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Investors / Pioneer Fund / Compare with Y Combinator

Pioneer Fund vs Y Combinator

Pioneer Fund lists 33 portfolio companies and has joined 35 funding rounds; Y Combinator lists 5,151 companies and has joined 3,388 rounds. Pioneer Fund comes in most often at Seed (79% of its entries), Y Combinator comes in most often at Seed (98% of its entries). 26 companies are on both portfolios, among them Alaan, Argon Ai Inc and Autosana.

33Portfolio companies5,151
35Funding rounds joined3,388
2Rounds led2,960
21Rounds, last 12 months579
$5M to $20MTypical round it comes in atunder $1M
0%Sites no longer answering0%
Show as a table
Pioneer Fund and Y Combinator, head to head
Pioneer FundY Combinator
Portfolio companies335,151
Funding rounds joined353,388
Rounds led22,960
Rounds, last 12 months21579
Typical round it comes in at$5M to $20Munder $1M
Sites no longer answering0%0%

Where they come in

share of entries by stage
Pre-seed0%0%
Seed79%98%
Series A21%1%
Series B0%0%
Growth0%1%

Pioneer FundY Combinator

Show as a table
Entry stages of Pioneer Fund and Y Combinator, share of entries
Pioneer FundY Combinator
Pre-seed0%0%
Seed79%98%
Series A21%1%
Series B0%0%
Growth0%1%

Themes

share of checked companies
AI & Machine Learning28%26%
Enterprise Software15%10%
Fintech13%13%
Healthcare & Biotech10%11%
Cybersecurity10%5%
Legal & Compliance5%0%

Pioneer FundY Combinator

Show as a table
Themes of Pioneer Fund and Y Combinator, share of checked companies
Pioneer FundY Combinator
AI & Machine Learning28%26%
Enterprise Software15%10%
Fintech13%13%
Healthcare & Biotech10%11%
Cybersecurity10%5%
Legal & Compliance5%0%

Companies both back

26

Shared 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

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Compare Pioneer Fund 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.

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  • 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
VCinfo API
$ curl -H "X-API-Key: YOUR_KEY" \
  https://api.vcinfo.io/v1/firms/pioneerfund.vc/portfolio

# also
GET /v1/firms/ycombinator.com/portfolio
GET /v1/firms/pioneerfund.vc/coinvestors
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing