Silicon Valley startup accelerator founded by Paul Graham — providing seed funding, mentorship, and community to early-stage startups twice yearly — alumni include Airbnb, Dropbox, Stripe, Reddit, Coinbase, DoorDash.
Creates the modern startup accelerator model — YC's combination of small seed checks, short intensive program, Demo Day, and permanent alumni network transformed how startups are built and funded globally; Paul Graham's essays became the canonical texts of startup culture.
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