Get an API keyGet an API key11 Y Combinator companies with a founder who worked at MITRE before.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
UsulS24
RemoraW21
Zeal+3%
Mayan+2%| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Modular carbon capture | W21 | 79 | +13% | +23% | 0 | $5.5M | Series A$5.5M, Feb 2024 |
A growth automation platform for Amazon sellers | W21 | 46 | +2% | +12% | 0 | $7M | Series A$5M, Mar 2023 |
Modern payroll for modern work | S19 | 40 | +3% | +5% | 0 | $30.4M | Series B$15M, Oct 2024 |
 Benefits for independent workers. | W19Acquired | 24 | +9% | +4% | 0 | $20.1M | Series A$12M, Jul 2021 |
 Infrastructure powering stablecoin and digital finance | S22 | 13 | 0% | −7% | YC | SeedJun 2022 | |
AI Platform for Winning Defense & Government Contracts | S24 | 12 | −25% | +33% | 3 | $3.3M | Seed$3.3M, May 2025 |
 A DecisionOps platform that accelerates optimization AI teams | W20Acquired | 10 | −41% | −44% | 0 | $19.4M | Series A$8M, Nov 2022 |
 Your always-on red team. | S25 | 4 | YC | $500K | YC investment$500K, Jan 2026 | ||
 OpenClaw for manufacturers | S26 | 3 | 0 | ||||
 AI-powered user assistance platform | S20Acquired | 3 | 0 | $23.8M | Series A$19M, Apr 2022 | ||
 Smyte stops bad actors on social networks and marketplaces. | W15Acquired | 1 | 0 | $6.3M | Series A$4M, Mar 2017 |
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
11 Y Combinator companies have a founder who worked at MITRE; 7 are active.
1 companies posted roles in the last 60 days, led by Usul (3 roles). 3 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Remora (+13%), Zeal (+3%) and Mayan (+2%).
No reported rounds after their YC batch in the last 12 months.