The 100 Y Combinator companies whose latest reported round, after their YC batch and in the last 12 months, was the largest.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| # | Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|---|
| 1 | Seamless mobility to, through, and from space. It starts with 100%… | W21 | 451 | +17% | +33% | 4 | $2.4B | Series E$1B, Sep 2026 |
| 2 | Whatnot is the largest livestream shopping platform in the U.S. | W20 | 2,223 | +13% | +35% | 9 | $1.5B | Series G$547M, Aug 2026 |
| 3 | Building the world's first fusion power plant | S14 | 594 | +11% | +34% | 49 | $1.5B | Series G$500M, Jun 2026 |
| 4 | Collaborative in-browser IDE | W18 | 738 | 10 | $873M | Corporate round$400M, May 2026 | ||
| 5 | Economically and environmentally sustainable supersonic travel | W16 | 365 | +10% | +22% | 14 | $732M | Undisclosed round$300M, Dec 2025 |
| 6 | Consumer fintech for Indonesia | S18 | 939 | +2% | +15% | 23 | $515M | Series C$270M, Aug 2026 |
| 7 | Helping businesses make and accept payments from anywhere in Africa. | S16 | 893 | +3% | −1% | 0 | $476M | Undisclosed round$250M, Jul 2026 |
| 8 | Web search rebuilt for LLMs | S21 | 243 | +46% | +117% | 28 | $357M | Series C$250M, May 2026 |
| 9 | Data centers in space | S24 | 66 | +57% | +128% | YC | $444M | Series A$250M, Aug 2026 |
| 10 | The first public safety operating system that eliminates crime. | S17 | 1,446 | +1% | +6% | 32 | $1.2B | Series I$200M, Apr 2026 |
| 11 | Bluetooth to Space | W22 | 88 | +16% | +31% | 2 | $291M | Series C$200M, Sep 2026 |
| 12 | RADAR is building technology to completely transform the in-store… | W13 | 241 | +10% | +23% | 4 | $310M | Series B$170M, May 2026 |
| 13 | The leading Composable CDP and AI Decisioning platform | S19 | 658 | +14% | +51% | 52 | $332M | Series D$150M, Apr 2026 |
| 14 | Build in a weekend. Scale to millions. | S20 | 484 | +38% | +106% | 0 | $1.2B | Series F$150M, Oct 2026 |
| 15 | Intelligence that runs your operations. | S23 | 260 | +83% | +192% | 36 | $211M | Series C$150M, Aug 2026 |
| 16 | Building foundational AI for speech transcription and understanding. | W16 | 387 | +23% | +64% | 42 | $216M | Series C$130M, Aug 2026 |
| 17 | Transform your decision-making with reliable AI agents in weeks, not… | S20 | 237 | +11% | +22% | 2 | $209M | Series C$130M, Jun 2026 |
| 18 | AI app builder that turns your ideas into monetizable software. | S24 | 410 | +34% | +193% | 33 | $230M | Series C$130M, Jul 2026 |
| 19 | AI + Robotics for the Built World | W16 | 318 | +2% | −5% | 11 | $347M | Undisclosed round$125M, Aug 2026 |
| 20 | AI-powered Sales Agent for Service-Based Industries | W23 | 270 | +38% | +108% | 6 | $126M | Series B$125M, Apr 2026 |
| 21 | The autonomous revenue cycle management platform. | W20 | 243 | +19% | +45% | 2 | $220M | Series D$120M, Jul 2026 |
| 22 | Self-Driving Customer Care | W16 | 310 | +16% | +34% | 14 | $217M | Series C$110M, Apr 2026 |
| 23 | International banking infrastructure for global startups. | S20 | 324 | +5% | +13% | 3 | $653M | Series C$110M, Sep 2026 |
| 24 | quantum-accelerated AI servers | X25 | 48 | +50% | +118% | 8 | $139M | Series A$105M, Mar 2026 |
| 25 | Telehealth dietitians covered by insurance | W21 | 4,256 | 7 | $213M | Series C$100M, May 2026 | ||
| 26 | Banking, corporate cards, stablecoin payments, available globally. | S21 | 98 | +31% | +63% | 3 | $160M | Series C$100M, Apr 2026 |
| 27 | The AI-native sales tax solution. | W23 | 173 | +25% | +63% | 2 | $158M | Series C$100M, Sep 2026 |
| 28 | Our operations software makes it easier to run--and grow--your cafe | S19 | 221 | +3% | +11% | 21 | $352M | Undisclosed round$96M, Aug 2026 |
| 29 | We grow cells for biotech companies. | W18 | 63 | −19% | −18% | 1 | $102M | Series C$80M, Dec 2025 |
