Today, BillionToOne goes public, becoming YC's fourth publicly traded biotech company. More importantly, they have built one of the most important genetic tests in the U.S. Today, 1 in 11 babies born in the US are tested with BillionToOne's fetal genetic test.
Dalton Caldwell’s Move to Partner Emeritus
by Garry Tan6/12/2025
After 12+ years, 25 batches, and working with more than a thousand startups, Dalton Caldwell is transitioning to Partner Emeritus at YC.
Welcoming Jon Xu and Andrew Miklas as YC’s Newest General Partners
by Garry Tan5/21/2025
Over the last few batches, visiting partners Jon Xu and Andrew Miklas have become two of the most trusted voices in the YC community. They were both founders in YC’s Summer 2010 batch, and now, 15 years and two industry-shaping companies later, they’re back in a new role: General Partners at YC.
Tyler Bosmeny built Clever into a $500M company–now he’s helping YC founders do the same as General Partner
by Garry Tan4/1/2025
We’re thrilled to welcome Tyler Bosmeny back to YC, this time as a General Partner.
Michael Seibel's Legacy Continues at YC: Transition to Partner Emeritus
by Garry Tan3/20/2025
If you’ve been around YC, you know Michael Seibel has been a huge part of it for over a decade. He’s done it all - YC Founder (w07, w12), Group Partner, and Managing Director/CEO of the YC accelerator. Along the way, he’s helped thousands of founders, shaped how we work with startups, and played a big role in YC’s growth.
East Coast College Tour 2025
by Y Combinator3/13/2025
YC is going on a college tour! We're visiting Harvard, Yale, MIT, Columbia, Cornell, and Cornell Tech. If you're a current student at any of those schools and interested in startups, we'd love to meet you.
Summer Fellows Grants
by Harj Taggar2/17/2025
This summer, YC will be giving grants to college students to work on their own technical projects. We’re calling these the Summer Fellows Grants. We hope this will encourage the smartest students to indulge their intellectual curiosity and work on hard technical things.