Meet the breakout startups from YC Fall 2025 — the boldest founders and biggest ideas shaping the future of tech.

OpenAI’s co-founder Sam Altman is an alumnus who also was the president of Y Combinator in 2019. If you are in your teens or ...

The incubator aims to fund stablecoin projects backed by compute, energy and fintech credit using Sky's up to $2.5 billion ...

Two MIT dropouts have secured $2.7 million for police tech startup Code Four, which generates reports from bodycam footage.

Zephyr Fusion, the Y-combinator-backed brainchild of two Madison University fusion physicists, has outlined its proposal to ...

Five of Clado ’s team members went to high school 20 minutes away from each other in Toronto. But it took a Y Combinator run ...

Maritime Fusion is developing Yinsen, a low-power-density HTS tokamak designed with an emphasis on reducing the scope between ...

What may start as 'move fast and break things' too often becomes move fast and break everything, then spend a fortune rebuilding it.' ...

Startups are still racing to build the world's first commercial fusion power plant on land, but Maritime Fusion thinks the ...

At Thanksgiving, startup founders face the task of trying to explain what they do to friends and family — and proving that ...

Early-stage startups will learn the hard way that security cannot be an afterthought. Relying too heavily on vibe coding from ...