Get an API keyGet an API key16 Y Combinator companies with a founder who worked at TikTok before.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
Retell AIW24
Icarus5
YouArtX26
Fresco+67%Icarus+46%
PaxS24
Veria LabsF25| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Supercharge Your Contact Center Operations with AI Phone Agents | W24 | 196 | +45% | +109% | 20 | $4.7M | Seed$4.6M, Apr 2024 |
Stratospheric birds for defense | F25 | 73 | +46% | +143% | 5 | $650K | YC investment$500K, Dec 2025 |
Patreon for AI Originals | X26 | 22 | +144% | 0 | $500K | YC investment$500K, Jun 2026 | |
AI Native Operating System for Global Trade | S24 | 19 | −10% | −5% | YC | $5M | Seed$4.5M, Apr 2025 |
AI copilot for construction estimators | F24 | 10 | +67% | +67% | YC | $500K | YC investment$500K, Dec 2024 |
 The AI-native Recruiting OS | W26 | 5 | 0 | $500K | YC investment$500K, Jan 2026 | ||
Continuous AI pentesting that finds and fixes vulnerabilities | F25 | 5 | 0 | $3.7M | Seed$3.2M, Feb 2026 | ||
 Robots, parts & RL envs & evals - delivered in 48 hrs / pickup in SF. | S25 | 5 | YC | ||||
 Reliable and safe data engineering and data science agents | F26 | 3 | 0 | $700K | Pre-seed (before YC)$700K, May 2026 | ||
 Outbound Sequencing Infrastructure for Startups | W25 | 3 | 0 | $500K | YC investment$500K, Mar 2025 | ||
 The SOP Automation Platform | W25Inactive | 3 | −40% | 0 | |||
 Scan to 3D Model | S26 | 2 | 0 | ||||
 One tool to supercharge your productivity. | W22 | 2 | 0 | $3.5M | Pre-seed$3M, Jan 2023 | ||
 Daily productivity tracker | W25Inactive | 1 | 0 | $500K | YC investment$500K, Mar 2025 | ||
 Automate prospect research at scale | W22Inactive | 1 | 0 | $500K | YC investment$500K, Mar 2022 | ||
 Trade memecoins, perpetuals, and earn yield. | W25 | 45 | YC | $500K | YC investment$500K, Mar 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
16 Y Combinator companies have a founder who worked at TikTok; 13 are active.
2 companies posted roles in the last 60 days, led by Retell AI (20 roles) and Icarus (5 roles). 6 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): YouArt (+144%), Fresco (+67%) and Icarus (+46%).
Largest latest rounds in the last 12 months, after their YC batch: Veria Labs ($3.2M).