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.
| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Robotics for wind turbine maintenance. | W18 | 442 | −2% | −5% | 3 | $116M | Series B$62.3M, Jun 2025 |
Modern bill payment platform for African businesses and consumers. | W17 | 134 | +1% | 0 | $120K | Undisclosed round$120K, Nov 2022 | |
Raptor Maps builds software to manage the solar PV lifecycle. | S16 | 96 | −14% | −14% | 1 | $62.2M | Series C$35M, Dec 2024 |
Modular carbon capture | W21 | 79 | +13% | +23% | 0 | $5.5M | Series A$5.5M, Feb 2024 |
Agentic AI for Power Projects and AI Infrastructure | S22 | 69 | −1% | −26% | YC | $13.8M | Series A$11M, Jul 2024 |
Decarbonizing the fashion industry | S21 | 45 | +5% | +10% | 3 | $17.1M | Series A$15M, Apr 2024 |
Carbon markets platform and solutions | S21 | 44 | −6% | +2% | 0 | $16.6M | Series A$13.5M, Apr 2023 |
Predictive Explorer and Driller for Critical Metal Deposits | S19 | 44 | +13% | +33% | 0 | $34M | Series B$20M, Jan 2025 |
maximizing biomass on low quality land | W20 | 39 | +5% | +15% | YC | $49M | Undisclosed round$13M, Apr 2026 |
Turning food waste into Biochar to remove CO2 from the atmsophere | S17 | 39 | −5% | −9% | 0 | $9.5M | Non-equity support$250K, Apr 2025 |
Software to find the best sites for renewables on the electrical grid | W22 | 38 | +23% | +27% | YC | $500K | Seed$500K, May 2025 |
Unmanned airships for inspecting our critical assets | S23 | 37 | +37% | +42% | 1 | $19M | Series A$14.6M, Oct 2026 |
Unlocking carbon markets for European forest owners | W22Acquired | 36 | −12% | −23% | 0 | $3M | Seed$2.5M, Jul 2022 |
Restoring nature to solve climate change. | W19Acquired | 35 | −45% | 0 | $88.3M | Series B$9M, Dec 2023 | |
We help companies automate the accounting of their carbon emissions | S20 | 31 | −11% | −6% | 2 | ||
Carbon capture equipment for ships | W22 | 25 | −4% | −7% | 0 | $7M | Grant$1.5M, Aug 2025 |
Underwater robotic vehicles that collect battery metals responsibly | W22 | 24 | −4% | +9% | 5 | $10.7M | Undisclosed round$93K, Apr 2026 |
AI that tells mining companies where to mine to maximize profits | W20 | 24 | +9% | +20% | 0 | SeedAug 2020 | |
Decarbonized heat and power cheaper than fossil fuels | S17 | 21 | −5% | 0 | $5.3M | Undisclosed round$3.2M, Mar 2024 | |
Building systems to remove carbon dioxide from air at industrial scale | W22 | 19 | −5% | +6% | YC | $6.9M | Seed$6.9M, Mar 2024 |
Enabling li-ion batteries to charge ultra fast without compromising… | W14 | 19 | +6% | +19% | 0 | $3.9M | Grant$3M, Jan 2026 |
Helping corporates achieve Net Zero through tech solutions. | S20 | 18 | −28% | −51% | YC | $15.7M | Seed$13M, Jul 2022 |
We make carbon negative roads | W22 | 17 | −6% | −11% | 0 | $104K | Undisclosed round$104K, Mar 2026 |
Reliable and affordable solar energy in developing countries. | S15 | 17 | +6% | +6% | 0 | $120K | YC investment$120K, Aug 2015 |
AI powered sensors that save energy, water and emissions | W20Acquired | 14 | −7% | −7% | 0 | $8M | Seed$4M, May 2023 |
Renewable infrastructure deployment at scale. | S24 | 12 | +140% | 0 | $4.4M | Seed$3.9M, Apr 2026 | |
Biodegradable and carbon neutral textiles, engineered from food waste. | S22 | 12 | −8% | +9% | 0 | $2M | Grant$216K, Jun 2023 |
Streamlining Data Capture to Report Creation for Heavy Industries | X25 | 11 | +57% | +83% | 0 | $500K | YC investment$500K, Jun 2025 |
Building a nervous system for the atmosphere | S24 | 11 | +22% | 1 | $4.4M | Seed$3.9M, Jun 2025 | |
Foundation models to simulate Earth, starting with weather. | S24 | 11 | −15% | −15% | YC | $500K | YC investment$500K, Sep 2024 |
Turning power into AI compute at speed with modular data centers at… | W22 | 9 | 0% | −10% | 1 | $4.3M | Seed$3.8M, Jun 2022 |
Tasty and scalable cultivated meat at price parity | W21Acquired | 8 | −11% | −27% | 0 | $5.1M | Undisclosed round$5M, Mar 2024 |
We turn waste gases into supply-secure chemicals | S26 | 7 | +17% | +17% | 0 | ||
Electric cargo ships | S22 | 6 | +20% | +20% | YC | $500K | YC investment$500K, Aug 2022 |
Unlocking Virtual Power Plants for rental properties | W22Acquired | 6 | 0% | 0% | 0 | $500K | YC investment$500K, Jun 2022 |
We recycle plastic using engineered enzymes | S22 | 5 | −37% | 0 | $2.2M | Grant$1.6M, Feb 2023 | |
We stop cows from burping methane. | W22 | 5 | 0% | 0% | 0 | $4M | Seed$4M, Apr 2023 |
Affordable and verified direct air carbon capture and storage | S21Inactive | 5 | −17% | −58% | 0 | $10.9M | Grant$40K, Jun 2024 |
We make carbon negative chemicals from CO2 using fermentation | W22 | 4 | −50% | 0 | SeedApr 2025 | ||
Making electric vehicle batteries affordable | S21 | 4 | −43% | −64% | YC | $125K | YC investment$125K, Aug 2021 |
Drones that clear clouds over solar farms and weaken hurricanes | S26 | 3 | 0 | ||||
We turn CO2 into battery-grade graphite and oxygen. | W19 | 3 | −40% | 0 | $6.2M | Undisclosed round$6.2M, Aug 2024 | |
OctaPulse builds computer vision and robotics for fish farms and… | W26 | 2 | YC | $500K | YC investment$500K, Mar 2026 | ||
We build floating solar data centers | S24 | 2 | 0 | $500K | YC investment$500K, Sep 2024 | ||
We enable landlords to generate income from solar panels. | S22 | 2 | 0 | $500K | YC investment$500K, Mar 2023 | ||
Advano is a battery technology company that improve the longevity of… | S17 | 2 | 0 | $46.3M | Series A$3.3M, May 2024 | ||
Wren is a monthly subscription to offset your carbon footprint. | S19 | 297 | 0 | $8.2M | Seed$6.6M, Feb 2022 | ||
Radically reducing capital costs and build time for direct air capture | W21Inactive | 198 | 0 | $22M | Series A$22M, Apr 2023 | ||
Growing seaweed to stabilize the climate. | S21 | ||||||
Cutting edge hydrofoil systems for boatbuilders | W19 |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
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.
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.
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.
# 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
53 Y Combinator companies are in Climate; 43 are active.
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.
By team growth over 6 months (10+ people): Plume (+140%), Rimba (+57%) and HyLight (+37%).
Largest latest rounds in the last 12 months, after their YC batch: HyLight ($14.6M), Living Carbon ($13M) and Plume ($3.9M).