AfterQuery has reportedly raised a round valuing it at $3.2 billion, just five months after announcing its $30 million Series A at a $300 million valuation in April. According to Y Combinator partner Gustaf Alströmer, this represents the fastest any startup has gone from launch to unicorn status in the accelerator's history—a more than 10x increase in less than half a year.
The San Francisco startup's founders are 22 and 23 years old and attended Y Combinator's Winter 2025 cohort, just 18 months ago. In April, AfterQuery said it had reached an annualized revenue run rate of $100 million and was working with many of the biggest AI labs, naming customers including Nvidia, Legora, and the Korean AI lab Motif Technologies.
Rather than ensuring models answer questions accurately, AfterQuery trains models and agents on how professionals would complete tasks, describing its approach as "encoding the patterns, decisions, and reasoning of the world's best practitioners." Forbes first reported on the round. AfterQuery could not be immediately reached for comment.