Get an API keyGet an API key11 Y Combinator companies with a founder who worked at Lazard before.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
ConveoS24ConveoS24
Bolto+22%
Rollstack+11%
BlueCargoS18
Tesorio−2%ConveoS24Bolto$12M| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Growth through always‑on consumer understanding | S24 | 103 | +54% | +472% | 9 | $55.8M | Series A$50M, Sep 2026 |
Tesorio is the cash flow performance platform that helps finance… | S15 | 44 | +5% | −2% | 0 | $33.9M | Series B$17M, Jul 2022 |
The automated solution for complex freight transactions. | S18 | 32 | −16% | −36% | YC | $19M | Seed$11M, Feb 2023 |
Automate data-driven slide decks and documents with AI | W23 | 31 | +11% | +3% | YC | $12.9M | Series A$11M, Oct 2024 |
AI Powered All-In-One Payroll, HR + Recruiting | S23 | 22 | +22% | +57% | YC | $17.1M | Series A$12M, Apr 2026 |
 Laboratory Information Management System (LIMS) serving… | S15 | 12 | 0% | 0% | 0 | $20.4M | Convertible note$1.8M, Apr 2021 |
 AlphaFlow is a technology-driven investment manager. | W16Inactive | 9 | 0% | 0% | 0 | $20.4M | Secondary$2.9M, Oct 2023 |
 We buy and grow D2C brands in LatAm | S20Acquired | 5 | 0 | $12M | Series A$12M, Jun 2022 | ||
 It's not used, it's Lovd. | W21Inactive | 4 | 0 | $4.5M | Seed$4.5M, Mar 2021 | ||
 Specialized Models for Agents | S25 | 3 | 0 | ||||
 The AI-Native Consumer + Plaintiff Law Firm | X25 | 3 | 0 | $500K | YC investment$500K, Jun 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
11 Y Combinator companies have a founder who worked at Lazard; 8 are active.
1 companies posted roles in the last 60 days, led by Conveo (9 roles). 4 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Conveo (+54%), Bolto (+22%) and Rollstack (+11%).
Largest latest rounds in the last 12 months, after their YC batch: Conveo ($50M) and Bolto ($12M).