The 56 YC W20 companies whose team grew the most in the last 6 months (active companies with 10+ people).
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| # | Company | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
| 1 | API for at-home health data | 74 | +37% | +72% | 5 | $18.6M | Series A$18M, Mar 2025 |
| 2 | Bathroom cleaning robots for office buildings. | 52 | +27% | +33% | 0 | $21M | Undisclosed round$13.7M, Feb 2025 |
| 3 | AI-powered tech that makes business TV smarter, engaging, and… | 135 | +26% | +101% | 2 | $27.5M | Debt$3.5M, Jul 2026 |
| 4 | Salary advance to employees in Brazil. | 141 | +26% | +76% | 0 | $17.5M | Series A$11M, Aug 2024 |
| 5 | Pre-tax and lifestyle benefits, managed in one place. | 135 | +25% | +67% | 7 | $74.7M | Series B$40M, Jan 2026 |
| 6 | Scalable validation infrastructure for AI agents | 11 | +22% | +22% | 0 | $4.2M | Undisclosed round$4M, Apr 2025 |
| 7 | Building the world's first 1:1 AI teacher. | 102 | +20% | +34% | 1 | $15.4M | Series A$15M, Sep 2023 |
| 8 | The autonomous revenue cycle management platform. | 243 | +19% | +45% | 2 | $220M | Series D$120M, Jul 2026 |
| 9 | Using CRISPR to find treatments for cancer and inflammation | 20 | +18% | +33% | 1 | $21.4M | Series A$12.5M, Aug 2026 |
| 10 | AI for R&D of consumer brands like P&G to develop better products | 22 | +16% | +29% | YC | $18.4M | Series A$16.5M, Jan 2022 |
| 11 | AI estimator & agent for remodelers. | 70 | +15% | +52% | 6 | $5.8M | Series A$5.8M, Jun 2025 |
| 12 | The single platform to analyze, test, observe, and deploy new features | 234 | +15% | +61% | 2 | $182M | Series E$75M, Sep 2025 |
| 13 | The next generation of induced-proximity medicines. | 25 | +14% | +14% | YC | $16M | Undisclosed round$16M, May 2026 |
| 14 | Whatnot is the largest livestream shopping platform in the U.S. | 2,223 | +13% | +35% | 9 | $1.5B | Series G$547M, Aug 2026 |
| 15 | Cortex is the Internal Developer Portal eliminating “developer tax”… | 115 | +13% | +7% | 1 | $113M | Series C$60M, Sep 2024 |
| 16 | Shopify for Real Estate Developers | 18 | +13% | +13% | 0 | $1.3M | Seed$1.1M, Feb 2021 |
| 17 | We build advanced satcom user terminals | 19 | +12% | +36% | 3 | $23.6M | Corporate round$10M, Nov 2025 |
| 18 | We empower the world’s hiring teams to grow engaged, high-performing… | 86 | +12% | +19% | 2 | $55.2M | Series B$25M, Apr 2026 |
| 19 | Monetisation tool for the Indian creator economy | 79 | +11% | +32% | 0 | $1.4M | Equity crowdfunding$55K, Jan 2023 |
| 20 | AI agent for Compliance Questionnaires Automation | 10 | +11% | 1 | $900K | Non-equity support$900K, Nov 2020 | |
| 21 | Homeownership reimagined for the 21st century. | 31 | +11% | +15% | YC | $13.5M | Series A$8M, Nov 2022 |
| 22 | The API to get recordings, transcripts, and metadata from meetings | 43 | +10% | +23% | 3 | $50.7M | Series B$38M, Sep 2025 |
| 23 | Cybersecurity awareness for fast growing companies | 260 | +10% | +47% | YC | $44.2M | Series B$30M, Feb 2025 |
| 24 | We offer free software that automates bureaucracy for real-estate… | 45 | +10% | +36% | 0 | $3.5M | Seed$3.3M, Sep 2020 |
| 25 | Open Finance API platform for Latam. | 125 | +10% | +12% | YC | $70M | Undisclosed round$15M, Apr 2025 |
| 26 | Telehealth provider for India. | 57 | +10% | +14% | 0 | $125K | YC investment$125K, Aug 2021 |
| 27 | Nomic is doing for proteins what Illumina has done for DNA | 116 | +9% | +13% | YC | $60M | Series B$42M, Sep 2024 |
| 28 | AI that tells mining companies where to mine to maximize profits | 24 | +9% | +20% | 0 | SeedAug 2020 | |
| 29 | No-code data syncing between your systems | 12 | +9% | +9% | 0 | $2.4M | Seed$2.4M, Feb 2021 |
