AfterQuery reportedly becomes Y Combinator’s fastest-ever unicorn, now valued at $3.2B

In Brief

AI training-data startup AfterQuery has reportedly raised a circular that valued it astatine $3.2 billion. This conscionable 5 months aft announcing its $30 cardinal Series A astatine a $300 cardinal valuation successful April.

That’s much than a 10x summation successful little than fractional a twelvemonth and, according to Y Combinator spouse Gustaf Alströmer, the fastest that immoderate startup has gone from motorboat to unicorn presumption successful the accelerator’s history. AfterQuery’s founders, contiguous 22 and 23 years old, attended Y Combinator’s Winter 2025 cohort, conscionable 18 months ago.

In April, the San Francisco startup said it had reached an annualized gross tally complaint of $100 million and that it was moving with galore of the biggest labs. It has named companies including Nvidia, Legora and the Korean AI lab Motif Technologies, arsenic customers.

AfterQuery is among the caller harvest of startups pursuing successful the footsteps of Mercor and Scale that employment cognition professionals similar doctors, lawyers, and different specialists, to bash exemplary training. However, alternatively than ensuring that models reply questions accurately, AfterQuery trains models and agents connected however to enactment similar professionals would to implicit tasks — what the institution describes arsenic “encoding the patterns, decisions, and reasoning of the world’s champion practitioners.”

Forbes archetypal reported connected the round. AfterQuery could not beryllium instantly reached for comment.

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