| 30 | AI Agents for Recruiting | S22 | 158 | +70% | +187% | 33 | $116M | Series B$80M, Mar 2026 |
| 31 | Medical language models to automate healthcare operations | W23 | 137 | +47% | +198% | 24 | $93.5M | Series A$80M, Mar 2026 |
| 32 | Building and Protecting an Exciting Future | S23 | 62 | 0 | $80M | Series A$80M, Jul 2026 | ||
| 33 | All-in-one app for internal communication and HR | W22 | 752 | +22% | +79% | 1 | $77.5M | Series A$77.5M, Feb 2026 |
| 34 | Robotic production capacity for the pharma manufacturing industry | S16 | 76 | +7% | +31% | 10 | $97.7M | Series B$75M, Oct 2026 |
| 35 | Vertical AI for Audit & Advisory Firms | S20 | 257 | +24% | +58% | 6 | $125M | Series C$75M, Feb 2026 |
| 36 | Moving Things Around in Space, Imaging Space Objects When We're Not | S21 | 211 | 2 | $128M | Series B$75M, Apr 2026 | ||
| 37 | America's #1 Sports Trading App | S22 | 98 | +72% | +165% | 9 | $99.9M | Series B$75M, Feb 2026 |
| 38 | Building the library for superintelligence. | S22 | 62 | +35% | +63% | 16 | $89.5M | Series B$75M, Sep 2026 |
| 39 | AI-native operations for the banks | S23 | 107 | +16% | +47% | 1 | $95.3M | Series B$75M, Feb 2026 |
| 40 | The AI for Financial Services. | W24 | 263 | +49% | +217% | 5 | $87.5M | Undisclosed round$75M, Aug 2026 |
| 41 | Company Brain for people and agents to work in harmony. | S18 | 77 | −57% | −57% | 11 | $90.4M | Undisclosed round$70M, Sep 2026 |
| 42 | TRM is building a safer world for billions of people. | S19 | 481 | +14% | +36% | 67 | $220M | Series C$70M, Sep 2026 |
| 43 | The fastest way to run your GitHub Actions | W24 | 65 | 9 | $125M | Series C$66M, Oct 2026 | ||
| 44 | Get up and running with large language models. | W21 | 77 | +38% | +64% | 0 | $80.1M | Series B$65M, Jul 2026 |
| 45 | Corgi is building an AI financial infrastructure company | S24 | 402 | +88% | +272% | 16 | $439M | Series B$64M, Sep 2026 |
| 46 | Gilgamesh Pharmaceuticals, a Clinical stage biotechnology company… | S20 | 37 | +3% | +3% | 0 | $143M | Series A$60M, Mar 2026 |
| 47 | The data layer for physical AI | W21 | 231 | +31% | +75% | 3 | $110M | Series C$60M, Feb 2026 |
| 48 | AI-native Employee Management Platform for High-Growth Companies | W23 | 87 | +61% | +200% | 11 | $85M | Series B$60M, Jun 2026 |
| 49 | Protecting the grid today, preparing the grid for tomorrow | W21 | 221 | +18% | +51% | 1 | $97.2M | Series B$55M, Nov 2025 |
| 50 | AI-enabled financial automation and intelligence for CPG Brands | S21 | 121 | +89% | +163% | 22 | $75M | Series B$55M, Sep 2026 |
| 51 | Online Training for Healthcare Jobs | S21 | 449 | +12% | +33% | 36 | $111M | Series C$55M, Jun 2026 |
| 52 | Construction's AI Platform | W22 | 175 | +40% | +84% | 4 | $90.5M | Series B$54M, Dec 2025 |
| 53 | Fair, simple and accessible financial services | S21 | 480 | +4% | +15% | 2 | $86.8M | Corporate round$53M, May 2026 |
| 54 | Medical device that provides a more effective, less invasive… | W15 | 48 | +12% | +41% | 1 | $134M | Series D$52M, Oct 2026 |
| 55 | AI-powered technology enabler and digital transformer of American… | W15 | 129 | +7% | +11% | 0 | $599M | Series H$50M, Feb 2026 |
| 56 | The sleep fitness company. | S15 | 282 | +17% | +26% | 16 | $302M | Series D$50M, Mar 2026 |
| 57 | Household needs, from bread to everything. | S19 | 2,667 | +7% | +21% | 0 | $89M | Series C$50M, Feb 2026 |
| 58 | Voice AI for developers. | W21 | 150 | +50% | +114% | 4 | $70.6M | Series B$50M, May 2026 |
| 59 | The enterprise platform for AI phone calls | S23 | 123 | +4% | +38% | 5 | $106M | Series C$50M, Jun 2026 |
| 60 | The multiplayer AI agent builder. Let anyone build, IT controls access | W24 | 51 | +28% | +122% | 8 | $70.1M | Series B$50M, Mar 2026 |
| 61 | The agentic operating system for legal work | W24 | 980 | +81% | +321% | 123 | $866M | Series D$50M, Apr 2026 |
