Get an API keyGet an API key10 Y Combinator companies with a founder who worked at Fidelity Investments before.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
AquaS21
Docsum+63%AquaS21| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
The AI-Native Turnkey Alternative Investment Platform (TAIP) | S21 | 29 | +93% | +142% | YC | $18.9M | Series A$15M, Sep 2026 |
 Icons and social logos for your website. | S15 | 17 | 0% | 0% | 0 | $701K | Equity crowdfunding$701K, Nov 2016 |
AI contract repository | S23 | 13 | +63% | +44% | 0 | SeedOct 2023 | |
 Flight search engine using credit card points and miles | S23 | 9 | +13% | +13% | YC | $500K | YC investment$500K, Sep 2023 |
 AI platform to grow and to optimize car washes | S25 | 6 | YC | $500K | YC investment$500K, Aug 2025 | ||
 All-in-one apartment Marketing Platform for brokerages and landlords. | W11 | 5 | 0% | 0% | 0 | $150K | YC investment$150K, Mar 2011 |
 The ultimate IP assistant. | W23 | 3 | 0 | $500K | YC investment$500K, Apr 2023 | ||
 Open source GenAI development platform | S23Acquired | 2 | 0 | $500K | YC investment$500K, Sep 2023 | ||
 Heroku for AI | W22Inactive | 1 | −80% | 0 | $500K | YC investment$500K, Mar 2022 | |
 Analytics for builders. Record and query billions of datapoints with… | S21Inactive | 1 | 0 |
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
10 Y Combinator companies have a founder who worked at Fidelity Investments; 7 are active.
We found no job postings for these companies in the last 60 days. 3 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Aqua (+93%) and Docsum (+63%).
Largest latest rounds in the last 12 months, after their YC batch: Aqua ($15M).