69 Best Sustainability Startups to Watch in 2025

The Definitive Seedtable Ranking of Sustainability 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 895 start-ups with an aggregate funding of $23.3b. The average funding per company in this subset is $337.5m.

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

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5

Funding Rounds

$72.2m

Money raised

Arzeda is a biotechnology and software company designing custom microorganisms for industrial applications through computational enzyme design, protein optimization, and metabolic engineering.

Key people:

11

Funding Rounds

$1.9b

Money raised

Impossible Foods is a plant-based meat company making meat and dairy products that are made to look and feel like animal products by manufacturing heme, the oxygen binding molecule found in blood, using engineered yeast grown in bioreactors.

8

Funding Rounds

$406.4m

Money raised

Bolt Threads is a biotechnology company that makes high performance fabrics and materials using biology.

4

Funding Rounds

$74.3m

Money raised

Pachama is a company estimating carbon storage in forests and predicting future deforestation or potential for forest restoration with the use of satellite images.

3

Funding Rounds

$2.9m

Money raised

Caban Systems is a Burlingame, California-based renewable energy and energy storage company developing modular energy storage platforms for critical infrastructure power needs.

Key people:

7

Funding Rounds

$83.0m

Money raised

Molecular Assemblies, Inc. is an enzymatic DNA synthesis technology founded in 2013 by Curt Becker, Bill Efcavitch and William Efcavitch.

4

Funding Rounds

$580.8m

Money raised

Upside Foods is a San Francisco-based company making cultured meat products. The company was founded by Uma Valeti, Nicholas Genovese, and Will Clem.

21

Funding Rounds

$1.9b

Money raised

Apeel Sciences is a company that develops treatments to prevent spoilage of fruits and vegetables using molecules naturally found in peels, which maintain moisture and keep out oxygen.

1

Funding Rounds

$408.5k

Money raised

Urban Electric Power is a Pearl River, New York-based developer of a zinc manganese dioxide battery technology. The company was spun out of the CUNY Energy Institute in 2013.

Key people:

5

Funding Rounds

$2.1b

Money raised

Commonwealth Fusion Systems is a Cambridge, Massachusetts-based research and development company developing fusion power systems based on ARC tokamak reactors.

9

Funding Rounds

$331.1m

Money raised

Modern Meadow is a biotechnology company using cellular agriculture and biofabrication to manufacture bioleather, "Zoa", out of cultured animal free collagen mixed with natural and man made materials.

1

Funding Rounds

South Pole is a Zurich-based climate solutions company offering sustainable project development services in order to provide carbon offset credits to businesses and organizations.

6

Funding Rounds

$99.3m

Money raised

LevelTen Energy provides a clean energy procurement platform for midsize businesses and enterprises.

Location:

Key people:

5

Funding Rounds

$43.9m

Money raised

Via Separations is a Watertown, Massachusetts-based company founded in 2016 by Shreya Dave.

Key people:

10

Funding Rounds

$635.4m

Money raised

Genomatica is a San Diego-based company founded in 2000 by Christophe Schilling.

Location:

Key people:

5

Funding Rounds

$104.5m

Money raised

A cellular agriculture company making fresh and frozen cultured seafood products.

Key people:

1

Funding Rounds

$13.0m

Money raised

Blue Origin is an American, privately-funded, aerospace developer and manufacturer that is interested in lowering the cost of spaceflight in order to explore the solar system

Location:

Key people:

9

Funding Rounds

$1.3b

Money raised

Back Market is an online refurbished goods marketplace connecting consumers with sellers of electronic devices.

Location:

Key people:

2

Funding Rounds

$37.0m

Money raised

Reformation is a women's fashion company aimed at designing sustainable clothing and accessories.

Key people:

3

Funding Rounds

Carbon Analytics provides a SaaS platform solution designed to assess carbon emissions in companies' supply chains and generate actionable data that can be used to reduce emissions.

8

Funding Rounds

$175.0m

Money raised

Viridos is applying synthetic biology to microalgae for the production of products that address climate change and sustainability. Viridos is focused on producing algal biofuels and other sustainable resources from algae.

