Nuys, United States201–500Clean Tech, Energy
Corporate Round·$372.5M·Mar 2026
6K

Plasma reactor manufacturer for sustainable advanced materials and batteries.

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

Turnkey portfolio wide energy efficiency retrofits for the Fortune 500

Denver, United States201–500Clean Tech, Energy
Corporate Round·$356.5M·Dec 2022
Atlas Agro

Develops renewable fertilisers

Zug, Switzerland11–50Agtech, Clean Tech
Growth Equity·$325.0M·Oct 2023
Andion Global

Waste-to-renewable energy platform developing biogas and biomethane facilities from organic waste.

Vancouver, Canada11–50Clean Tech, Renewable Energy
Series B·$270.0M·Feb 2022
Vemo

Mexican cleantech company integrating the clean mobility ecosystem with EV charging and fleet ser...

Mexico City, Mexico1001–5000Clean Tech, Electric Vehicles
Growth Equity·$250.0M·Sep 2024
UBQ

Global manufacturer converting mixed household waste including organics into a bio-based thermopl...

Tel Aviv, Israel51–200Clean Tech, Manufacturing
Series E·$243.5M·Sep 2023
ZeroAvia

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

Everett, United States201–500Clean Tech, Hardware
Venture Round·$230.3M·Dec 2025
Gradiant Corporation

Water treatment technology company offering advanced solutions for industrial and municipal water...

United States201–500Clean Tech, Environmental Services
Series E·$225.0M·May 2026
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
Phononic Devices

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

Durham, United States201–500Clean Tech, Hardware
Series G+·$205.5M·Oct 2022
Carbon Clean

Carbon Clean is a UK-based industrial carbon capture technology company providing scalable point-...

London, United Kingdom51–200Carbon Capture, Clean Tech
Series C·$201.2M·May 2022

Frequently Asked Questions

How many Clean Tech companies are tracked on Indexed?

Indexed tracks 607 Clean Tech companies, sorted by total funding raised.

How much funding have Clean Tech companies raised in total?

The Clean Tech companies tracked by Indexed have collectively raised $32.0B in documented funding.

What are the top-funded Clean Tech companies?

The most-funded Clean Tech companies tracked include Stegra, Vioneo, Twelve.

Who are the top investors in Clean Tech?

Leading investors active in Clean Tech include Techstars, Partech, DCVC (Data Collab).

Explore More

Other Industries