Y Combinator

Y Combinator (YC) is a U.S.-based startup accelerator founded in March 2005 that runs a three-month program for early-stage companies. As of its Winter and Summer 2025 batches, YC provided $500,000 in seed funding per company—$125,000 for 7% equity and $375,000 via an uncapped SAFE with a Most Favored Nation clause. The program culminates in a biannual, invite-only Demo Day, where startups present to a curated group of investors. YC has backed companies such as Airbnb, Stripe, and DoorDash, and its alumni network includes over 10,000 founders. The firm pioneered the SAFE note, a widely adopted instrument for seed-stage fundraising, and its portfolio's combined market capitalization exceeded $600 billion in 2024. YC’s enduring relevance in 2026 is tied to its concentrated deal flow in artificial intelligence and defense technology, sectors where its batch size and founder network provide a competitive signal to later-stage investors navigating an increasingly crowded early-stage landscape.

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