Investors / Operator Stack / Compare with Y Combinator
Operator Stack vs Y Combinator
Operator Stack lists 35 portfolio companies and has joined 3 funding rounds; Y Combinator lists 5,153 companies and has joined 3,373 rounds. Operator Stack comes in most often at Seed (67% of its entries), Y Combinator comes in most often at Seed (98% of its entries). 4 companies are on both portfolios, among them Spherecast, Titipku and Trackstar.
Show as a table
| Operator Stack | Y Combinator | |
|---|---|---|
| Portfolio companies | 35 | 5,153 |
| Funding rounds joined | 3 | 3,373 |
| Rounds led | 0 | 2,945 |
| Rounds, last 12 months | 1 | 579 |
| Typical round it comes in at | $5M to $20M | under $1M |
| Sites no longer answering | 0% | 0% |
Where they come in
share of entries by stageOperator StackY Combinator
Show as a table
| Operator Stack | Y Combinator | |
|---|---|---|
| Pre-seed | 0% | 0% |
| Seed | 67% | 98% |
| Series A | 33% | 1% |
| Series B | 0% | 0% |
| Growth | 0% | 1% |
Themes
share of checked companiesOperator StackY Combinator
Show as a table
| Operator Stack | Y Combinator | |
|---|---|---|
| Fintech | 34% | 13% |
| AI & Machine Learning | 14% | 26% |
| E-commerce & Marketplaces | 13% | 5% |
| Healthcare & Biotech | 8% | 11% |
| Enterprise Software | 0% | 10% |
| Legal & Compliance | 8% | 0% |
Companies both back
4Shared companies are those both firms' own portfolio pages list, each checked against the company's site. The same comparison through the API is POST /v1/overlap, for up to 20 firms. How the data is graded
Compare Operator Stack and Y Combinator as data
Pull both portfolios and every co-investor through one API key or MCP, and lay up to 20 firms side by side with POST /v1/overlap. A free account adds Ask AI searches and alerts when either firm adds a company.
Work email, sign-in link by email. Already have an account? Log in- Ask AI5 plain-English investor searches a day
- Full listsEvery portfolio row and two-firm overlap
- API and MCP100 REST or MCP calls a month, one key
- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/operator-stack.com/portfolio
# also
GET /v1/firms/ycombinator.com/portfolio
GET /v1/firms/operator-stack.com/coinvestors