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 907 start-ups with an aggregate funding of $23.5b. The average funding per company in this subset is $339.9m.

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

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Arzeda logo

Arzeda

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

5

Funding Rounds

$72.2m

Money raised

Impossible Foods logo

Impossible Foods

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.

11

Funding Rounds

$1.9b

Money raised

Bolt Threads logo

Bolt Threads

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

8

Funding Rounds

$406.4m

Money raised

Pachama logo

Pachama

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

4

Funding Rounds

$74.3m

Money raised

Caban Systems logo

Caban Systems

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

3

Funding Rounds

$2.9m

Money raised

Molecular Assemblies, Inc. logo

Molecular Assemblies, Inc.

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

7

Funding Rounds

$83.0m

Money raised

Upside Foods logo

Upside Foods

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

4

Funding Rounds

$580.8m

Money raised

Apeel Sciences logo

Apeel Sciences

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.

21

Funding Rounds

$1.9b

Money raised

Urban Electric Power logo

Urban Electric Power

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.

1

Funding Rounds

$408.5k

Money raised

Commonwealth Fusion Systems logo

Commonwealth Fusion Systems

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

5

Funding Rounds

$2.1b

Money raised

Modern Meadow logo

Modern Meadow

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.

9

Funding Rounds

$331.1m

Money raised

South Pole (company) logo

South Pole (company)

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.

1

Funding Rounds

LevelTen Energy logo

LevelTen Energy

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

6

Funding Rounds

$99.3m

Money raised

Via Separations logo

Via Separations

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

5

Funding Rounds

$43.9m

Money raised

Genomatica logo

Genomatica

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

10

Funding Rounds

$635.4m

Money raised

BlueNalu logo

BlueNalu

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

5

Funding Rounds

$104.5m

Money raised

Back Market logo

Back Market

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

9

Funding Rounds

$1.3b

Money raised

Reformation logo

Reformation

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

2

Funding Rounds

$37.0m

Money raised

Carbon Analytics logo

Carbon Analytics

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.

3

Funding Rounds

Viridos logo

Viridos

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.

8

Funding Rounds

$175.0m

Money raised

Toast Ale logo

Toast Ale

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.

1

Funding Rounds

$2.5m

Money raised

The EVERY Company logo

The EVERY Company

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.

5

Funding Rounds

$191.8m

Money raised

Membrion, Inc. logo

Membrion, Inc.

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.

10

Funding Rounds

$28.5m

Money raised

Allbirds logo

Allbirds

Allbirds is a startup company manufacturing wool footwear.

8

Funding Rounds

$2.0b

Money raised

Spiber, Inc. logo

Spiber, Inc.

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

13

Funding Rounds

$1.1b

Money raised

First Light Fusion logo

First Light Fusion

First Light Fusion is a clean energy producer founded in 2011 by Nicholas Hawker.

7

Funding Rounds

$185.0m

Money raised

AMSilk logo

AMSilk

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

6

Funding Rounds

$129.3m

Money raised

Air Protein logo

Air Protein

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

1

Funding Rounds

$32.0m

Money raised

Scope 5 logo

Scope 5

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.

4

Funding Rounds

$2.2m

Money raised

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

Pivot Bio logo

Pivot Bio

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.

8

Funding Rounds

$1.1b

Money raised

Vaxess Technologies logo

Vaxess Technologies

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

14

Funding Rounds

$87.2m

Money raised

Accelergy logo

Accelergy

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

4

Funding Rounds

$50.3m

Money raised

Sunfire logo

Sunfire

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

13

Funding Rounds

$779.0m

Money raised

LanzaTech logo

LanzaTech

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

6

Funding Rounds

$265.4m

Money raised

Terrestrial Energy logo

Terrestrial Energy

Terrestrial Energy is developing molten salt nuclear reactors.

5

Funding Rounds

$40.7m

Money raised

Svante logo

Svante

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

6

Funding Rounds

$161.3m

Money raised

Gogoro logo

Gogoro

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

1

Funding Rounds

$300.0m

Money raised

Ynsect logo

Ynsect

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

9

Funding Rounds

$382.3m

Money raised

75F logo

75F

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

5

Funding Rounds

$69.9m

Money raised

NET Power (company) logo

NET Power (company)

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

4

Funding Rounds

$150.0m

Money raised

Natural Fiber Welding logo

Natural Fiber Welding

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.

3

Funding Rounds

$113.0m

Money raised

Einride logo

Einride

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

11

Funding Rounds

$511.8m

Money raised

Urbint logo

Urbint

A data intelligence company aiding urban opeartors in decision making

2

Funding Rounds

$95.0m

Money raised

Stuffstr logo

Stuffstr

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

1

Funding Rounds

$2.9m

Money raised

Tokamak Energy logo

Tokamak Energy

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

7

Funding Rounds

$172.1m

Money raised

Renaissance Fusion logo

Renaissance Fusion

Nuclear fusion start-up in Europe researching high-temperature superconductors to simplify the construction of Stellarator devices as well as other applications in medical imaging.

1

Funding Rounds

$16.0m

Money raised

NEXT Energy Technologies logo

NEXT Energy Technologies

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

10

Funding Rounds

$33.0m

Money raised

Pavegen (company) logo

Pavegen (company)

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

1

Funding Rounds

Enervee logo

Enervee

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.

5

Funding Rounds

$40.4m

Money raised

Nanosolar (company) logo

Nanosolar (company)

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

6

Funding Rounds

$490.0m

Money raised

Zap Energy logo

Zap Energy

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

7

Funding Rounds

$332.8m

Money raised

Beta Hatch logo

Beta Hatch

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

6

Funding Rounds

$41.3m

Money raised

Infarm logo

Infarm

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

9

Funding Rounds

$801.9m

Money raised

Zappos logo

Zappos

Zappos is an online shoe and clothing shop founded in 1999 by Nick Swinmurn.

4

Funding Rounds

$42.5m

Money raised

iUNU logo

iUNU

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

10

Funding Rounds

$121.7m

Money raised

Coreshell Technologies logo

Coreshell Technologies

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

3

Funding Rounds

$27.8m

Money raised

Nori (company) logo

Nori (company)

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

4

Funding Rounds

$12.4m

Money raised

Proterra, Inc. logo

Proterra, Inc.

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

17

Funding Rounds

$1.5b

Money raised

Calysta logo

Calysta

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

$274.2m

Money raised

Kraig Biocraft Laboratories logo

Kraig Biocraft Laboratories

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.

4

Funding Rounds

$14.0m

Money raised

Arcadia logo

Arcadia

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.

5

Funding Rounds

$264.5m

Money raised

Carbicrete logo

Carbicrete

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

1

Funding Rounds

$2.1m

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

Molekule (company) logo

Molekule (company)

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

6

Funding Rounds

$146.5m

Money raised

Joule (company) logo

Joule (company)

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

5

Funding Rounds

$225.0m

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

Metamaterial Technologies logo

Metamaterial Technologies

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

9

Funding Rounds

$28.4m

Money raised

Anellotech logo

Anellotech

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

7

Funding Rounds

$23.5m

Money raised