Get an API keyGet an API keyThe 16 YC S16 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 |  The Smart Market Powering The Future | 83 | +38% | +60% | 2 | $81.3M | Series B$32M, Nov 2024 |
| 2 |  Expo brings together the best of web and native app development | 205 | +17% | +41% | 0 | $45.1M | Series B$45M, Apr 2026 |
| 3 |  | 16 | +14% | +7% | 0 | $220K | Grant$100K, Jan 2020 |
| 4 |  Bridging a world of consumer-permissioned credit data | 131 | +11% | +19% | YC | $159M | Series D$35M, Oct 2025 |
| 5 |  Powering the animal health supply chain. | 366 | +9% | +21% | YC | $3M | Pre-seed$3M, Aug 2016 |
| 6 |  Robotic production capacity for the pharma manufacturing industry | 76 | +7% | +31% | 10 | $97.7M | Series B$75M, Oct 2026 |
| 7 |  Instrumentl automates grant discovery and management for nonprofits. | 121 | +6% | +9% | 1 | $55M | Private equity$55M, Apr 2025 |
| 8 |  RocketLit is an adaptive learning and assessment platform. | 23 | +5% | +10% | 0 | $120K | YC investment$120K, Aug 2016 |
| 9 |  We make booking services as easy as buying products online. | 107 | +4% | +13% | YC | $10.7M | Series A$8M, Mar 2021 |
| 10 |  Legal investment firm | 81 | +4% | +9% | 1 | $100M | Undisclosed round$100M, Sep 2019 |
| 11 |  Helping businesses make and accept payments from anywhere in Africa. | 893 | +3% | −1% | 0 | $476M | Undisclosed round$250M, Jul 2026 |
| 12 |  Sustainable period care. | 44 | +2% | 0 | $7.7M | Undisclosed round$3.6M, Apr 2020 | |
| 13 |  The platform for all your life events. | 503 | +2% | +8% | YC | $107M | Series B$60M, Nov 2022 |
| 14 |  Customer support as a service. | 56 | +2% | +8% | YC | $500K | Undisclosed round$500K, Sep 2021 |
| 15 |  Platform to grow your barbershop and maximize profitability. | 227 | +2% | −3% | 5 | $202M | Debt$35M, Nov 2024 |
| 16 |  A concierge service for seniors’ rides, meals, meds, home and more. | 207 | +1% | −12% | YC | $160K | Grant$40K, Jun 2019 |
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
102 companies were in Y Combinator's Summer 2016 batch (S16); 42 are active.
11 companies posted roles in the last 60 days, led by Scale AI (18 roles), Athelas (14 roles) and Multiply Labs (10 roles). 16 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): OneChronos (+38%), Expo (+17%) and Vote.org (+14%).
Largest latest rounds in the last 12 months, after their YC batch: Flutterwave ($250M), Multiply Labs ($75M) and Expo ($45M).