BillionToOne Goes Public — The Startup That Made Genetic Testing Universal
Y Combinator
by Jared FriedmanNovember 6, 2025
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.
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Originally published on Y Combinator on 11/6/2025