1

Funding Rounds

$2.5m

Money raised

Toast Ale is a London-based brewery using surplus fresh bread to brew beer and dedicating their profits to charities working to create greater efficiency in the food supply system.

5

Funding Rounds

$191.8m

Money raised

The EVERY Company (formally Clara Foods) is a biotechnology company founded by two New Harvest community members David Anchel and Arturo Elizondo in 2014. The company is based out of San Francisco, California and manufactures animal- free proteins using using yeast bio-fermentation techniques fore use in food products.

10

Funding Rounds

$28.5m

Money raised

Membrion is a Seattle-based clean technology company and developer of flexible ceramic ion exchange membranes capable of being used in wastewater cleaning and in energy storage solutions.

Location:

Key people:

8

Funding Rounds

$2.0b

Money raised

Allbirds is a startup company manufacturing wool footwear.

13

Funding Rounds

$1.1b

Money raised

Spiber, Inc is a private biomaterials company using industrial biotechnology to develop silk.

6

Funding Rounds

$129.3m

Money raised

AMSilk is a Munich-based synthetic biology company that produces fibers made from the same protein as spider silk.

Industries:

Location:

Key people:

1

Funding Rounds

$32.0m

Money raised

Air Protein is a Berkeley-based biotechnology company producing protein with microorganisms that are fed carbon dioxide in a mission to replace animal agriculture.

4

Funding Rounds

$2.2m

Money raised

Scope 5 is a Seattle-based software company offering sustainability reporting and collating services to help companies achieve greater sustainability in their operations and offer companies reporting on sustainability and related efforts where necessary.

Location:

Key people:

10

Funding Rounds

$876.0m

Money raised

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.

Location:

Key people:

8

Funding Rounds

$1.1b

Money raised

Pivot Bio is a company that creates technology that is focused on nitrogen fixation in cereal crops through microbes.It was founded in 2010 and is located in Berkeley, California.

14

Funding Rounds

$87.2m

Money raised

A medical company in Massachusetts focusing on lowering the cost of vaccine distribution.

Location:

Key people:

13

Funding Rounds

$779.0m

Money raised

Developer and manufacturer of systems for renewable industrial gas and fuel production.

Location:

Key people:

4

Funding Rounds

$50.3m

Money raised

Accelergy is a developer of low carbon, synthetic distillate liquids and transportation fuels at a lower cost to the environment and the consumer.

Location:

6

Funding Rounds

$265.4m

Money raised

A New Zealand industrial biotechnology company developing a gas fermentation platform for converting concentrated industrial emissions into valuable chemicals.

5

Funding Rounds

$40.7m

Money raised

Terrestrial Energy is developing molten salt nuclear reactors.

Location:

Key people:

6

Funding Rounds

$161.3m

Money raised

Svante is a Burnaby-based manufacturer of carbon capture technology to collect CO2 at its sources.

Key people:

1

Funding Rounds

$300.0m

Money raised

Taiwanese-based venture-backed company that develops and sells electric scooters and battery swapping infrastructure

Location:

Key people:

5

Funding Rounds

$69.9m

Money raised

75F is a Bloomington, Minnesota-based technology company offering an Internet of Things (IoT) building automation system for HVAC, lighting, and equipment control.

9

Funding Rounds

$382.3m

Money raised

Ynsect is a company that develops ingredients for aquaculture, pet food and fertilizer using insect protein.

4

Funding Rounds

$150.0m

Money raised

Net Power is a Durham, North Carolina-based natural gas electricity producer using carbon capture and storage to maintain zero emissions production.

2

Funding Rounds

$49.2m

Money raised

Renaissance Fusion is a nuclear fusion reactor manufacturer founded in 2020 by Francesco A Volpe.

Location:

Key people:

3

Funding Rounds

$113.0m

Money raised

Natural Fiber Welding is a Peoria, Illinois-based company developing a scalable fabrication platform that can offset the global dependence on petroleum-based, human-made materials.

Location:

Key people:

11

Funding Rounds

$511.8m

Money raised

A company designing and building autonomous electric transportation (AET) systems for freight and cargo.

