The 38 YC S19 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 | Human and AI design review for hardware | 281 | +31% | +71% | 2 | $134M | Debt$728K, Mar 2026 |
| 2 | Learn how to build a scalable growth engine | 13 | +30% | +18% | 0 | SeedAug 2019 | |
| 3 | A better data science notebook. | 22 | +29% | −31% | YC | $23.8M | Series A$20M, Jan 2022 |
| 4 | Point of sale financing for Latin America's middle class. | 27 | +29% | +17% | 0 | $150K | YC investment$150K, Aug 2019 |
| 5 | Payment Platform for LatAm Micro and Small Businesses | 116 | +23% | +26% | YC | $88.5M | Debt$42.3M, Feb 2026 |
| 6 | Construction & industrial logistics platform. | 318 | +21% | +42% | 1 | $48.1M | Series B$42M, Jul 2024 |
| 7 | Modern online payments for the Philippines | 143 | +20% | +17% | 0 | $45.7M | Series B$31M, Feb 2022 |
| 8 | Modern medical billing | 23 | +15% | +21% | YC | $150K | YC investment$150K, Aug 2019 |
| 9 | The leading Composable CDP and AI Decisioning platform | 658 | +14% | +51% | 52 | $332M | Series D$150M, Apr 2026 |
| 10 | Making diverse, high-quality data easily available to anyone, anywhere | 1,580 | +14% | +72% | 19 | $33.5M | Series A$32.3M, Jul 2023 |
| 11 | TRM is building a safer world for billions of people. | 481 | +14% | +36% | 67 | $220M | Series C$70M, Sep 2026 |
| 12 | Modern ecommerce for petite women | 190 | +14% | +23% | 3 | $2.9M | Seed$2.9M, Sep 2021 |
| 13 | Predictive Explorer and Driller for Critical Metal Deposits | 44 | +13% | +33% | 0 | $34M | Series B$20M, Jan 2025 |
| 14 | The Fastest Scientific Computing Platform on the Planet | 10 | +11% | YC | $150K | Series A$150K, Mar 2022 | |
| 15 | A zero inventory, zero returns factory-to-consumer apparel company | 53 | +10% | +18% | YC | $150K | YC investment$150K, Mar 2021 |
| 16 | Building the safety net of the future | 320 | +10% | +20% | 3 | $19.5M | Undisclosed round$500K, Jun 2024 |
| 17 | The LatAm tech-enabled real estate broker to buy and sell houses. | 252 | +9% | +7% | 0 | $13.4M | Series A$10M, Aug 2022 |
| 18 | We build robots for dull, dirty, and dangerous jobs. | 90 | +8% | +8% | 1 | $36.4M | Series B$20M, Mar 2026 |
| 19 | We help companies scale marketing campaigns through WhatsApp | 66 | +8% | +2% | 0 | $15M | Series A$15M, Jul 2022 |
| 20 | Building a better way to meet online. | 82 | +8% | −13% | 2 | $76M | Series B$50M, Nov 2021 |
| 21 | Household needs, from bread to everything. | 2,667 | +7% | +21% | 0 | $89M | Series C$50M, Feb 2026 |
| 22 | Building the NASDAQ for Real Estate. | 19 | +6% | +6% | 0 | $5M | Undisclosed round$3M, Feb 2022 |
| 23 | AI platform accelerating therapies for rare & inflammatory diseases. | 20 | +5% | +18% | 0 | $22.5M | Undisclosed round$5.5M, Dec 2025 |
| 24 | Discovering the true signals of disease to power life-changing drugs. | 21 | +5% | +17% | 0 | Undisclosed roundMay 2021 | |
| 25 | Online pets supplies for Latin America with over 4000 products & 20… | 393 | +4% | +2% | 0 | $65M | Secondary$48M, May 2023 |
| 26 | Canix makes it easy to get and stay compliant as a cannabis business. | 28 | +4% | −3% | 0 | $14M | Series A$10M, Jun 2022 |
| 27 | Workforce platform to recruit, license, credential & manage clinicians | 116 | +4% | +6% | 17 | $3M | Undisclosed round$3M, Nov 2022 |
| 28 | Financial connectivity API for consumer liabilities | 89 | +3% | +22% | 8 | $60.5M | Series B$42M, Jan 2025 |
| 29 | Helping create a smaller, fairer, safer justice system | 120 | +3% | +18% | YC | $200K | Grant$100K, Jan 2025 |
| 30 | LineLeap gets customers to the fun, faster. | 92 | +3% | −11% | 1 | $30.8M | Undisclosed round$10M, Nov 2025 |
| 31 | All-In-One Creator Store | 31 | +3% | +7% | YC | $3.5M | Seed$200K, May 2022 |
| 32 | Our operations software makes it easier to run--and grow--your cafe | 221 | +3% | +11% | 21 | $352M | Undisclosed round$96M, Aug 2026 |
| 33 | Your global dollar account powered by stablecoins | 64 | +3% | 0 | |||
| 34 | AI recruiter for India's massive blue-collar workforce | 362 | +3% | +1% | 1 | $18M | Undisclosed round$10M, Jul 2025 |
| 35 | In-Person, Hybrid and Virtual Event Management Software | 102 | +3% | +2% | YC | $4M | Seed$1M, Nov 2021 |
| 36 | Modern payroll for modern work | 40 | +3% | +5% | 0 | $30.4M | Series B$15M, Oct 2024 |
| 37 | Building AI therapeutics for physical health conditions like IBS. | 48 | +2% | +4% | 0 | $19.7M | Series A$12M, Mar 2023 |
| 38 | UpEquity gives homebuyers more certainty and power. | 62 | +2% | +3% | 1 | $277M | Debt$200M, Jun 2025 |
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
174 companies were in Y Combinator's Summer 2019 batch (S19); 100 are active.
19 companies posted roles in the last 60 days, led by TRM Labs (67 roles), Lokal (63 roles) and Hightouch (52 roles). 30 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): CoLab (+31%), Demand Curve (+30%) and Deepnote (+29%).
Largest latest rounds in the last 12 months, after their YC batch: Hightouch ($150M), Odeko ($96M) and TRM Labs ($70M).