| 30 | Real-World Data for Health Innovation | 50 | +9% | +9% | 0 | $20.4M | Series A$10.4M, Sep 2024 |
| 31 | The embedded integration platform for SaaS apps. | 168 | +8% | +21% | YC | $21.2M | Undisclosed round$5.5M, Oct 2024 |
| 32 | Connecting stakeholders across the healthcare ecosystem. | 585 | +8% | +12% | 22 | $234M | Series D$40M, May 2026 |
| 33 | Run full stack apps close to your users. | 56 | +8% | +4% | 0 | $136M | Series D$25M, Jul 2026 |
| 34 | College entrance test preparation App for students in Indonesia | 70 | +6% | +15% | 0 | $150K | Series A$150K, Nov 2020 |
| 35 | maximizing biomass on low quality land | 39 | +5% | +15% | YC | $49M | Undisclosed round$13M, Apr 2026 |
| 36 | Next-generation DNA synthesis using enzymes | 82 | +5% | +21% | 7 | $130M | Series B$46.4M, Oct 2025 |
| 37 | Termii is an AI-native reliability infrastructure company. | 62 | +5% | +11% | 0 | $5.2M | Non-equity support$3.6M, Apr 2026 |
| 38 | Manage the words across your team’s product from design to production. | 22 | +5% | +29% | YC | $13.8M | Series A$12.2M, Jan 2026 |
| 39 | Payroll, compliance, benefits, and Employer of Record services for… | 137 | +5% | +1% | 0 | $10.3M | Non-equity support$5M, Nov 2024 |
| 40 | Speed up non-coding tasks for engineering teams | 48 | +4% | +9% | 0 | $47.6M | Series B$30.1M, Sep 2024 |
| 41 | We create activating antibodies to treat diseases others can’t. | 25 | +4% | +14% | 0 | $12.9M | Seed$7.6M, May 2024 |
| 42 | Robotic Automation for cancer diagnostics - Robotic Microscopes &… | 108 | +4% | +30% | YC | $7.3M | Series A$5M, Nov 2025 |
| 43 | Ultra-precise AI weather forecasting. | 27 | +4% | 0 | $30.8M | Undisclosed round$17.6M, Dec 2024 | |
| 44 | Find culinary products and experiences from great makers everywhere | 28 | +4% | 0 | Pre-seedMar 2020 | ||
| 45 | Medication & support to beat opioid addiction from home | 388 | +3% | +11% | YC | $67.7M | Series B$50M, Dec 2021 |
| 46 | Fast and simple animation tool on the web 💫 | 35 | +3% | +13% | 4 | $150K | YC investment$150K, Mar 2020 |
| 47 | Business banking that helps you grow | 36 | +3% | YC | $101M | Series B$30M, Jul 2023 | |
| 48 | Financing platform for LatAm car dealerships. | 221 | +2% | +10% | 18 | $216M | Debt$143M, Jul 2026 |
| 49 | A virtual address + mailbox for business | 92 | +2% | +16% | 7 | $1M | Series A$1M, Nov 2023 |
| 50 | Creating Microfinance 2.0. | 179 | +2% | +10% | 0 | $1.8M | YC investment$150K, Mar 2021 |
| 51 | Enterprise software to quantify cost-effective decarbonization… | 63 | +2% | +9% | 0 | $36M | Undisclosed round$22M, Mar 2024 |
| 52 | borong is a SaaS-enabled marketplace that connects brands like… | 171 | +1% | +4% | YC | $8.9M | Non-equity support$3M, Jun 2024 |
| 53 | We are connecting every single Mexican to the financial system. | 92 | +1% | +16% | 2 | $82.2M | Series B$50M, Nov 2021 |
| 54 | Challenger bank for enterprises | 186 | +1% | +9% | 6 | $60M | Series B$45M, Apr 2022 |
| 55 | The one-stop shop for mom-and-pop stores in Pakistan to buy inventory. | 262 | +1% | +3% | 0 | $18.9M | Undisclosed round$17M, Jan 2022 |
| 56 | The fastest shipping for online shopping | 1,170 | +1% | +4% | 107 | $129M | Series C$82M, Mar 2022 |
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
229 companies were in Y Combinator's Winter 2020 batch (W20); 134 are active.
28 companies posted roles in the last 60 days, led by 99minutos (107 roles), H1 (22 roles) and Nexu (18 roles). 40 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Junction (+37%), SOMATIC (+27%) and Taiv (+26%).
Largest latest rounds in the last 12 months, after their YC batch: Whatnot ($547M), Candid Health ($120M) and H1 ($40M).