entity Updated 2026-07-11 Tags: Program, Startups, Y-Combinator

Summer Founders Program

The Summer Founders Program appears in Paul Graham on Viaweb, Y Combinator, and Writing as the first Y Combinator program. Paul Graham says the team initially thought it might be a one-off summer experiment for undergraduates, but the quality of applicants quickly made the work feel more serious.

The program is the source’s clearest bridge from experiment to institution. Its grouped format became the YC “batch,” its first companies included Reddit and Sam Altman, and its dinners, interviews, and Demo Day experiments became part of Startup Accelerator Batch Selection and Founder-Investor Learning.

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