Get an API keyGet an API keyThe 14 YC S17 companies whose team shrank the most in the last 12 months (active companies that had 20+ people a year ago).
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 |  Your voice. Your health. We care. | 22 | −42% | −45% | 0 | $5.3M | Seed$5.2M, Oct 2017 |
| 2 |  Automated factory to produce insect protein for farm animals. | 19 | −17% | −21% | 0 | $18.6M | Undisclosed round$2.6M, Jul 2024 |
| 3 |  Africa's #1 healthcare technology provider. | 109 | −6% | −20% | 8 | $62.7M | Series B$30M, Jun 2023 |
| 4 |  Customer intelligence for Enterprise CX teams. The grounded… | 40 | −9% | −11% | 1 | $1.8M | Grant$212K, Jul 2020 |
| 5 |  | 18 | 0% | −10% | 0 | $150K | Seed$120K, Apr 2022 |
| 6 |  Turning food waste into Biochar to remove CO2 from the atmsophere | 39 | −5% | −9% | 0 | $9.5M | Non-equity support$250K, Apr 2025 |
| 7 |  AI-powered checkout for retail. | 87 | −10% | −8% | YC | $239M | Undisclosed round$900K, Aug 2026 |
| 8 |  Turnkey security & hassle-free cyber insurance from leading insurers | 24 | −8% | −8% | 0 | $15M | Series A$8M, Oct 2023 |
| 9 |  AI-Powered Building Management | 109 | +2% | −8% | 1 | $82.6M | Series C$60M, Nov 2021 |
| 10 |  We make high definition radar allowing self-driving cars to see in… | 59 | 0% | −6% | 2 | $22.5M | Undisclosed round$4M, Nov 2023 |
| 11 |  Decarbonized heat and power cheaper than fossil fuels | 21 | −5% | 0 | $5.3M | Undisclosed round$3.2M, Mar 2024 | |
| 12 |  LTSE is an ecosystem for visionary business. | 64 | −4% | 0 | $169M | Series C$100M, Jun 2022 | |
| 13 |  OneLocal is a CRM for local businesses. | 86 | +2% | −4% | 2 | Series AOct 2019 | |
| 14 |  Data-driven teacher hiring | 45 | −4% | −4% | YC | $120K | Seed$120K, Jan 2018 |
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
125 companies were in Y Combinator's Summer 2017 batch (S17); 54 are active.
23 companies posted roles in the last 60 days, led by Jerry (47 roles), Flock Safety (32 roles) and BillionToOne (21 roles). 19 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Prelim (+38%), Skyways (+16%) and AssemblyAI (+16%).
Largest latest rounds in the last 12 months, after their YC batch: Flock Safety ($200M), Standard AI ($900K) and tpaga ($700K).