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AI agent startups at Y Combinator’s Spring ’25 Demo Day

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Priyanka Shrestha of Galen AI, Xavier (Tianhao) Chi of Mbodi AI, and Vaibhav Dubey of Plexe.

Priyanka Shrestha of Galen AI, Xavier (Tianhao) Chi of Mbodi AI, and Vaibhav Dubey of Plexe. Galen AI, Mbodi AI, Plexe

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Christmas came early for Y Combinator. The storied Silicon Valley accelerator had AI agents startups at the top of their wish list — and the startup community delivered.

When Y Combinator issued a callout earlier this year for more founders building so-called "agentic" AI — software that can essentially think and perform tasks on its own — entrepreneurs were all ears. Of the 144 companies in YC's spring 2025 batch, 70 build agents, according to the accelerator's startup directory. Many of the spring batch startups showed off their technology at YC's Demo Day on Wednesday.

Each batch brings together a few hundred early-stage startups for a three-month sprint of product development and mentorship in San Francisco. Tens of thousands apply, and only a fraction make the cut. YC invests $500,000 in every company it selects, and its alumni roster includes success stories such as Stripe, Airbnb, DoorDash, Coinbase, and Instacart.

2025 marks the first time YC has run a spring cohort, which ran from April to June.

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