Sector portfolio · Accelerator · United States

Y Combinator's Cleantech portfolio

Y Combinator has backed 27 Cleantech startups in rounds we track, $570M between them, shown by the stage each has reached. The best-funded is Rainmaker.

27startups backed
5stages
$570Mraised between them
Pre-seed and seedbiggest stage

Y Combinator's whole portfolioY Combinator's profile

Pre-seed and seed

11

Stage not reported

8

Series B

3

Series A

3

Growth

2

Segment by segment

Pre-seed and seed

11 startups · $58M raised

  1. InvertInvert is a software startup that specializes in Bioprocess AI SaaS, focusing on enhancing biomanufacturing and bio-industrial operations.Canada$40M
  2. AirMyneAirMyne is a Direct Air Capture (DAC) company based in Berkeley, California, founded in 2022.United States$6.9M
  3. ReliOnRelion is an online platform for shift scheduling and time registration solutions.Canada$3.0M
  4. Valor Water AnalyticsValor Water Analytics has developed customized financial data and dashboard tools for water utilities and businesses.United States$2.7M
  5. FTEXFTEX is a Montreal-based company founded in 2017 that specializes in advanced electric vehicle (EV) powertrain solutions, focusingCanada$1.4M
  6. GreenLIB MaterialsGreenLIB Materials is a long-term recovery process for key materials from all forms of lithium-ion batteries.Canada$1.1M
  7. JupeJUPE is a hospitality and modular housing technology company that specializes in designing flat-packed, off-grid shelter units.United States$1.1M
  8. Island Water TechnologiesIWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications.Canada$500K

Stage not reported

8 startups · $140M raised

  1. TwelveTwelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship.United States$117M
  2. Moxion PowerMoxion Power develops zero-emission generators and off-road equipment to support industries.United States$11M
  3. IteroItero is a technology company based in London, United Kingdom, specializing in chemical recycling.United Kingdom$6.1M
  4. HeyChargeHeyCharge provides charging infrastructure, payment systems, and installation for electric vehicles.Germany$3.0M
  5. MoltexFLEXMoltexFLEX is developing the advanced small modular FLEX reactor and GridReserve energy storage system.United Kingdom$1.7M
  6. SeaboundSeabound is a carbon capture technology company.United Kingdom$1.5M
  7. ALT TEXALT TEX is a biotech company that offerscarbon neutral fabric generated from post-industrial waste.Canada$216K
  8. HeimdalHeimdal is a climate technology company that specializes in direct air capture (DAC) technology to remove CO2 from the atmosphere.United Kingdom$40K

Series B

3 startups · $180M raised

  1. RainmakerRainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet.United States$126M
  2. PolystyvertPolystyvert est une entreprise montréalaise du secteur des technologies propres qui révolutionne le monde du recyclage des plastiqCanada$29M
  3. SPARK MicrosystemsSPARK Microsystems is a Canadian fabless semiconductor company based in Montreal, Quebec.Canada$25M

Series A

3 startups · $62M raised

  1. NoyaNoya, also known as Noya Labs, is a climate technology company founded in 2020 and headquartered in San Francisco, California.United States$22M
  2. ClarasightClarasight is a New York-based technology company founded in 2021 by Adam Braun and Philip Charm.United States$21M
  3. RiffRiff provides plans to musicians and connects them with industry access to a platform.United States$19M

Growth

2 startups · $129M raised

  1. ConvergeConstruction Technology.United Kingdom$69M
  2. ZeitviewZeitview, formerly known as DroneBase, is a leader in advanced inspection software and aerial data analytics, focusing on renewablUnited States$60M

How this map is made. Every startup here works in Cleantech and has raised money in a round we track that names Y Combinator as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026.

More portfolio maps

All portfolios
Sector portfolioY Combinator's AI portfolio1,143 startups · $44BSector portfolioY Combinator's Fintech portfolio338 startups · $24BSector portfolioY Combinator's Big Data & Analytics portfolio201 startups · $3.4BSector portfolioY Combinator's Healthtech portfolio150 startups · $4.2BSector portfolioY Combinator's IT Services portfolio148 startups · $840MSector portfolioY Combinator's Web3 & Crypto portfolio139 startups · $7.4B

Raising from investors like Y Combinator?

Find the investors who back startups like yours, with their cheques, rounds and partners, in the app with filters, lists and exports.

Find investorsMarket maps