The 33 YC S18 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 | Titan is an award-winning wealth manager with a mission to increase… | 75 | +53% | +103% | 4 | $73M | Undisclosed round$58M, Jan 2023 |
| 2 | AI-enabled ordering for medical equipment & supplies | 246 | +29% | +64% | 4 | $3M | Seed$3M, Mar 2021 |
| 3 | Building Clinical Superintelligence. | 541 | +20% | +54% | YC | $29.1M | Undisclosed round$7.9M, Apr 2024 |
| 4 | Autonomous drones to help warehouses scan inventory. | 46 | +15% | +21% | 0 | $46M | Undisclosed round$20M, Aug 2026 |
| 5 | Lending Intelligence Software | 103 | +14% | +41% | 3 | $12.1M | Series A$12M, Jul 2021 |
| 6 | Trends prediction for marketers | 33 | +14% | +22% | 2 | $1.8M | Seed$1.8M, Jun 2019 |
| 7 | The space infrastructure services company | 67 | +14% | +24% | 0 | $237M | Post-IPO equity$25M, Jun 2026 |
| 8 | Build and grow your app business | 185 | +13% | +41% | 9 | $119M | Series C$50M, May 2025 |
| 9 | Rebellyous Foods is a food manufacturing technology and production… | 18 | +13% | +6% | 0 | $43.5M | Series B$2.4M, Jan 2025 |
| 10 | We at Leena AI build a virtual assistant that answers employee's… | 327 | +11% | +25% | 20 | $41M | Undisclosed round$1M, Oct 2026 |
| 11 | Building a world where alternative proteins are no longer alternative. | 548 | +11% | +18% | 0 | GrantAug 2018 | |
| 12 | Your AI agent for creating anything customer-facing, in minutes. | 52 | +8% | −4% | 3 | $71.6M | Series B$50M, Apr 2022 |
| 13 | AIoT monitoring, workflow, and evidence systems for regulated labs. | 26 | +8% | +8% | 0 | $120K | Seed$120K, Jul 2019 |
| 14 | Your AI-powered creative apprentice 🪄 | 14 | +8% | 0 | $3.1M | Seed$3.1M, Feb 2022 | |
| 15 | Making low cost versions of high cost generic drugs. | 144 | +7% | +19% | 12 | SeedJan 2018 | |
| 16 | Manage your ledgers and avail Financial Services like Lending on your… | 893 | +7% | +12% | 0 | $187M | Series C$100M, Aug 2021 |
| 17 | Fermentation-derived natural products to solve health problems | 15 | +7% | +7% | 0 | $7.6M | Undisclosed round$7.5M, Oct 2022 |
| 18 | AI Document Fraud Detection for Banks, Credit Unions & Lenders | 46 | +7% | +7% | 2 | $38.7M | Series B$25M, Jan 2023 |
| 19 | Modernizing the hospitality tech stack. | 401 | +7% | +35% | 33 | $177M | Series D$80M, Jun 2025 |
| 20 | Shopify for experiences | 65 | +7% | −2% | 1 | $59.6M | Series A$10M, Oct 2026 |
| 21 | Robotic human cell manufacturing | 49 | +7% | 4 | $20.8M | Series A$19M, Nov 2023 | |
| 22 | Wealth manager | 149 | +6% | +17% | 12 | $59.1M | Undisclosed round$4.2M, Feb 2024 |
| 23 | Connecting Survivors to Careers in Tech | 62 | +5% | 0 | $270K | Grant$150K, Sep 2026 | |
| 24 | Enabling next generation medicines. A comprehensive platform and… | 21 | +5% | −5% | 0 | $59.5M | Series A$55M, Jan 2022 |
| 25 | Simple and secure bookkeeping for Indian businesses. | 146 | +4% | +7% | 0 | $84.2M | Non-equity support$67M, Aug 2021 |
| 26 | Payment operations tools for money movement. | 127 | +4% | −15% | YC | $183M | Series C$50M, Mar 2022 |
| 27 | Honeylove makes functional undergarments for women | 120 | +3% | +8% | 0 | $16M | Series A$13M, Sep 2019 |
| 28 | Skills-based talent management solutions for a dynamic workforce. | 65 | +3% | +20% | YC | $2M | Seed$2M, Dec 2022 |
| 29 | One-stop-shop for flexible family care | 1,078 | +3% | +8% | 1 | $241M | Series D$150M, Nov 2021 |
| 30 | Learning Hub for companies in Latam | 235 | +3% | −7% | 0 | $34.9M | Series B$25M, Jan 2022 |
| 31 | Consumer fintech for Indonesia | 939 | +2% | +15% | 23 | $515M | Series C$270M, Aug 2026 |
| 32 | Logistic Management System for E-commerce & Retail in Mexico. | 534 | +2% | +8% | 36 | $27M | Series B$20M, Aug 2022 |
| 33 | An online provider for greater mental health | 143 | +1% | +6% | YC | $53.3M | Grant$2M, May 2022 |
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
131 companies were in Y Combinator's Summer 2018 batch (S18); 77 are active.
22 companies posted roles in the last 60 days, led by SkydropX (36 roles), Canary Technologies (33 roles) and Ajaib (23 roles). 28 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Titan (+53%), Verse Medical (+29%) and Eden (+20%).
Largest latest rounds in the last 12 months, after their YC batch: Ajaib ($270M), Within ($70M) and Corvus Robotics ($20M).