50 Y Combinator companies with a founder who worked at Stripe before.
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 |
|---|---|---|---|---|---|---|---|
The AI-native sales tax solution. | W23 | 173 | +25% | +63% | 2 | $158M | Series C$100M, Sep 2026 |
Global neobank for emerging markets | W24 | 147 | +27% | +34% | 0 | $1.5M | Undisclosed round$1.5M, Jan 2026 |
Basilica is an API that embeds high-dimensional data like images and… | W19Inactive | 67 | +5% | 0 | Undisclosed roundJan 2021 | ||
Payroll, benefits, state compliance & other bullsh*t for startups | S24Acquired | 62 | −2% | −17% | 0 | $9.1M | Seed$8.6M, Aug 2025 |
API-first banking for ambitious technology companies. | S20 | 32 | +33% | 0 | Undisclosed roundAug 2020 | ||
Digital-native home painting franchise | S23 | 31 | +24% | +19% | 1 | $15M | Seed$11M, Sep 2023 |
The mid-market agent platform | F25 | 27 | +4% | +125% | 1 | $6.3M | Seed$5.8M, Apr 2026 |
The cheapest way to borrow money | S23 | 26 | +73% | +225% | 1 | $500K | Seed$500K, Jun 2026 |
Enabling birth & postpartum doulas to easily accept insurance. | W23 | 21 | +50% | +75% | 0 | SeedJan 2026 | |
AI agents for risk, compliance, and safety | S23 | 20 | −13% | −9% | YC | $32.1M | Series A$27.2M, Apr 2025 |
| W23 | 20 | +25% | +33% | 0 | SeedJan 2025 | ||
AI for Government Contractors | W23 | 20 | +11% | +33% | 2 | $2.5M | Seed$2.5M, Mar 2025 |
AI-native Operating System for Enterprise Ecommerce Companies | S20 | 19 | −5% | +12% | YC | $125K | Seed$125K, Nov 2022 |
Bun is an incredibly fast all-in-one JavaScript toolkit | S19Acquired | 18 | 0% | −31% | 0 | $7M | Seed$7M, Aug 2022 |
Travel planner for researching, organizing, and mapping your trip | W19 | 16 | 0% | +23% | 0 | $1.6M | Seed$1.5M, Sep 2021 |
Enterprise-grade AI support reps for call centers | W25 | 9 | −18% | +80% | YC | $500K | YC investment$500K, Mar 2025 |
AI Digital Workers for Supply Chain | X25 | 8 | −11% | +33% | YC | SeedJun 2025 | |
Attunement turns fragmented behavioral health records into structured… | W24 | 8 | 0 | $500K | YC investment$500K, Apr 2024 | ||
AI to increase payment acceptance and reduce fraud for businesses | W23 | 8 | +33% | +60% | 0 | $500K | YC investment$500K, Apr 2023 |
Crypto Neo-Bank (WhatsApp moment for bank accounts) | W22Acquired | 8 | −56% | −50% | 0 | $4.3M | Seed$4.3M, Mar 2022 |
The cloud platform built for coding agents | F25 | 7 | 0% | 0% | 0 | ||
Your personal investing agent | S25 | 7 | −12% | +17% | 0 | $5.5M | Seed$5M, Apr 2026 |
AI Healthcare Provider Credentialing Software | W25 | 7 | +40% | 1 | $500K | YC investment$500K, Mar 2025 | |
AI-powered meeting notes and automations | W24 | 7 | +17% | +17% | YC | $3M | Seed$2.5M, Nov 2024 |
The AI platform for CRE investment teams | S23 | 6 | +20% | +20% | 0 | SeedSep 2023 | |
Financial OS for Modern Fleets | W25 | 5 | −17% | 0 | $500K | YC investment$500K, Mar 2025 | |
Financial infrastructure for the agent economy | W26 | 4 | 0 | ||||
AI tooling | W24 | 4 | −20% | −33% | 0 | $500K | YC investment$500K, Apr 2024 |
Webflow for the Backend | W23 | 4 | −20% | 0 | $500K | Undisclosed round$500K, Jan 2025 | |
Open source Voice AI | W23Acquired | 4 | 0 | $3.8M | Seed$3.3M, Feb 2024 | ||
Financing education through Income Share Agreements | S19Inactive | 4 | 0 | $107M | Seed$6.3M, Jan 2022 | ||
RWE Generation in minutes | X25 | 3 | 0 | $500K | YC investment$500K, Apr 2025 | ||
Flexible systems for clinical reasoning. | W24Acquired | 3 | −50% | 0 | |||
AI Agent for Billpay platforms to pay invoices with virtual cards | W23 | 3 | 0 | $500K | YC investment$500K, Apr 2023 | ||
Usage Metering, AI & API Monetization | W23Acquired | 3 | 0 | $3M | Seed$3M, Mar 2024 | ||
The E2E testing layer for AI-driven development | S25 | 2 | 0 | $500K | YC investment$500K, Sep 2025 | ||
AI agents for web testing | X25 | 2 | 0 | $500K | YC investment$500K, Jul 2025 | ||
AI that updates your CRM for you | W24 | 2 | YC | $2.7M | Seed$2.2M, Sep 2024 | ||
Your team’s AI powered communication tool | W24Inactive | 2 | 0 | $500K | YC investment$500K, Apr 2024 | ||
Deploy Machine Learning Models with One Command | W23 | 2 | 0 | $500K | YC investment$500K, Apr 2023 | ||
AI browser copilot for teams | W23 | 2 | 0 | $500K | YC investment$500K, Apr 2023 | ||
serverless platform for real-time data | S22Inactive | 2 | 0 | $500K | YC investment$500K, Aug 2022 | ||
AI-powered code security | X25Acquired | 1 | 0 | $500K | YC investment$500K, Jun 2025 | ||
The AI Secretary for Email and Calendar. | W25 | 1 | 0 | $500K | YC investment$500K, Mar 2025 | ||
Embed charts, dashboards and exports in your app | S23 | 1 | 0 | $500K | YC investment$500K, Sep 2023 | ||
Incentives and financing for energy efficiency upgrades | S23Inactive | 1 | 0 | $500K | YC investment$500K, Sep 2023 | ||
Automatic software R&D capitalization | W23Inactive | 1 | 0 | $500K | YC investment$500K, Apr 2023 | ||
AI-native operating system for analytics teams | W23Inactive | 1 | 0 | $500K | YC investment$500K, Apr 2023 | ||
Open-source, design centric software for interacting with blockchains | S19 | 314 | 0 | $19.5M | Series A$18M, Oct 2021 | ||
The Revenue Excellence Platform | W20 | 223 | 2 | $17M | Non-equity support$10M, Mar 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
50 Y Combinator companies have a founder who worked at Stripe; 36 are active.
7 companies posted roles in the last 60 days, led by Accord (2 roles), Numeral (2 roles) and GovEagle (2 roles). 12 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): SyntheticFi (+73%), Loula (+50%) and Cleva (+27%).
Largest latest rounds in the last 12 months, after their YC batch: Numeral ($100M), Lua Global Inc ($5.8M) and Astor ($5M).