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Startups & Venture·September 13, 2026·1 min read

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

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Floating reactors and brain chips in the same YC batch point to a risk-on swing back toward deep tech narratives. If you’re raising or buying in these categories, expect more noise in early valuations and prioritize teams with a credible path through regulation and hardware execution, not just demo-day heat.