The 66 YC S23 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 GPU Cloud Marketplace | 21 | +110% | +200% | YC | SeedJan 2025 | |
| 2 | AI Phone Agents for Healthcare Operations | 70 | +100% | +400% | 4 | $35M | Series A$30M, Jun 2026 |
| 3 | AI Compliance Platform for Healthcare Organizations | 24 | +100% | +300% | 1 | $11M | Series A$11M, Oct 2026 |
| 4 | Autonomous surgical robots | 19 | +90% | +73% | 5 | $15.6M | Series A$15M, Aug 2026 |
| 5 | Intelligence that runs your operations. | 260 | +83% | +192% | 36 | $211M | Series C$150M, Aug 2026 |
| 6 | AI for ASIC Design Verification | 16 | +78% | +167% | 0 | $500K | YC investment$500K, Sep 2023 |
| 7 | TurboTax for Medicaid | 28 | +75% | +65% | 1 | $22.3M | Series A$18.3M, Jul 2025 |
| 8 | AI-powered risk and compliance for financial institutions | 14 | +75% | YC | $11M | Non-equity support$11M, Mar 2026 | |
| 9 | The cheapest way to borrow money | 26 | +73% | +225% | 1 | $500K | Seed$500K, Jun 2026 |
| 10 | Superhuman video production as a service | 15 | +67% | +67% | YC | SeedFeb 2025 | |
| 11 | AI contract repository | 13 | +63% | +44% | 0 | SeedOct 2023 | |
| 12 | AI-driven Retention Automation for subscription media businesses. | 16 | +60% | +129% | 0 | $1.6M | Pre-seed$1.6M, Feb 2024 |
| 13 | AI-native platform for corporate meetings and events | 19 | +58% | +46% | YC | $2.5M | Seed$2M, Dec 2024 |
| 14 | Automating Compliance for Construction | 62 | +51% | +148% | YC | $21.8M | Series A$15M, Jul 2026 |
| 15 | The all-in-one AI platform for companies. | 74 | +51% | +155% | 12 | $3.5M | Seed$3M, Apr 2024 |
| 16 | AI Customer Service Agents for trades and field services | 39 | +50% | +117% | 1 | $16.4M | Series A$12.9M, Jan 2026 |
| 17 | AI revenue recovery for underpaid healthcare claims. | 12 | +50% | YC | $2.8M | Seed (before YC)$2.8M, May 2023 | |
| 18 | The AI Native ERP for the fastest growing companies. | 199 | +45% | +165% | 11 | $108M | Series B$65M, Oct 2025 |
| 19 | End-to-end content, learning, & deal intelligence for B2B sales teams | 68 | +45% | +183% | YC | $55M | Series B$40M, Feb 2026 |
| 20 | AI-powered user interviews | 113 | +43% | +232% | 25 | $51.3M | Series B$30M, Dec 2025 |
| 21 | The all-in-one EMR built for med spas and elective care | 17 | +42% | +89% | 5 | $4.5M | Seed$4M, Nov 2025 |
| 22 | Unmanned airships for inspecting our critical assets | 37 | +37% | +42% | 1 | $19M | Series A$14.6M, Oct 2026 |
| 23 | AI for Government Contracting. | 19 | +36% | +36% | YC | $2.3M | Seed$2.2M, Aug 2024 |
| 24 | AI patent drafting, prosecution, litigation and more for legal teams. | 72 | +33% | +125% | 3 | $55M | Series B$40M, Dec 2025 |
| 25 | Marketplace for Rare Coins & Precious Metals | 12 | +33% | +50% | 3 | $15.6M | Undisclosed round$15.6M, Nov 2025 |
| 26 | Revenue Activation Platform | 69 | +30% | +103% | 6 | $18.3M | Series A$15M, Sep 2025 |
| 27 | AI agents for fintech risk and compliance operations | 18 | +29% | +50% | 1 | $2.9M | Seed$2.4M, Mar 2026 |
| 28 | AI Agents For RFP and Questionnaire Response Automation | 18 | +29% | +38% | 0 | $4.5M | Seed$4M, Aug 2024 |
| 29 | Plaid for Telematics Data in Commercial Trucking | 74 | +28% | +90% | 1 | $23.1M | Series A$20M, Jul 2026 |
| 30 | All-in-one POS for liquor stores | 198 | +26% | +37% | YC | $22.6M | Series A$15M, Oct 2026 |
| 31 | AI Support Agent for Enterprises. | 128 | +24% | +156% | 3 | $64.6M | Series A$61M, Aug 2025 |
| 32 | Digital-native home painting franchise | 31 | +24% | +19% | 1 | $15M | Seed$11M, Sep 2023 |
| 33 | AI Powered All-In-One Payroll, HR + Recruiting | 22 | +22% | +57% | YC | $17.1M | Series A$12M, Apr 2026 |
