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YC Climate companies

53 Y Combinator companies in Climate, with team size, growth, open roles and funding.

Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.

Hiring the mostlast 60 days
5 roles
Impossible MetalsW22
  1. 2Aerones3
  2. 3Carbonfact3
See all 8
Fastest growingteam, 6 months
+140%
PlumeS24
  1. 2Rimba+57%
  2. 3HyLight+37%
See all 11
Shrinkingteam, 12 months
−51%
MinimumS20
  1. 2Paces−26%
  2. 3Raptor Maps−14%
See all 8
Raised the mostlast 12 months
$14.6M
HyLightS23
  1. 2Living Carbon$13M
  2. 3Plume$3.9M
See all 5
Companies
53
Active
43
Hiring, last 60 days
8
Open roles, 60 days
17
People on these teams
2,031
Showing 50 of 53 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Robotics for wind turbine maintenance.
W18442−2%−5%3$116MSeries B$62.3M, Jun 2025
Modern bill payment platform for African businesses and consumers.
W17134 +1%0$120KUndisclosed round$120K, Nov 2022
Raptor Maps builds software to manage the solar PV lifecycle.
S1696−14%−14%1$62.2MSeries C$35M, Dec 2024
Modular carbon capture
W2179+13%+23%0$5.5MSeries A$5.5M, Feb 2024
Agentic AI for Power Projects and AI Infrastructure
S2269−1%−26%YC$13.8MSeries A$11M, Jul 2024
Decarbonizing the fashion industry
S2145+5%+10%3$17.1MSeries A$15M, Apr 2024
Carbon markets platform and solutions
S2144−6%+2%0$16.6MSeries A$13.5M, Apr 2023
Predictive Explorer and Driller for Critical Metal Deposits
S1944+13%+33%0$34MSeries B$20M, Jan 2025
maximizing biomass on low quality land
W2039+5%+15%YC$49MUndisclosed round$13M, Apr 2026
Turning food waste into Biochar to remove CO2 from the atmsophere
S1739−5%−9%0$9.5MNon-equity support$250K, Apr 2025
Software to find the best sites for renewables on the electrical grid
W2238+23%+27%YC$500KSeed$500K, May 2025
Unmanned airships for inspecting our critical assets
S2337+37%+42%1$19MSeries A$14.6M, Oct 2026
Unlocking carbon markets for European forest owners
W22Acquired36−12%−23%0$3MSeed$2.5M, Jul 2022
Restoring nature to solve climate change.
W19Acquired35 −45%0$88.3MSeries B$9M, Dec 2023
We help companies automate the accounting of their carbon emissions
S2031−11%−6%2
Carbon capture equipment for ships
W2225−4%−7%0$7MGrant$1.5M, Aug 2025
Underwater robotic vehicles that collect battery metals responsibly
W2224−4%+9%5$10.7MUndisclosed round$93K, Apr 2026
AI that tells mining companies where to mine to maximize profits
W2024+9%+20%0SeedAug 2020
Decarbonized heat and power cheaper than fossil fuels
S1721 −5%0$5.3MUndisclosed round$3.2M, Mar 2024
Building systems to remove carbon dioxide from air at industrial scale
W2219−5%+6%YC$6.9MSeed$6.9M, Mar 2024
Enabling li-ion batteries to charge ultra fast without compromising…
W1419+6%+19%0$3.9MGrant$3M, Jan 2026
Helping corporates achieve Net Zero through tech solutions.
S2018−28%−51%YC$15.7MSeed$13M, Jul 2022
We make carbon negative roads
W2217−6%−11%0$104KUndisclosed round$104K, Mar 2026
Reliable and affordable solar energy in developing countries.
S1517+6%+6%0$120KYC investment$120K, Aug 2015
AI powered sensors that save energy, water and emissions
W20Acquired14−7%−7%0$8MSeed$4M, May 2023
Renewable infrastructure deployment at scale.
S2412+140% 0$4.4MSeed$3.9M, Apr 2026
Biodegradable and carbon neutral textiles, engineered from food waste.
S2212−8%+9%0$2MGrant$216K, Jun 2023
Streamlining Data Capture to Report Creation for Heavy Industries
X2511+57%+83%0$500KYC investment$500K, Jun 2025
Building a nervous system for the atmosphere
S2411 +22%1$4.4MSeed$3.9M, Jun 2025
Foundation models to simulate Earth, starting with weather.
S2411−15%−15%YC$500KYC investment$500K, Sep 2024
Turning power into AI compute at speed with modular data centers at…
W2290%−10%1$4.3MSeed$3.8M, Jun 2022
Tasty and scalable cultivated meat at price parity
W21Acquired8−11%−27%0$5.1MUndisclosed round$5M, Mar 2024
We turn waste gases into supply-secure chemicals
S267+17%+17%0
Electric cargo ships
S226+20%+20%YC$500KYC investment$500K, Aug 2022
Unlocking Virtual Power Plants for rental properties
W22Acquired60%0%0$500KYC investment$500K, Jun 2022
We recycle plastic using engineered enzymes
S225 −37%0$2.2MGrant$1.6M, Feb 2023
We stop cows from burping methane.
W2250%0%0$4MSeed$4M, Apr 2023
Affordable and verified direct air carbon capture and storage
S21Inactive5−17%−58%0$10.9MGrant$40K, Jun 2024
We make carbon negative chemicals from CO2 using fermentation
W224 −50%0SeedApr 2025
Making electric vehicle batteries affordable
S214−43%−64%YC$125KYC investment$125K, Aug 2021
Drones that clear clouds over solar farms and weaken hurricanes
S263  0
We turn CO2 into battery-grade graphite and oxygen.
W193 −40%0$6.2MUndisclosed round$6.2M, Aug 2024
OctaPulse builds computer vision and robotics for fish farms and…
W262  YC$500KYC investment$500K, Mar 2026
We build floating solar data centers
S242  0$500KYC investment$500K, Sep 2024
We enable landlords to generate income from solar panels.
S222  0$500KYC investment$500K, Mar 2023
Advano is a battery technology company that improve the longevity of…
S172  0$46.3MSeries A$3.3M, May 2024
Wren is a monthly subscription to offset your carbon footprint.
S19297  0$8.2MSeed$6.6M, Feb 2022
Radically reducing capital costs and build time for direct air capture
W21Inactive198  0$22MSeries A$22M, Apr 2023
Growing seaweed to stabilize the climate.
S21  
Cutting edge hydrofoil systems for boatbuilders
W19  

