The 19 YC W25 companies whose latest reported round, after their YC batch and in the last 12 months, was the largest.
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 | AI-native commercial insurance brokerage | 85 | +35% | +158% | 14 | $47.5M | Series A$47M, Feb 2026 |
| 2 | Applied research lab curating data solutions for foundation model… | 286 | +58% | +186% | 25 | $30.5M | Series B$30M, Sep 2026 |
| 3 | AI agents for CX teams, starting with training and QA. | 43 | +48% | +187% | 2 | $32.7M | Series A$25M, Apr 2026 |
| 4 | The Javascript framework for building AI agents, from the Gatsby devs | 62 | +19% | +44% | 0 | $35M | Series A$22M, Apr 2026 |
| 5 | AI-native ATS/CRM for recruiting firms | 47 | +96% | +327% | 2 | $24.2M | Series A$21M, Sep 2026 |
| 6 | The data layer for perceptual intelligence | 44 | +300% | +450% | 2 | $24M | Series A$20M, Aug 2026 |
| 7 | Pending CFTC regulation to be the first cash and physically settled… | 13 | YC | $15M | Seed$15M, Sep 2026 | ||
| 8 | Platform and marketplace for RL environments and AI data | 16 | +7% | +23% | YC | $16.2M | Series A$14M, Jun 2026 |
| 9 | AI to understand and then route engineering work | 25 | +32% | +127% | 2 | $18.2M | Series A$13.5M, Jul 2026 |
| 10 | Making humanoids dexterous enough to thread a needle | 17 | +42% | +31% | YC | $11M | Seed$11M, Jun 2026 |
| 11 | Reusable Satellites | 10 | −41% | −41% | YC | $7.1M | Seed$7.1M, Dec 2025 |
| 12 | Query mission-critical video | 22 | +29% | +69% | 0 | $14.4M | Seed$7M, Mar 2026 |
| 13 | Discovering new pesticides with AI | 4 | −33% | 0 | $6.5M | Seed$6M, Nov 2025 | |
| 14 | Fusion reactors for ships | 2 | YC | $5M | Seed$4.5M, Nov 2025 | ||
| 15 | Autonomous patrol-boats for National Security | 10 | +25% | +43% | YC | $4.7M | Seed$4.2M, Jul 2026 |
| 16 | Ergo is the context layer that helps revenue teams close more deals. | 11 | +57% | +83% | YC | $3.3M | Seed$2.8M, Jun 2026 |
| 17 | AI hiring platform powered by expert recruiters | 62 | +13% | +130% | 0 | $2.8M | Seed$2.3M, May 2026 |
| 18 | AI quote & order processing for technical distributors & manufacturers | 24 | +14% | +4% | YC | $2.6M | Seed$2.1M, Dec 2025 |
| 19 | AI Accountant for Accounting Firms | 16 | +45% | +129% | YC | $1.5M | Seed$1M, Mar 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
166 companies were in Y Combinator's Winter 2025 batch (W25); 159 are active.
15 companies posted roles in the last 60 days, led by AfterQuery (25 roles), Harper (14 roles) and SalesPatriot (3 roles). 66 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Mundo AI (+300%), Mosaic (+117%) and Spott (+96%).
Largest latest rounds in the last 12 months, after their YC batch: Harper ($47M), AfterQuery ($30M) and Solidroad ($25M).