Y Combinator CEO Garry Tan told CNBC that this group is growing significantly faster than past cohorts and with actual revenue. The winter 2025 batch of YC companies in aggregate grew 10% per week, he said.

“It’s not just the number one or two companies — the whole batch is growing 10% week on week,” said Tan, who is also a Y Combinator alum. “That’s never happened before in early-stage venture.”

That growth spurt is thanks to leaps in artificial intelligence, Tan said.