The 62 YC S24 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 | Renewable infrastructure deployment at scale. | 12 | +140% | 0 | $4.4M | Seed$3.9M, Apr 2026 | |
| 2 | AI-native medical record retrieval | 63 | +103% | +385% | 3 | $500K | YC investment$500K, Jan 2026 |
| 3 | Practical, general-purpose robots for repetitive industrial tasks | 38 | +100% | +192% | YC | $62M | Series A$50M, Oct 2026 |
| 4 | Look inside the model | 25 | +92% | +257% | 0 | $500K | YC investment$500K, Jan 2026 |
| 5 | Corgi is building an AI financial infrastructure company | 402 | +88% | +272% | 16 | $439M | Series B$64M, Sep 2026 |
| 6 | Invest in Global Equities from India | 24 | +85% | +167% | 0 | $500K | YC investment$500K, Sep 2024 |
| 7 | AI agent for Accounts Receivable | 44 | +76% | +389% | 2 | $21.7M | Undisclosed round$17M, Aug 2026 |
| 8 | AI voice that sells | 33 | +65% | +313% | 12 | $14.5M | Seed$14M, Feb 2026 |
| 9 | AI-native HOA Management Company | 13 | +63% | +44% | YC | Undisclosed roundSep 2024 | |
| 10 | AI call centers | 47 | +62% | +135% | 4 | $16.5M | Series A$16M, Apr 2026 |
| 11 | AI employee for consumer lending | 19 | +58% | +111% | 8 | $24.5M | Series A$24M, Sep 2026 |
| 12 | Data centers in space | 66 | +57% | +128% | YC | $444M | Series A$250M, Aug 2026 |
| 13 | AI agents that handle communications for clinics | 11 | +57% | +57% | YC | $500K | YC investment$500K, Sep 2024 |
| 14 | autarc is the agentic OS for energy installers. | 75 | +56% | +92% | 1 | $9.4M | Undisclosed round$8.8M, Dec 2024 |
| 15 | Worldwide exam-prep platform | 25 | +56% | +79% | 1 | $500K | YC investment$500K, Jan 2025 |
| 16 | Growth through always‑on consumer understanding | 103 | +54% | +472% | 9 | $55.8M | Series A$50M, Sep 2026 |
| 17 | Custom Parts, Manufactured in America 🇺🇸 | 12 | +50% | +140% | 1 | $500K | YC investment$500K, Jul 2025 |
| 18 | Automate security and privacy reviews | 25 | +47% | +67% | 2 | $13.4M | Seed$8.4M, Feb 2026 |
| 19 | The autonomous data engineer for the mid-market | 16 | +45% | +129% | 5 | $6.3M | Seed$5.8M, Sep 2026 |
| 20 | Automatically find and fix your software vulnerabilities | 13 | +44% | +86% | 0 | $5.5M | Seed$5M, Sep 2025 |
| 21 | Automating airport baggage handling with robots. | 10 | +43% | +67% | YC | $4M | Seed$3.5M, Apr 2025 |
| 22 | Find & resolve issues in data center engineering & operations using AI | 14 | +40% | +100% | 2 | $500K | Undisclosed round$500K, Jul 2026 |
| 23 | Automate circuit board design using AI | 14 | +40% | +75% | YC | $11.9M | Series A$11.4M, Jul 2025 |
| 24 | Applied AI for workforce operations | 47 | +38% | +104% | 4 | $5.5M | Seed$5M, Feb 2025 |
| 25 | Autonomous Accounting Software | 15 | +36% | +67% | YC | $4.7M | YC investment$500K, Oct 2024 |
| 26 | AI app builder that turns your ideas into monetizable software. | 410 | +34% | +193% | 33 | $230M | Series C$130M, Jul 2026 |
| 27 | AI Supply Chain Manager for CPG | 12 | +33% | +20% | 0 | $500K | YC investment$500K, Dec 2024 |
| 28 | The organic growth engine for financial advisors | 41 | +32% | +173% | 3 | $21.8M | Series A$17M, Dec 2025 |
| 29 | Production-grade unstructured document extraction | 46 | +31% | +53% | 2 | $4.4M | Seed$3.9M, Feb 2025 |
| 30 | AI Agents for collections | 68 | +28% | +55% | YC | $500K | YC investment$500K, Jan 2025 |
| 31 | GPS Denied Navigation for Drones | 14 | +27% | +40% | YC | $4.8M | Seed$4.3M, Apr 2025 |
| 32 | Practical and delightful home robots | 20 | +25% | +67% | 6 | $500K | YC investment$500K, Sep 2024 |
| 33 | Artificial Intelligence for your medical billing team | 10 | +25% | +11% | 0 | $500K | YC investment$500K, Sep 2024 |
