The 9 buzziest startups from Y Combinator’s latest Demo Day, according to VCs

Y Combinator's latest Demo Day showcased a shift toward deep tech startups, with investors highlighting companies like Atomarine and Dipole Labs. These startups are focusing on innovative solutions for data center energy efficiency and infrastructure.
Why it matters
The trends emerging from Y Combinator often signal the future direction of venture capital investment and technological innovation in the tech sector.
Another Y Combinator Demo Day took place on Thursday, but this batch looked a little different. While every cohort brings a fresh wave of founders, the startups presenting this week skewed far more toward deep tech than in past years.
As we do every quarter, TechCrunch asked early-stage VCs to name the hottest startups in this batch — both their top picks and the deals everyone was talking about. And as usual, we put together a list of startups flagged by at least two investors as the buzziest in the batch.
The tech in this batch felt “like science fiction,” as one investor put it. But beyond the wild ideas, the consensus was that valuations were far more grounded than in recent cohorts.
We’ve listed the top picks alphabetically below:
What it’s building: Nuclear-powered data centers floating at sea
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