The 31 YC S23 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 | Intelligence that runs your operations. | 260 | +83% | +192% | 36 | $211M | Series C$150M, Aug 2026 |
| 2 | Building and Protecting an Exciting Future | 62 | 0 | $80M | Series A$80M, Jul 2026 | ||
| 3 | AI-native operations for the banks | 107 | +16% | +47% | 1 | $95.3M | Series B$75M, Feb 2026 |
| 4 | The enterprise platform for AI phone calls | 123 | +4% | +38% | 5 | $106M | Series C$50M, Jun 2026 |
| 5 | AI patent drafting, prosecution, litigation and more for legal teams. | 72 | +33% | +125% | 3 | $55M | Series B$40M, Dec 2025 |
| 6 | End-to-end content, learning, & deal intelligence for B2B sales teams | 68 | +45% | +183% | YC | $55M | Series B$40M, Feb 2026 |
| 7 | AI Phone Agents for Healthcare Operations | 70 | +100% | +400% | 4 | $35M | Series A$30M, Jun 2026 |
| 8 | The World's First Multi-Agent System for Procurement | 149 | +22% | +192% | 6 | $30M | Series A$30M, Mar 2026 |
| 9 | AI-powered user interviews | 113 | +43% | +232% | 25 | $51.3M | Series B$30M, Dec 2025 |
| 10 | The operating system for inbound B2B revenue | 63 | −41% | −35% | YC | $29.2M | Undisclosed round$26M, Apr 2026 |
| 11 | Fast Models Optimized for Coding Agents | 3 | YC | $22.5M | Seed$22M, May 2026 | ||
| 12 | Plaid for Telematics Data in Commercial Trucking | 74 | +28% | +90% | 1 | $23.1M | Series A$20M, Jul 2026 |
| 13 | Software that streams data from databases to warehouses in real-time | 23 | +21% | +92% | 2 | $18.9M | Series A$15.1M, Jan 2026 |
| 14 | Autonomous surgical robots | 19 | +90% | +73% | 5 | $15.6M | Series A$15M, Aug 2026 |
| 15 | All-in-one POS for liquor stores | 198 | +26% | +37% | YC | $22.6M | Series A$15M, Oct 2026 |
| 16 | Automating Compliance for Construction | 62 | +51% | +148% | YC | $21.8M | Series A$15M, Jul 2026 |
| 17 | Unmanned airships for inspecting our critical assets | 37 | +37% | +42% | 1 | $19M | Series A$14.6M, Oct 2026 |
| 18 | Headcount & Compensation Management | 28 | −3% | +4% | 0 | $18.3M | Seed$13.5M, Oct 2026 |
| 19 | AI Customer Service Agents for trades and field services | 39 | +50% | +117% | 1 | $16.4M | Series A$12.9M, Jan 2026 |
| 20 | AI Powered All-In-One Payroll, HR + Recruiting | 22 | +22% | +57% | YC | $17.1M | Series A$12M, Apr 2026 |
| 21 | AI Compliance Platform for Healthcare Organizations | 24 | +100% | +300% | 1 | $11M | Series A$11M, Oct 2026 |
| 22 | A construction payroll and compliance platform built for specialty… | 38 | −7% | +100% | YC | $17M | Series A$10M, Mar 2026 |
| 23 | Farm Genetics Made Easy - Using DNA and Software | 25 | +14% | +127% | 0 | $5.8M | Seed$5.3M, Dec 2025 |
| 24 | We get patients to their next appointment | 10 | +11% | +67% | YC | $5.5M | Seed$5M, Jun 2026 |
| 25 | The all-in-one EMR built for med spas and elective care | 17 | +42% | +89% | 5 | $4.5M | Seed$4M, Nov 2025 |
| 26 | AI Coordination Layer for Supply Chain | 16 | +7% | +100% | 0 | $4.4M | Seed$3.9M, Mar 2026 |
| 27 | The inbox that handles itself | 9 | 0% | −18% | 0 | $3.5M | Pre-seed$3M, Jun 2026 |
| 28 | AI that finds the right buyers and books sales meetings | 50 | −2% | −2% | 0 | $3M | Seed$3M, Apr 2026 |
| 29 | AI agents for fintech risk and compliance operations | 18 | +29% | +50% | 1 | $2.9M | Seed$2.4M, Mar 2026 |
| 30 | Digital banking platform for the 30 million smartphone users in DRC. | 5 | 0% | 0% | 0 | $500K | Pre-seed$500K, Feb 2026 |
| 31 | The cheapest way to borrow money | 26 | +73% | +225% | 1 | $500K | Seed$500K, Jun 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
220 companies were in Y Combinator's Summer 2023 batch (S23); 178 are active.
37 companies posted roles in the last 60 days, led by HappyRobot (36 roles), Outset (25 roles) and Langdock (12 roles). 87 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Shadeform (+110%), Prosper (+100%) and Readily (+100%).
Largest latest rounds in the last 12 months, after their YC batch: HappyRobot ($150M), Singularity ($80M) and Bretton AI ($75M).