24 Best Carbon Removal Startups to Watch in 2025

The Definitive Seedtable Ranking of Carbon Removal Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 24 start-ups with an aggregate funding of $1.9b. The average funding per company in this subset is $79.1m.

Last update to the database: Feb 18, 2025. See changelog.

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Climeworks logo

Climeworks

Climeworks is a clean technology company that has developed technology for carbon dioxide (CO2) capture from ambient air. It was founded in 2009 and is located in Zurich, Switzerland.

10

Funding Rounds

$876.0m

Money raised

Noya logo

Noya

Capturing CO2 from the sky and re-selling it for 2x cheaper

3

Funding Rounds

$12.2m

Money raised

Newlight Technologies logo

Newlight Technologies

A carbon sequestration technology and bioplastics company based in Huntington Beach, California, founded in 2003, that uses their technology to capture carbon from greenhouse emissions for production of bioplastics.

7

Funding Rounds

$151.6m

Money raised

Carbon Engineering logo

Carbon Engineering

Carbon Engineering is building technologies to capture CO2 directly from the atmosphere, and to use that CO2 in the synthesis of clean transportation fuels that displace crude oil.

9

Funding Rounds

$119.5m

Money raised

Solidia Technologies logo

Solidia Technologies

Solidia Technologies is a Piscataway, New Jersey-based technology company offering solutions for using CO2 for manufacturing construction and industrial products.

4

Funding Rounds

$105.0m

Money raised

Carbon Upcycling Technologies Inc. logo

Carbon Upcycling Technologies Inc.

Carbon Upcycling Technologies Inc. is a Calgary-based carbon capture and storage company developing technologies to turn the carbon into building materials.

3

Funding Rounds

$6.0m

Money raised

Charm Industrial logo

Charm Industrial

Charm Industrial is a company that works to produce reliable, cost-competitive hydrogen from biomass.

3

Funding Rounds

$103.5m

Money raised

Heirloom logo

Heirloom

Heirloom is a San Francisco-based environmental remediation company founded by Shashank Samala.

3

Funding Rounds

$53.0m

Money raised

Seabound logo

Seabound

Carbon capture technology that reduces industrial CO2 emissions.

3

Funding Rounds

$9.3m

Money raised

CERT logo

CERT

CERT is a Toronto-based carbon capture and storage company converting CO2 into chemical feedstocks and carbon-based fuels.

1

Funding Rounds

$1.4m

Money raised

Brilliant Planet logo

Brilliant Planet

Brilliant Planet is a nature-based system capturing and storing carbon founded in 2013 by Raffael Jovine Ph.D.

2

Funding Rounds

$24.0m

Money raised

ecoLocked logo

ecoLocked

ecoLocked is a green concrete manufacturer founded in 2021.

2

Funding Rounds

$6.2m

Money raised

Terradot logo

Terradot

Climate technology focused on carbon removal by accelerated erosion of silicate rock.

1

Funding Rounds

$54.0m

Money raised

Agreena logo

Agreena

Agreena is a soil carbon program for farmers founded in 2018.

3

Funding Rounds

$77.7m

Money raised

44.01 logo

44.01

44.01 is a mineralisation technology developer founded in 2020 by Talal Hasan.

2

Funding Rounds

$42.0m

Money raised

Mission Zero logo

Mission Zero

Direct Air Capture (DAC) technology to remove carbon dioxide.

2

Funding Rounds

$10.0m

Money raised

Isometric logo

Isometric

Isometric is a carbon removal standard and registry.

1

Funding Rounds

$25.0m

Money raised

Carbon Clean logo

Carbon Clean

Carbon capture and storage.

3

Funding Rounds

$166.0m

Money raised

Supercritical logo

Supercritical

Supercritical is a carbon removal marketplace

3

Funding Rounds

$28.8m

Money raised

C2CNT logo

C2CNT

C2CNT is a Virginia-based developer of carbon capture and storage technology which uses the captured material to create carbon nanotubes.

1

Funding Rounds

$3.5m

Money raised

SeaO2 logo

SeaO2

SeaO2 is a carbon (CO2) removal technology developer founded in 2021 by Ruben Brands.

1

Funding Rounds

$2.2m

Money raised

Patch logo

Patch

Patch helps clients make their businesses carbon neutral .

1

Funding Rounds

$4.5m

Money raised

CUR8 logo

CUR8

CUR8 is a market-making platform for carbon removal.

1

Funding Rounds

$6.5m

Money raised

Sustaera, Inc. logo

Sustaera, Inc.

Sustaera, Inc. is a Cary, North Carolina-based company founded in 2021.

1

Funding Rounds

$10.0m

Money raised