Location:

Key people:

2

Funding Rounds

$95.0m

Money raised

A data intelligence company aiding urban opeartors in decision making

1

Funding Rounds

$2.9m

Money raised

Stuffstr is a London-based recommerce technology company, founded by John Atcheson in 2014.

Key people:

7

Funding Rounds

$172.1m

Money raised

Tokamak Energy is a fusion energy producer founded in 2009 by Alan Sykes, David Kingham and Mikhail Gryaznevich.

Key people:

10

Funding Rounds

$33.0m

Money raised

NEXT Energy Technologies is a Santa Barbara, California-based developer of photovoltaic coatings for window.

Key people:

1

Funding Rounds

Pavegen is a London-based company founded by Laurence Kemball-Cook.

5

Funding Rounds

$40.4m

Money raised

Enervee is a company founded in 2010 by Hjalmar Branting, Iker Casillas, Aoife Ní Fhearraigh, Yhonastan Fabian, The Sxplay, Ujiie Naotomo, Robbie Grossman, Ingrid Gfölner, Moisey Uretsky, Don Epperson, Matt Service FBCS and Bhavesh M. Mehta.

6

Funding Rounds

$490.0m

Money raised

An nanotechnology company with focus on developing solar products. It was founded in 2002 and closed in 2013.

7

Funding Rounds

$332.8m

Money raised

Zap Energy is developing compact fusion power that doesn't require magnets or lasers.

6

Funding Rounds

$41.3m

Money raised

Beta Hatch is an insect protein for farming company founded in 2015 by Virginia Emery.

Key people:

9

Funding Rounds

$801.9m

Money raised

Infarm is a developer of vertical farms designed for indoor growing.

10

Funding Rounds

$121.7m

Money raised

iUNU is a Seattle-based agricultural tech startup founded in 2013.

Location:

Key people:

3

Funding Rounds

$27.8m

Money raised

Coreshell Technologies is engineering liquid-deposited nanolayer coatings for Lithium Ion Batteries.

4

Funding Rounds

$12.4m

Money raised

Nori is a company that hosts an open-source, blockchain-based market for purchasing carbon offsets.

Location:

Key people:

17

Funding Rounds

$1.5b

Money raised

Proterra is an American automotive and energy storage company based in Burlingame, California.

Key people:

10

Funding Rounds

$274.2m

Money raised

Calysta is a biotechnology company seeking to improve worldwide food security through making animal feed. The company is based out of Menlo Park, California and was founded in 2012 by Josh Silverman.

10

Funding Rounds

$14.4m

Money raised

Carbon capture and storage company founded in 2007 and based in Dartmouth, Nova Scotia, Canada. CarbonCure Technologies Inc. provides carbon dioxide sequestering technology to concrete plants in a system for recycling carbon dioxide waste from industrial emitters and incorporating it into concrete products.

4

Funding Rounds

$14.0m

Money raised

A biotechnology company developing and commercializing spider silk for textiles and performance polymers. Kraig Biocraft Laboratories uses genetic engineering to produce recombinant spider silk based fibers on an industrial scale.

Industries:

Key people:

5

Funding Rounds

$264.5m

Money raised

Arcadia, previously Arcadia Power, is a Washington, D.C. based tech company which aims to enable a zero-carbon economy. Arcadia is also the developer of a clean energy tech platform designed to facilitate access to clean energy.

Key people:

1

Funding Rounds

$2.1m

Money raised

Carbicrete is a Montreal-based manufacturer of low-cost building materials from industrial carbon dioxide emissions.

Key people:

7

Funding Rounds

$151.6m

Money raised

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.

6

Funding Rounds

$146.5m

Money raised

A technology company making a air purifier using nanotechnology to destroy pollutants.

Key people:

5

Funding Rounds

$225.0m

Money raised

A biotechnology company that specialized in the renewable energy sector. It was located in Bedford, Massachusetts and is no longer in operation.

Key people:

9

Funding Rounds

$119.5m

Money raised

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

$28.4m

Money raised

Metamaterial Technologies is a company using smart materials and photonics to create advanced materials for the aerospace industry.

7

Funding Rounds

$23.5m

Money raised

Anellotech is a Pearl River, New York-based biorefinery company founded in 2008 by David Sudolsky.

Key people:

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