26 Y Combinator companies with a founder who worked at Square 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 |
|---|---|---|---|---|---|---|---|
Apollo is the foundation of your entire go-to-market strategy. | W16 | 987 | +44% | +54% | 45 | $251M | Series D$100M, Aug 2023 |
Agentic AI CRM for ecommerce | S20 | 353 | +3% | +8% | 1 | $12.8M | Undisclosed round$10.8M, Apr 2022 |
Payment Platform for LatAm Micro and Small Businesses | S19 | 116 | +23% | +26% | YC | $88.5M | Debt$42.3M, Feb 2026 |
AI agent for community management | W22Acquired | 48 | +33% | +109% | 0 | ||
AI tax filing for complex returns | W19 | 40 | +3% | +11% | 0 | $15.8M | Series A$13M, Apr 2021 |
Complete QA platform for voice agents | S24 | 20 | +18% | +43% | YC | $4.3M | Seed$3.8M, Dec 2024 |
Risotto auto-solves IT support requests using AI | W24 | 19 | +6% | +111% | 0 | $10.5M | Seed$10M, Jan 2026 |
Billing and project management for utility construction | W23 | 13 | +30% | +30% | YC | $2.7M | Seed$2.2M, Apr 2023 |
The AI Platform for Healthcare Education | S23 | 12 | −14% | 0 | SeedSep 2023 | ||
Transforming Finances, Maximizing Your Money Potential. | W22Inactive | 12 | +33% | 0 | Pre-seedMay 2022 | ||
Build and ship native Swift apps with AI | S25 | 9 | +29% | 0 | |||
Next-Gen Financial Analysis and Reporting with AI Agents | S21Inactive | 9 | +50% | +80% | 0 | $2.5M | Seed$2.5M, Jan 2025 |
Protecting your employees against online harassment | S18 | 9 | +29% | +29% | 0 | $1M | Seed$1M, Sep 2023 |
Real-time governance for enterprise communications | F24 | 6 | 0% | −14% | YC | $500K | YC investment$500K, Jan 2025 |
Bookkeeping, compliance and tax for founders | F24 | 4 | −20% | −33% | 0 | Pre-seedMay 2025 | |
AI-powered order taker for restaurant drive-thrus | W23Acquired | 4 | −20% | 0 | $500K | YC investment$500K, Jan 2024 | |
Decision infrastructure for investment firms | W23Acquired | 4 | −64% | −56% | 0 | Pre-seedJan 2023 | |
Workflow automation for healthcare providers | S22 | 4 | −33% | −56% | 0 | $3.5M | Seed$3M, Nov 2023 |
Classify Anything | W22 | 3 | 0 | $500K | YC investment$500K, Mar 2022 | ||
AI Agents for Platform Engineering | F25 | 2 | 0 | SeedNov 2025 | |||
Observability and evaluation platform for LLM apps. | S23 | 2 | 0 | $500K | YC investment$500K, Sep 2023 | ||
AI Powered Product Discovery | W23Inactive | 2 | 0 | $2M | Seed$1.5M, Jun 2023 | ||
AI-Native Medical Billing Services | W26 | 1 | 0 | $500K | YC investment$500K, Mar 2026 | ||
Let your camera understand the world | F24 | 1 | 0 | $500K | YC investment$500K, Dec 2024 | ||
A live online learning platform that empowers kids ages 3-18. | W16 | 1,505 | 7 | $240M | Series D$110M, Oct 2021 | ||
The global online platform empowering independent retail. | W17 | 1,289 | 17 | $1.7B | Secondary$416M, Nov 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
26 Y Combinator companies have a founder who worked at Square; 20 are active.
4 companies posted roles in the last 60 days, led by Apollo.io (45 roles), Faire (17 roles) and Outschool (7 roles). 7 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Apollo.io (+44%), Clad (+30%) and Zippi (+23%).
Largest latest rounds in the last 12 months, after their YC batch: Risotto ($10M).