entity Updated 2026-07-10 Tags: Company, Startup-Accelerator, Venture-Capital

Y Combinator

Y Combinator appears in Trevor Blackwell on Viaweb, Robots, and Early Y Combinator through its earliest operating history. Paul Graham called Trevor Blackwell with the idea of becoming the kind of investor they wished they had during Viaweb, and the first Summer Founders Program began as a one-summer experiment rather than a fully specified institution.

The source emphasizes how physical and improvised the early accelerator was. Applications were emailed, reformatted into PDFs, printed, and scored; interviews were longer than later YC interviews; the first Mountain View program used part of Anybots space; and dinners happened while the building was still being renovated.

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