The 43 YC S21 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 | Secoda is the AI layer for your Analytics | 18 | −66% | 0 | $16.4M | Series A$14.1M, Sep 2023 | |
| 2 | We are the frictionless way for companies to make payments. | 20 | −9% | −57% | 0 | $3.7M | Seed$3.6M, Jan 2023 |
| 3 | Affogato AI, Your Agent for instant TikToks, Reels, and ads. | 10 | −9% | −50% | 0 | SeedJan 2024 | |
| 4 | Using the immune system to cure disease | 22 | −31% | −49% | 7 | $25.6M | Series A$21M, Jun 2025 |
| 5 | Helping Indians make better financial decisions. | 37 | −21% | −45% | 0 | $125K | YC investment$125K, Nov 2021 |
| 6 | Self-Service Data Prep and Blend Built for Data Teams. | 15 | −32% | −40% | 0 | ||
| 7 | Tech-powered equipment rentals in Latam. | 14 | −12% | −39% | 0 | $4.6M | Seed$4.5M, Sep 2021 |
| 8 | Datlo helps companies increase sales and expand through data | 50 | +4% | −24% | 0 | $838K | Seed$713K, May 2025 |
| 9 | Security Delivery Platform to orchestrate AI agents for Service… | 19 | −24% | 0 | $3.7M | Seed$3.3M, Oct 2024 | |
| 10 | The AI Cowork for big data | 16 | −16% | −24% | YC | $6.4M | Seed$6.3M, Nov 2022 |
| 11 | Online Coding School for Kids 8-16 | 21 | −5% | −22% | YC | $1.4M | Seed$1.3M, Feb 2023 |
| 12 | First ECG AI to go beyond diagnostics and recommend treatment | 34 | −19% | −19% | YC | $135K | Grant$10K, Nov 2023 |
| 13 | Online cohort based courses for architects, engineers and designers… | 261 | −7% | −16% | 0 | $1.2M | Seed$1.2M, May 2023 |
| 14 | AI to understand and automates the physical world | 20 | −9% | −13% | 1 | SeedSep 2022 | |
| 15 | Instant lab tests on your smartphone | 42 | −2% | −12% | YC | $2.4M | Seed$2M, Feb 2024 |
| 16 | Get matched with top 1% of talents in 24h | 134 | −10% | −11% | 1 | $2.9M | Non-equity support$800K, Mar 2022 |
| 17 | A national network of microschools bringing school choice to every… | 34 | −11% | YC | $1.6M | Seed$1.5M, Jan 2024 | |
| 18 | The world's largest financial education and community app for women | 44 | −2% | −10% | 0 | $17.3M | Series A$11.1M, Jul 2024 |
| 19 | Retaining employees in LatAm via education | 53 | −10% | 0 | $3.9M | Seed$2.4M, Oct 2021 | |
| 20 | On-demand auto maintenance & repairs | 60 | −3% | −9% | 0 | $5.2M | Seed$2.4M, Sep 2023 |
| 21 | We make software for bookkeepers. | 81 | −2% | −9% | 1 | $15.1M | Series A$6.5M, Dec 2025 |
| 22 | Autonomous team of AI agents that runs the entire hospital operations | 71 | +3% | −9% | YC | $30M | Undisclosed round$21.8M, Oct 2025 |
| 23 | One-stop-shop for restaurants to operate and grow their business. | 51 | −6% | −9% | 1 | $5.6M | Seed$5.3M, Oct 2021 |
| 24 | Corporate Card solution for Indian businesses | 127 | −8% | −9% | 0 | $38.3M | Debt$7.1M, May 2022 |
| 25 | Gusto for India | 88 | −3% | −8% | 1 | $4.1M | Seed$4M, Sep 2021 |
| 26 | Discovering drugs that target the DNA regulome | 24 | −8% | −8% | 0 | $27.8M | Seed$11.2M, Sep 2026 |
| 27 | Super AI Accountant for SMBs | 79 | −7% | −7% | 0 | $2.1M | Non-equity support$2M, Aug 2026 |
| 28 | Uber for Healthcare in Latinamerica | 71 | −1% | −7% | 0 | $43.1M | Series B$750K, Jan 2026 |
| 29 | Smart micro financing for everyone | 81 | −9% | −6% | 2 | $167M | Debt$22.9M, Jun 2026 |
| 30 | Super Hyperlocal Marketplace for SMEs in Indonesia | 72 | −4% | −5% | 0 | $125K | YC investment$125K, Aug 2021 |
| 31 | Latin America's Deposits Marketplace for Banks | 73 | +3% | −5% | 0 | $2M | Seed$1M, Apr 2025 |
| 32 | Learning platform for job seekers with job applications automation | 533 | −5% | −5% | 0 | $9.5M | Series A$8M, Mar 2023 |
| 33 | 1:1 ADHD coaching, 5-10X More affordable than alternatives | 57 | −5% | YC | $3.6M | Seed$25K, Sep 2024 | |
| 34 | Home Internet for urban Latin America | 19 | −5% | −5% | 0 | $4.1M | Seed$4.1M, Aug 2021 |
| 35 | SaaS Platform to manage IT and buy business software | 21 | −5% | −5% | 0 | $125K | YC investment$125K, Nov 2021 |
| 36 | We help automotive aftermarket brands to supply and sell parts online | 66 | −3% | −4% | 0 | $125K | Undisclosed round$125K, Jan 2023 |
| 37 | Programmable biology company for psychoactive effect design | 23 | −4% | −4% | 0 | $24.3M | Seed$12.7M, Feb 2025 |
| 38 | The B2B Payments Platform | 37 | −3% | −3% | 2 | $252M | Debt$15M, Jul 2024 |
| 39 | Chime for Canada, starting with cash advances | 37 | −3% | 4 | $125K | YC investment$125K, Jan 2023 | |
| 40 | Sell anything | 74 | −7% | −1% | 1 | $4.2M | Seed$4.2M, Feb 2023 |
| 41 | Financial data your AI can actually trust | 82 | +1% | −1% | 0 | $3M | Seed$1M, Aug 2021 |
| 42 | A mobile app. It allows employees to get paid their salary on-demand. | 84 | +5% | −1% | 1 | $64M | Undisclosed round$21.7M, Jun 2025 |
| 43 | Water risk mitigation for industrial sites | 102 | −1% | 0 | $18.3M | Non-equity support$150K, Sep 2026 |
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
390 companies were in Y Combinator's Summer 2021 batch (S21); 284 are active.
50 companies posted roles in the last 60 days, led by Stepful (36 roles), Exa (28 roles) and ARQ (24 roles). 85 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Hirebolt (+100%), Aqua (+93%) and Confido (+89%).
Largest latest rounds in the last 12 months, after their YC batch: Exa ($250M), Slash ($100M) and Turion Space ($75M).