The 63 YC W24 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 relationship intelligence platform for enterprise revenue | 29 | +107% | +142% | 3 | $19.5M | Series A$15M, Jul 2026 |
| 2 | AI Time Platform for Law Firms | 42 | +100% | +320% | 9 | $19.6M | Series A$16M, Mar 2026 |
| 3 | The unified context layer for enterprise data | 10 | +100% | +67% | YC | $2.3M | YC investment$500K, Mar 2024 |
| 4 | Practice admin run by AI | 15 | +88% | +150% | YC | $6M | Pre-seed$6M, Feb 2024 |
| 5 | Yarn is the video product for agentic GTM teams. | 13 | +86% | +160% | YC | $500K | Seed$500K, Jan 2026 |
| 6 | Modern health insurance for dual income families | 42 | +83% | +147% | YC | $14.5M | Series A$14M, Jul 2026 |
| 7 | The agentic operating system for legal work | 980 | +81% | +321% | 123 | $866M | Series D$50M, Apr 2026 |
| 8 | AI employees that take on real work, starting with sales | 342 | +75% | +4,786% | 2 | $46.1M | Series A$25M, Apr 2025 |
| 9 | The AI operating system for commodity operations | 12 | +71% | +71% | YC | $500K | Undisclosed round$500K, Jan 2026 |
| 10 | Modern OS for the financial back office. | 37 | +61% | +185% | 9 | $20M | Series A$15.5M, May 2026 |
| 11 | AI code review agent with complete context of your codebase | 45 | +61% | +125% | 16 | $80.3M | Series B$50M, Aug 2026 |
| 12 | The complete agentic document platform | 99 | +60% | +175% | 14 | $108M | Series B$75M, Oct 2025 |
| 13 | Sentry for AI Agents | 19 | +58% | +138% | 2 | $15M | Series A$15M, Sep 2026 |
| 14 | Accelerate Medication Access with AI | 20 | +54% | +150% | 14 | Undisclosed roundApr 2024 | |
| 15 | Supersonics for the new Jet Age | 71 | +51% | +137% | 45 | $27.6M | Series B$27.1M, Jul 2026 |
| 16 | The AI for Financial Services. | 263 | +49% | +217% | 5 | $87.5M | Undisclosed round$75M, Aug 2026 |
| 17 | Earn airline miles on hotels and everyday spend. | 58 | +49% | +38% | 1 | Undisclosed roundJan 2026 | |
| 18 | The AI communication layer for healthcare | 31 | +48% | +48% | 1 | $10.5M | Seed$10M, Sep 2026 |
| 19 | Open-source, extensible AI gateway with observability and evals | 22 | +47% | +144% | YC | $5.5M | Seed$5M, Mar 2026 |
| 20 | Marketplace for America's most essential assets | 230 | +46% | +150% | 2 | $22.8M | Series B$17.8M, Sep 2026 |
| 21 | Supercharge Your Contact Center Operations with AI Phone Agents | 196 | +45% | +109% | 20 | $4.7M | Seed$4.6M, Apr 2024 |
| 22 | AI Workforce for the Insurance Industry | 71 | +42% | +209% | 5 | $30M | Series A$25M, Oct 2025 |
| 23 | AI lipsync tool for video content creators | 61 | +42% | +56% | 0 | $6.4M | Grant$250K, Oct 2024 |
| 24 | Business banking for cross-border SMBs & Startups | 28 | +40% | +47% | YC | $1.9M | Pre-seed$1.9M, Apr 2024 |
| 25 | Authoring documents for life sciences in minutes, not months. | 28 | +40% | +211% | 1 | $16.5M | Series A$16M, Apr 2026 |
| 26 | Delightful robots | 14 | +40% | +180% | YC | ||
| 27 | Constellations as a Service | 11 | +38% | +83% | 0 | $4M | Seed$3.5M, May 2024 |
| 28 | Give your voice agents a face | 11 | +38% | +83% | 0 | $10.5M | Seed$10.5M, Dec 2025 |
| 29 | Agentic Marketing Platform | 29 | +32% | +93% | YC | $20.9M | Series A$18.7M, Jun 2026 |
| 30 | AI Inference Platform for Drug Discovery | 21 | +31% | +91% | YC | $13.6M | Series A$13.6M, Feb 2026 |
| 31 | AI-native investment bank for small businesses | 38 | +31% | +58% | YC | $16.8M | Series A$12M, Jul 2025 |
| 32 | Validated mental health support in your pocket, anytime. | 26 | +30% | +53% | YC | SeedMar 2024 | |
| 33 | Tools for AI agents to run marketing for the world's biggest… | 18 | +29% | +125% | YC | $500K | YC investment$500K, Apr 2024 |