| 34 | AI agents that run insurance operations | 22 | +22% | +100% | 1 | $4.8M | Seed$2.3M, Sep 2025 |
| 35 | The World's First Multi-Agent System for Procurement | 149 | +22% | +192% | 6 | $30M | Series A$30M, Mar 2026 |
| 36 | Software that streams data from databases to warehouses in real-time | 23 | +21% | +92% | 2 | $18.9M | Series A$15.1M, Jan 2026 |
| 37 | Personalized learning built for schools | 37 | +19% | +76% | YC | $15.5M | Series ANov 2025 |
| 38 | iMessage for Sales | 65 | +18% | +30% | 1 | ||
| 39 | Live intelligence for biopharma teams. | 13 | +18% | +86% | YC | $3.6M | Seed$3.1M, Apr 2025 |
| 40 | AI enabled marketplace matching trucks with jobs | 33 | +18% | +27% | 2 | $15.5M | Series A$15M, Oct 2025 |
| 41 | Make Banking Magical | 60 | +18% | +40% | 3 | $32.9M | Series A$29M, Aug 2025 |
| 42 | AI-native operations for the banks | 107 | +16% | +47% | 1 | $95.3M | Series B$75M, Feb 2026 |
| 43 | The compliant AI colleague for sales teams in Europe | 15 | +15% | +36% | 0 | $2.5M | Pre-seed$2M, Jul 2025 |
| 44 | Build a website by chatting with AI | 15 | +15% | +15% | 0 | Pre-seedAug 2023 | |
| 45 | Shopify for Homebuilders | 15 | +15% | +50% | 0 | Pre-seedJun 2023 | |
| 46 | Search engine for trustworthy medical information. | 16 | +14% | +23% | 0 | SeedDec 2024 | |
| 47 | Farm Genetics Made Easy - Using DNA and Software | 25 | +14% | +127% | 0 | $5.8M | Seed$5.3M, Dec 2025 |
| 48 | Helping businesses in emerging markets make pay their international… | 102 | +13% | +67% | YC | $18M | Series A$18M, Feb 2025 |
| 49 | Stripe for HSA/FSA payments | 51 | +13% | +31% | YC | $18.2M | Series A$15M, Sep 2025 |
| 50 | Manage energy cost & usage with AI for facility & sustainability teams | 10 | +11% | +11% | YC | $500K | YC investment$500K, Jan 2024 |
| 51 | A compliance training platform built for regulated industries. | 10 | +11% | −29% | 0 | $500K | YC investment$500K, Jan 2024 |
| 52 | We get patients to their next appointment | 10 | +11% | +67% | YC | $5.5M | Seed$5M, Jun 2026 |
| 53 | Combination therapeutics for the world's toughest diseases | 10 | +11% | +11% | 0 | $8.7M | Seed$4.5M, Mar 2025 |
| 54 | The fastest way to build AI assistants on technical content | 51 | +11% | +50% | YC | $3.7M | Seed$3.2M, Oct 2024 |
| 55 | Virtual Care for Type 2 Diabetes Reversal | 62 | +11% | +24% | 2 | $500K | YC investment$500K, Sep 2023 |
| 56 | AI-powered forecasting & replenishment for grocery | 11 | +10% | YC | |||
| 57 | Navigating patients to the right place, first time. | 46 | +10% | +28% | 5 | $3.9M | Seed$3.4M, Jul 2024 |
| 58 | Running clinical trials with AI | 23 | +10% | +15% | 0 | Pre-seed (before YC)Apr 2023 | |
| 59 | AI-Native CPQ & Billing for Modern Pricing Models | 83 | +9% | +20% | YC | $4.5M | Seed$4M, Sep 2025 |
| 60 | Fast, reliable, reproducible AI with GPU live migration | 14 | +8% | +17% | YC | $500K | YC investment$500K, Sep 2023 |
| 61 | AI Coordination Layer for Supply Chain | 16 | +7% | +100% | 0 | $4.4M | Seed$3.9M, Mar 2026 |
| 62 | Using generative AI to call insurance for healthcare clinics | 16 | +7% | +14% | YC | $500K | YC investment$500K, Sep 2023 |
| 63 | Claims infrastructure for African health insurance | 71 | +6% | +8% | 0 | $785K | Debt$285K, Jun 2026 |
| 64 | The open-source document editor for humans and AI agents. | 19 | +6% | 0 | $2.6M | Seed$2.6M, Oct 2023 | |
| 65 | The enterprise platform for AI phone calls | 123 | +4% | +38% | 5 | $106M | Series C$50M, Jun 2026 |
| 66 | Your 24/7 AI Recruiter | 28 | +4% | +27% | 0 | $2M | Seed$1.5M, Jan 2025 |
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).