| 34 | Multimodal AI agents for video | 10 | +25% | +43% | YC | $1.9M | Seed$1.9M, Dec 2024 |
| 35 | Autonomous freight coordination | 26 | +24% | +136% | YC | $2.4M | Seed$2.4M, Oct 2024 |
| 36 | Enzyme design models. | 11 | +22% | +10% | 0 | $500K | YC investment$500K, Jan 2026 |
| 37 | AI Agents for Advisory & Financial Services. | 11 | +22% | +38% | 0 | ||
| 38 | We work on generalizable tools for the next era of biotech. | 11 | +22% | +22% | 4 | $4.5M | Seed$4M, Nov 2024 |
| 39 | Medical search engine built to reason like a clinician. | 34 | +21% | +13% | 1 | $500K | YC investment$500K, Sep 2024 |
| 40 | Legal Agent that delivers finished work | 17 | +21% | +55% | 0 | $500K | YC investment$500K, Jan 2025 |
| 41 | USDC-Smart Neobank for Latinos. | 18 | +20% | +50% | YC | $20.1M | Seed$20M, Sep 2025 |
| 42 | Spur is the validation infrastructure enterprises use to ship at the… | 92 | +19% | +74% | 1 | $5M | Seed$4.5M, Apr 2025 |
| 43 | Self Improving Software | 13 | +18% | +18% | YC | $7.4M | Seed$5.4M, Aug 2025 |
| 44 | Complete QA platform for voice agents | 20 | +18% | +43% | YC | $4.3M | Seed$3.8M, Dec 2024 |
| 45 | Automating Deal Decks for Commercial Real Estate Brokers | 35 | +17% | +106% | 8 | $21.3M | Series A$16.5M, Jul 2026 |
| 46 | AI-native operating system for behavioral health clinics. | 21 | +17% | +40% | YC | $500K | YC investment$500K, Sep 2024 |
| 47 | Next-generation biocides for sustainable agriculture at scale | 15 | +15% | +67% | 0 | $500K | YC investment$500K, Sep 2024 |
| 48 | OS for global e-commerce expansion of brands & manufacturers | 15 | +15% | 0 | $500K | YC investment$500K, Nov 2024 | |
| 49 | Compliance and back office workflows for Wealth Managers. | 76 | +15% | +49% | 1 | $17.7M | Series A$17.2M, Oct 2025 |
| 50 | Faster healthcare payments | 16 | +14% | +23% | YC | $500K | YC investment$500K, Sep 2024 |
| 51 | Simulation & Evaluation that scales voice and chat AI agents | 26 | +13% | +136% | 2 | $31.8M | Series A$28M, Jun 2026 |
| 52 | Apple Care-like warranty program for every retailer | 36 | +13% | +50% | 0 | $2.5M | Seed$2.5M, Sep 2024 |
| 53 | The Enablement Layer for Physical AI | 10 | +11% | +100% | 0 | $750K | Pre-seed$250K, Feb 2025 |
| 54 | Data for biomedical AI | 10 | +11% | +25% | 0 | ||
| 55 | AI for critical banking operations | 22 | +10% | +83% | YC | $3.1M | Seed$3M, Jan 2025 |
| 56 | Foundation models for time series | 12 | +9% | +33% | YC | $500K | YC investment$500K, Jan 2025 |
| 57 | The Memory layer for AI Agents | 26 | +8% | +73% | 2 | $24.4M | Series A$3.9M, Oct 2025 |
| 58 | AI-native office leasing broker | 42 | +8% | +14% | YC | $6.1M | Seed$6.1M, Feb 2025 |
| 59 | Vanta for carbon compliance | 14 | +8% | +40% | YC | $500K | YC investment$500K, Oct 2024 |
| 60 | The GPU sandbox company | 14 | +8% | +56% | YC | $17.6M | Series A$13M, Aug 2026 |
| 61 | Genetically engineered viruses that teach your immune system to kill… | 18 | +6% | +38% | 0 | $9.7M | Seed$9.1M, Jun 2026 |
| 62 | AI tax assistant for professionals and businesses | 52 | +2% | +30% | YC | $5.1M | Seed$4.6M, Feb 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 Summer 2024 batch (S24); 232 are active.
35 companies posted roles in the last 60 days, led by Emergent (33 roles), Corgi (16 roles) and Simple AI (12 roles). 97 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Plume (+140%), Codes Health (+103%) and Ultra (+100%).
Largest latest rounds in the last 12 months, after their YC batch: Starcloud ($250M), Emergent ($130M) and Corgi ($64M).