The 56 YC S20 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 | Build in a weekend. Scale to millions. | 484 | +38% | +106% | 0 | $1.2B | Series F$150M, Oct 2026 |
| 2 | Glimpse is the system of action for CPG retail operations | 70 | +37% | +75% | 3 | $53.4M | Series A$35M, Mar 2026 |
| 3 | AI-native Robotics | 27 | +29% | +35% | YC | Corporate roundAug 2026 | |
| 4 | Take control of your data in real-time. | 91 | +28% | +102% | 1 | $6.8M | Seed$6.8M, Dec 2023 |
| 5 | Luminai is the AI platform for Health System Operations. | 69 | +25% | +50% | 4 | $57.8M | Series B$38M, Apr 2026 |
| 6 | The spot market for semiconductors | 15 | +25% | +36% | 0 | $3.8M | Seed$3M, Dec 2025 |
| 7 | The first test designed to prevent birth control side effects | 10 | +25% | +43% | YC | $2.6M | Seed$2.5M, Apr 2021 |
| 8 | Vertical AI for Audit & Advisory Firms | 257 | +24% | +58% | 6 | $125M | Series C$75M, Feb 2026 |
| 9 | Clinically-validated ingredients from natural microbes | 32 | +23% | +23% | 3 | $26.4M | Series A$25M, Oct 2021 |
| 10 | We use AI to design antibodies for intractable diseases | 28 | +22% | +40% | 1 | $37.4M | Series A$26M, May 2024 |
| 11 | Automating manual and repetitive data engineering tasks with AI | 36 | +20% | +3% | 4 | $26.2M | Undisclosed round$4M, May 2025 |
| 12 | Securing Nurses for Your Future | 73 | +20% | +35% | YC | SeedNov 2022 | |
| 13 | All-in-one workspace for companies making regulated products | 124 | +19% | +57% | YC | ||
| 14 | The open source Looker alternative | 33 | +18% | +38% | 1 | $19.4M | Series A$11M, Oct 2024 |
| 15 | All-in-one platform for creators to sell courses and subscriptions | 122 | +16% | +33% | 1 | $12.9M | Series A$10.8M, Nov 2021 |
| 16 | 🖼️ Give your software the sense of sight. | 154 | +15% | +57% | 7 | $62.2M | Series B$40M, Nov 2024 |
| 17 | Ensuring AI delivers what people need, when and where they need it,… | 71 | +15% | +16% | 2 | $15.7M | Undisclosed round$10.5M, Jul 2024 |
| 18 | Accounting, Payments & Credit app for 60M micro-businesses in… | 367 | +14% | +31% | 0 | $80M | Series A$60M, Jun 2021 |
| 19 | The tolling industry’s prime tech infrastructure | 34 | +13% | +17% | 4 | Undisclosed roundDec 2024 | |
| 20 | The future of B2B spend | 1,421 | +13% | +38% | 3 | $371M | Series D$190M, Oct 2024 |
| 21 | Underwriting automation for small business finance | 65 | +12% | +35% | 1 | $17.8M | Series A$16.6M, Jul 2025 |
| 22 | GPT Search & Merchandising for fashion e-commerce | 28 | +12% | +17% | 0 | $37M | Series A$17M, Feb 2022 |
| 23 | Platform for breakthrough mental health research and treatment | 78 | +11% | +30% | 1 | $57.2M | Series B$40M, May 2022 |
| 24 | Everything for your fitness or wellness business. | 111 | +11% | +18% | YC | $22.7M | Series A$15M, Jun 2025 |
| 25 | At-Home health monitoring with silicon photonic chips for data centers | 81 | +11% | +31% | 1 | $32.8M | Series A$17M, Mar 2025 |
| 26 | Transform your decision-making with reliable AI agents in weeks, not… | 237 | +11% | +22% | 2 | $209M | Series C$130M, Jun 2026 |
| 27 | Modernizing global transportation payments. | 187 | +10% | +4% | YC | $312M | Series C$130M, Sep 2024 |
| 28 | The CRM powering iconic musicians and events | 33 | +10% | +14% | YC | $7.5M | Corporate round$3M, Oct 2022 |
| 29 | India's Largest EV charging network | 328 | +10% | +13% | 1 | $46.1M | Undisclosed round$18M, Feb 2026 |
| 30 | Helping Plastic Surgeons Rebuild Fat | 12 | +9% | +9% | 0 | $8M | Seed$2.7M, Oct 2025 |