| 34 | The multiplayer AI agent builder. Let anyone build, IT controls access | 51 | +28% | +122% | 8 | $70.1M | Series B$50M, Mar 2026 |
| 35 | Autonomous offensive and defensive cybersecurity platform | 33 | +27% | +38% | YC | $6.2M | Seed$3.6M, Jan 2026 |
| 36 | Global neobank for emerging markets | 147 | +27% | +34% | 0 | $1.5M | Undisclosed round$1.5M, Jan 2026 |
| 37 | Data services for finance and operations at PE-backed companies. | 20 | +25% | +54% | YC | $2.7M | Seed$2.2M, Jul 2024 |
| 38 | AI-enabled Surety Bond Broker | 10 | +25% | +67% | 0 | $950K | YC investment$500K, Apr 2024 |
| 39 | The orchestration platform for teams who ship. | 10 | +25% | +100% | 0 | $500K | YC investment$500K, Feb 2024 |
| 40 | Mobile carrier for businesses in Brazil | 53 | +23% | +39% | 0 | $3.3M | Seed$1.9M, May 2024 |
| 41 | AI for risk and compliance | 34 | +21% | +70% | 1 | $3.5M | Seed$3M, Aug 2024 |
| 42 | Enterprise AI customer support | 35 | +21% | +289% | 1 | $9.1M | Seed$7M, Jan 2026 |
| 43 | AI platform for phone-first sellers | 18 | +20% | +100% | YC | $500K | Seed$500K, Jan 2026 |
| 44 | Open source alternative to AWS | 20 | +18% | +18% | YC | $16M | Seed$16M, Mar 2024 |
| 45 | LLM Security and Compliance | 20 | +18% | +33% | YC | $3.2M | Seed$3.2M, Apr 2024 |
| 46 | AI agents for healthcare admin | 22 | +16% | +100% | 10 | $23.5M | Series A$20M, Mar 2026 |
| 47 | Speaking coach for non-native English professionals | 32 | +14% | +14% | 0 | $2.5M | Seed$2M, Jun 2024 |
| 48 | AI Creative Strategist | 24 | +14% | +50% | YC | $2.6M | YC investment$500K, Mar 2024 |
| 49 | AI-powered phone platform for dentists | 17 | +13% | +13% | YC | $3.8M | Seed$3.8M, Oct 2025 |
| 50 | Transparent, AI-powered healthcare TPA. | 20 | +11% | +43% | YC | $2.1M | Seed$2.1M, Jan 2026 |
| 51 | AI for Robot Arms in Factories | 10 | +11% | +25% | YC | $500K | YC investment$500K, Jul 2024 |
| 52 | An AI-powered supply chain compliance engine | 22 | +10% | +69% | YC | $3.8M | Seed$3.3M, Jun 2024 |
| 53 | Foundation Models for the Brain | 11 | +10% | −8% | YC | $8M | Seed$1.5M, Dec 2024 |
| 54 | AI-enabled procurement for government | 12 | +9% | +9% | YC | $2M | Series A$1.5M, Jan 2026 |
| 55 | Card issuer processor and banking stack for businesses in Sub-… | 30 | +7% | +30% | 0 | $500K | YC investment$500K, Jan 2024 |
| 56 | B2B construction marketplace to match contractors and subcontractors. | 15 | +7% | +25% | 0 | $2M | Pre-seed$2M, Mar 2024 |
| 57 | The secondary market for real estate leases | 16 | +7% | +60% | 0 | $6.4M | Undisclosed round$5.9M, Mar 2025 |
| 58 | International Billing Ops, Sales Tax and Payments for SaaS businesses | 18 | +6% | +64% | YC | $500K | YC investment$500K, Feb 2024 |
| 59 | Risotto auto-solves IT support requests using AI | 19 | +6% | +111% | 0 | $10.5M | Seed$10M, Jan 2026 |
| 60 | Building The Next Generation of Night Vision Devices | 19 | +6% | +36% | YC | $6M | Series A$5.5M, Sep 2025 |
| 61 | Alex is the AI recruiter for hiring great people. | 47 | +4% | +31% | 3 | $20.5M | Series A$17M, Sep 2025 |
| 62 | An all-in-one platform for building internal agents & workflows | 26 | +4% | +8% | 0 | $500K | Seed$500K, Jan 2026 |
| 63 | AI Agents for Hospitality | 27 | +4% | +4% | YC | $3.6M | Seed$3.1M, Apr 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
248 companies were in Y Combinator's Winter 2024 batch (W24); 208 are active.
33 companies posted roles in the last 60 days, led by Legora (123 roles), Astro Mechanica (45 roles) and Retell AI (20 roles). 93 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Centralize (+107%), PointOne (+100%) and Zep AI (+100%).
Largest latest rounds in the last 12 months, after their YC batch: Model ML ($75M), Blacksmith ($66M) and Legora ($50M).