| 62 | AI code review agent with complete context of your codebase | W24 | 45 | +61% | +125% | 16 | $80.3M | Series B$50M, Aug 2026 |
| 63 | Practical, general-purpose robots for repetitive industrial tasks | S24 | 38 | +100% | +192% | YC | $62M | Series A$50M, Oct 2026 |
| 64 | Growth through always‑on consumer understanding | S24 | 103 | +54% | +472% | 9 | $55.8M | Series A$50M, Sep 2026 |
| 65 | We build the AI companion for nurses, to create time for care. | W22 | 192 | +42% | +109% | 11 | $59.3M | Series A$49.8M, Nov 2025 |
| 66 | AI-native commercial insurance brokerage | W25 | 85 | +35% | +158% | 14 | $47.5M | Series A$47M, Feb 2026 |
| 67 | Expo brings together the best of web and native app development | S16 | 205 | +17% | +41% | 0 | $45.1M | Series B$45M, Apr 2026 |
| 68 | The intelligent documentation platform | W22 | 85 | +29% | +81% | 12 | $66.7M | Series B$45M, Apr 2026 |
| 69 | Making all ships robots. | W22 | 40 | +5% | +33% | 3 | $58.5M | Series A$43M, Jan 2026 |
| 70 | Modernizing commercial insurance | W21 | 107 | +11% | +43% | 17 | $61.6M | Series B$42M, Mar 2026 |
| 71 | Infrastructure to protect companies from AI abuse | W22 | 60 | +54% | +107% | 4 | $55M | Series B$41M, May 2026 |
| 72 | Connecting stakeholders across the healthcare ecosystem. | W20 | 585 | +8% | +12% | 22 | $234M | Series D$40M, May 2026 |
| 73 | Pre-tax and lifestyle benefits, managed in one place. | W20 | 135 | +25% | +67% | 7 | $74.7M | Series B$40M, Jan 2026 |
| 74 | all-in-one operating system (OS) for telcos | W21 | 121 | +34% | +51% | 8 | $66.3M | Series B$40M, Mar 2026 |
| 75 | Internet for the urban developing world. | W21 | 382 | +18% | +41% | 0 | $75.6M | Series B$40M, Mar 2026 |
| 76 | Payments powering people | S21 | 68 | −1% | +8% | 5 | $62M | Series B$40M, Jun 2026 |
| 77 | Building the human layer of AI | S21 | 104 | +4% | +33% | 8 | $64.2M | Series B$40M, Nov 2025 |
| 78 | We're building fully automated labs for protein engineering | S21 | 40 | +29% | +43% | YC | $50.9M | Series A$40M, Aug 2026 |
| 79 | Spade is the data and AI platform for modern finance. | W22 | 46 | +39% | +77% | 6 | $57.2M | Series B$40M, Mar 2026 |
| 80 | AI patent drafting, prosecution, litigation and more for legal teams. | S23 | 72 | +33% | +125% | 3 | $55M | Series B$40M, Dec 2025 |
| 81 | End-to-end content, learning, & deal intelligence for B2B sales teams | S23 | 68 | +45% | +183% | YC | $55M | Series B$40M, Feb 2026 |
| 82 | AI that makes AI fast | S25 | 18 | +200% | 2 | $44.8M | Series A$40M, Sep 2026 | |
| 83 | Luminai is the AI platform for Health System Operations. | S20 | 69 | +25% | +50% | 4 | $57.8M | Series B$38M, Apr 2026 |
| 84 | Altay develops disease-modifying therapies targeting transcription… | W20 | 7 | +17% | +40% | 0 | $40.2M | Series A$37M, Oct 2026 |
| 85 | Glimpse is the system of action for CPG retail operations | S20 | 70 | +37% | +75% | 3 | $53.4M | Series A$35M, Mar 2026 |
| 86 | Turning everyday words and actions into usable training data. | W26 | 100 | −5% | +488% | 0 | $31.7M | Seed$31.2M, May 2026 |
| 87 | AI for corporate tax | W23 | 106 | +49% | +74% | 1 | $43.5M | Series B$31M, Feb 2026 |
| 88 | Transforming how health systems optimize labor | W23 | 74 | +19% | +85% | 12 | $31M | Series A$31M, Oct 2026 |
| 89 | 1st federally regulated exchange where people can trade on events | W19 | 604 | +17% | +83% | YC | $2.9B | Undisclosed round$30M, Jul 2026 |
| 90 | Natural hydrogel to keep internal organs scar-free after surgery | W22 | 25 | +47% | +178% | 0 | $32.3M | Series A$30M, Jul 2026 |
| 91 | AI platform to win and run government contracts | W22 | 72 | +14% | +47% | YC | $40M | Series B$30M, Jan 2026 |
| 92 | AI Phone Agents for Healthcare Operations | S23 | 70 | +100% | +400% | 4 | $35M | Series A$30M, Jun 2026 |