How this works

1. The roster

Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.

2. The numbers

Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.

3. The lists

Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.

Built with Crustdata. Get your own API key and build your own.

The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.

  • Company search for team size, growth and funding
  • Job search with a count by company, for who is hiring and for what
  • A watch that re-runs the search weekly and sends only what changed
# 1. every company with Y Combinator as an investor
curl https://api.crustdata.com/company/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
    "filters": { "field": "funding.investors",
                 "type": "in", "value": ["Y Combinator"] },
    "fields": ["basic_info.name",
      "headcount.total", "headcount.growth_percent",
      "funding.total_investment_usd"],
    "limit": 100
  }'

# 2. open listings per company, last 60 days (limit 0 = counts only)
curl https://api.crustdata.com/job/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
  "filters": { "op": "and", "conditions": [
    { "field": "company.basic_info.company_id",
      "type": "in", "value": [...] },
    { "field": "metadata.date_added",
      "type": "=>", "value": "2026-08-24" } ]},
  "limit": 0,
  "aggregations": [{ "type": "group_by",
    "field": "company.basic_info.company_id", "agg": "count" }]
}'

# 3. the same company filter as a weekly watch: POST /watch/company/search

Questions about YC Climate companies

How many YC Climate companies are there?

53 Y Combinator companies are in Climate; 43 are active.

Which YC Climate companies are hiring?

8 companies posted roles in the last 60 days, led by Impossible Metals (5 roles), Aerones (3 roles) and Carbonfact (3 roles). 12 mark themselves as hiring on YC's directory.

Which YC Climate companies are growing fastest?

By team growth over 6 months (10+ people): Plume (+140%), Rimba (+57%) and HyLight (+37%).

Which YC Climate companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: HyLight ($14.6M), Living Carbon ($13M) and Plume ($3.9M).

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