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CleanTech Startups

Updated August 2026

Companies in the cleantech sector developing innovative solutions and technologies.

Explore 837 recently funded cleantech companies with verified founder contact information and fundraising data.

Total Companies
837
Total Funding
$941.4M
Avg Funding
$37.7M
Global Reach
11
countries

Top Cities for CleanTech

Newark
Lebanon
Louisville
Gif-sur-yvette
Nyon
London

Recently Funded Companies

Export
Newark, United States

Amatec develops sustainable construction materials by transforming industrial gypsum waste into fast-curing, high-strength concrete.

$240K raised
Dec 2024

Founder Contacts

41,000+ verified contacts

Lebanon, United States

FreshAir Sensor develops molecular air quality monitoring systems that help property operators track and manage indoor environments.

$3.7M raised
Dec 2024

Founder Contacts

41,000+ verified contacts

Louisville, United States

AMP utilizes AI-powered sortation to enhance recycling efficiency and reduce costs.

$91.0M raised
Dec 2024

Founder Contacts

41,000+ verified contacts

Gif-sur-yvette, France

Spark Cleantech develops and deploys a patented decarbonization technology for heavy industries.

$35.0M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Nyon, Switzerland

AgroSustain is a one-stop-shop solution for biological plant protection.

Dec 2024

Founder Contacts

41,000+ verified contacts

London, United Kingdom

The world’s most innovative technology company, bringing the revolutionary benefits of green nanotechnology to all parts of life.

$314K raised
Dec 2023

Founder Contacts

41,000+ verified contacts

Kingston, Canada

Cyclic Materials is a cleantech company that develops a circular supply chain for rare earth elements and critical metals.

$75.0M raised
Jan 2026

Founder Contacts

41,000+ verified contacts

Calgary, Canada

Carbonova is a company that develops carbon nanofibres for its extraordinary market applications.

$3.7M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Ithaca, United States

Connecting the equipment you know with the information you need for faster, more effective decisions.

Jan 2024

Founder Contacts

41,000+ verified contacts

Helsinki, Finland

Rens Original is a consumer goods company that manufactures and supplies eco-friendly footwear and clothing products.

$3.4M raised
Dec 2021

Founder Contacts

41,000+ verified contacts

London, United Kingdom

Octopus Energy is a clean energy technology company that provides green energy solutions.

$320.0M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Milano, Italy

Full-Stack Nature Tech Company: certified primary data on biodiversity (ESRS E4) and waste (ESRS E5) for EU CSRD corporates.

$177K raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Rome, Italy

B2B platform for circular textiles

$52K raised
Dec 2024

Founder Contacts

41,000+ verified contacts

Morrisville, United States

374Water (NASDAQ: SCWO) is a US-based cleantech company with an innovative solution to wastewater treatment and waste management issues.

$50.0M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Cedar Park, United States

Creating innovative generator solutions that enable clean, flexible, and affordable electricity production.

$6.0M raised
Dec 2024

Founder Contacts

41,000+ verified contacts

State College, United States

spotLESS Materials is a cleantech platform.

$900K raised
Dec 2021

Founder Contacts

41,000+ verified contacts

Auckland, New Zealand

Vessev is a maritime trasportantion company that offers hydrofoiling electric vessels for travelling through water.

$3.3M raised
Jan 2025

Founder Contacts

41,000+ verified contacts

Aachen, Germany

Cylib specializes in holistic battery recycling, transforming end-of-life batteries into sustainable raw materials for energy transition.

$74.6M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Hollister, United States

ZeroAvia develops hydrogen-electric powertrains for zero-emission aviation solutions.

Dec 2025

Founder Contacts

41,000+ verified contacts

New York, United States

Clarity AI is a sustainability technology platform that uses machine learning to deliver environmental and social insights to investors.

$50.0M raised
Dec 2021

Founder Contacts

41,000+ verified contacts

Barcelona, Spain

Submer enables next-generation cooling and automation for data and energy-

$20.9M raised
Dec 2024

Founder Contacts

41,000+ verified contacts

Calgary, Canada

Entropy focuses on commercializing energy‐transition technologies.

$149.7M raised
Dec 2023

Founder Contacts

41,000+ verified contacts

Helsinki, Finland

BroadBit Batteries is developing revolutionary new batteries using novel sodium-based chemistries to power the future green economy.

$2.8M raised
Dec 2021

Founder Contacts

41,000+ verified contacts

Stockholm, Sweden

Done is the operating system for green energy installations - EV Chargers, Battery storage and Heat pumps.

$674K raised
Dec 2022

Founder Contacts

41,000+ verified contacts

Stockholm, Sweden

small modular reactors, clean energy, deep tech

$50.0M raised
Dec 2025

Founder Contacts

41,000+ verified contacts

Showing 651 to 675 of 837 companies

About the CleanTech Startup Ecosystem

The cleantech sector is an active area of startup innovation and venture capital investment. Companies in this space are developing new technologies, platforms, and services that address evolving market needs and create new business opportunities.

Funding Trends in CleanTech

CleanTech companies raise capital across various funding stages, from early seed rounds to late-stage growth financing. Investor interest in this sector is driven by the size of the addressable market, the pace of technology adoption, and the potential for scalable business models.

Growth Outlook

The cleantech sector is expected to continue evolving as technology advances, market dynamics shift, and new opportunities emerge. Companies that demonstrate strong product-market fit, efficient growth, and clear competitive advantages are well-positioned to attract continued investment.

CleanTech Funding Breakdown

Here is how funding is distributed among the 837 cleantech companies tracked in the VCBacked database.

Average Funding
$37.7M
Total Funding Tracked
$941.4M
Countries Represented
11

Distribution by Funding Stage

Other25 companies

Top Cities for CleanTech

1.London
2 companies$320.3M
2.Calgary
2 companies$153.4M
3.Helsinki
2 companies$6.2M
4.Stockholm
2 companies$50.7M
5.Newark
1 companies$240K

Related Industries

Companies in the cleantech sector often overlap with or complement businesses in adjacent industries. Exploring related verticals can help you discover additional companies, identify partnership opportunities, and understand the broader competitive landscape.

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