| 93 | The World's First Multi-Agent System for Procurement | S23 | 149 | +22% | +192% | 6 | $30M | Series A$30M, Mar 2026 |
| 94 | AI-powered user interviews | S23 | 113 | +43% | +232% | 25 | $51.3M | Series B$30M, Dec 2025 |
| 95 | Applied research lab curating data solutions for foundation model… | W25 | 286 | +58% | +186% | 25 | $30.5M | Series B$30M, Sep 2026 |
| 96 | Data and RL environments to automate knowledge work | S25 | 55 | 2 | $30.5M | Series A$30M, Oct 2026 | ||
| 97 | Making AI run fast on any hardware. | S25 | 13 | +18% | +44% | YC | $35M | Undisclosed round$29.2M, Oct 2026 |
| 98 | Enabling better self care with at-home hormone tracking. | W19 | 264 | +6% | +10% | YC | $57.5M | Series B$29M, Dec 2025 |
| 99 | Autonomous Company Infrastructure | X25 | 15 | +150% | +200% | 3 | $28.5M | Series A$28.5M, Aug 2026 |
| 100 | On-Demand Electronics Manufacturing | W12 | 66 | +14% | +32% | 8 | $46.4M | Series A$28M, May 2026 |
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
YC's public directory lists 6,376 launched companies across 50 batches since 2005: 4,406 active, 839 acquired, 23 public and 1,108 listed as inactive.
The newest batch with companies in the directory is Fall 2026 (219 companies). YC has also started listing Summer 2027 (1) and Winter 2027 (9). YC runs four batches a year: Winter, Spring, Summer and Fall.
By people listing them as their employer on public profiles (which can include contractors, drivers and hosts): DoorDash (84,144), Instacart (25,483), Stripe (16,694), Rappi (15,009) and Deel (9,642). 23 YC companies are public and 839 were acquired. Sort the table by Largest team to see the rest.
We found job postings in the last 60 days for 719 YC companies, led by Stripe (659 roles), EquipmentShare (262 roles) and Relativity Space (244 roles); another 1,017 say they are hiring on YC's directory. See YC companies hiring the most, or filter by Hiring for (engineering, sales and more). We count distinct role titles, because the same job is often posted on several job boards.
Ranked by team growth over the last 6 months, among active companies with 10 or more people: Human Archive (+579%), Freya (+355%) and Linewise (+331%). See the fastest growing YC companies, or open any batch and pick Fastest growing.
Team is the number of people who list the company as their current employer on public professional profiles, counted by Crustdata every month. It can differ from a company's own number (contractors, people who have not updated their profile). The 6 and 12 month changes compare that count with the same count back then, and we only show a change when the team had at least 5 people at the start.
1,108 companies are listed as inactive in YC's directory, which usually means they shut down or stopped operating. Filter the table by Status, Inactive to see them. YC does not publish why a company became inactive, and some inactive companies were acqui-hired.
Use Export CSV above the table. It downloads whatever you are looking at (a batch, a list, your filters and search) with domain, batch, status, team size and change, open roles, funding, investors and founders with their profile links. It asks for your email once; we never send anything to it.
The list of companies, batches, industries and locations comes from Y Combinator's public directory, via the open yc-oss dataset. Team size and growth, open roles, funding and founders come from the Crustdata API, which tracks 60M+ companies and 1B+ public professional profiles, and job postings. Each company is matched by its website and its name; 945 companies have no Crustdata record yet and show YC's data only. Funding is reported funding (including debt in the total) and can be incomplete.
Every week. The last update was on November 9, 2026. Founders are refreshed monthly. New companies appear the week YC adds them to its directory.