| 31 | India's leading on-demand diagnostics company | 728 | +8% | +8% | 1 | $70.8M | Series C$23.8M, Jun 2026 |
| 32 | Data platform for mission-critical real-time workloads | 30 | +7% | +7% | YC | $14.3M | Non-equity support$12M, Apr 2024 |
| 33 | The all-in-one screen recorder. | 15 | +7% | +15% | 0 | $2.2M | Seed$2.1M, Apr 2025 |
| 34 | We make unmakeable proteins with radical advanced biomanufacturing. | 47 | +7% | +18% | 0 | $26.9M | Series A$8M, Jun 2025 |
| 35 | Bits is a credit card designed to help people build credit | 50 | +6% | 1 | $258K | YC investment$125K, Aug 2020 | |
| 36 | Plan, communicate, and benchmark your compensation in real-time. | 304 | +6% | +13% | YC | $163M | Series C$100M, Jun 2022 |
| 37 | Easiest way to deploy on AWS/GCP/Azure | 53 | +6% | +23% | YC | $26.6M | Series A$20M, Jan 2026 |
| 38 | Business-in-a-Box™ for LLCs | 100 | +5% | +10% | 3 | $11M | Series A$8M, Mar 2024 |
| 39 | Kernal is creating mRNA 2.0 therapies that work in specific cells | 21 | +5% | +40% | 3 | $73M | Grant$48M, Oct 2025 |
| 40 | International banking infrastructure for global startups. | 324 | +5% | +13% | 3 | $653M | Series C$110M, Sep 2026 |
| 41 | API that lets companies embed investment accounts into their services | 49 | +4% | +14% | 11 | $55.1M | Undisclosed round$30M, Aug 2025 |
| 42 | We deliver personalized medicine for neurodegenerative patients | 105 | +4% | +14% | 1 | $78.2M | Series A$25M, Nov 2024 |
| 43 | Agentic AI CRM for ecommerce | 353 | +3% | +8% | 1 | $12.8M | Undisclosed round$10.8M, Apr 2022 |
| 44 | Absorbable wrap for blood vessels | 34 | +3% | 0 | $29.8M | Series A$4M, Jun 2024 | |
| 45 | Investment platform for MENA individuals | 309 | +3% | +11% | 18 | $37M | Undisclosed round$15.7M, May 2025 |
| 46 | Deliver effective learning at scale | 73 | +3% | +20% | 0 | $30.2M | Undisclosed round$14.1M, Jul 2026 |
| 47 | Gilgamesh Pharmaceuticals, a Clinical stage biotechnology company… | 37 | +3% | +3% | 0 | $143M | Series A$60M, Mar 2026 |
| 48 | Save money and win prizes up to $10m through weekly number draws. | 38 | +3% | −5% | 0 | $26.6M | Undisclosed round$10M, Feb 2022 |
| 49 | Finch is the Employment Data Platform | 157 | +3% | +10% | 1 | $62.1M | Undisclosed round$3.5M, Jun 2023 |
| 50 | India's fastest medicine delivery in just 30 minutes | 62 | +2% | −2% | 0 | $3.1M | Seed$1.6M, Jun 2025 |
| 51 | The first digital payment experience company, built for B2B. | 149 | +1% | +6% | 1 | $437M | Debt$350M, Nov 2022 |
| 52 | Power commerce photography with generative AI | 699 | +1% | +11% | 3 | $62.1M | Series B$43M, Feb 2024 |
| 53 | We train AI engineers and connect them with companies. | 877 | +1% | +2% | 0 | $11.8M | Series A$10M, May 2022 |
| 54 | Home Inspections, Simplified | 82 | +1% | +4% | 2 | $22.5M | Undisclosed round$5.3M, Oct 2024 |
| 55 | API Platform for Banking Integrations (Plaid for India and APAC) | 106 | +1% | +5% | 0 | $8.2M | Series B$3.5M, Jun 2025 |
| 56 | Zuddl is a modular platform for events and webinars that helps event… | 121 | +1% | −5% | YC | $15.3M | Series A$13.3M, Jan 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
209 companies were in Y Combinator's Summer 2020 batch (S20); 122 are active.
39 companies posted roles in the last 60 days, led by Thndr (18 roles), Atomic (11 roles) and Roboflow (7 roles). 52 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Supabase (+38%), Glimpse (+37%) and Nextera Robotics | DIDGE.ai (+29%).
Largest latest rounds in the last 12 months, after their YC batch: Supabase ($150M), Taktile ($130M) and Jeeves ($110M).