AI training startup AfterQuery rockets to $3.2B valuation months after Series A
AfterQuery, which trains AI models using specialist knowledge workers, has raised a round valuing it at $3.2 billion, according to reports. That marks a tenfold increase from its $300 million valuation in April and makes it the quickest startup in Y Combinator history to reach unicorn status. The company claims an annualized revenue run rate of $100 million and counts major labs among its clients.
AfterQuery’s valuation surge follows its April Series A, when the San Francisco firm reported a $100 million annualized revenue run rate and named Nvidia, Legora, and Korea’s Motif Technologies as clients. The company differentiates itself by training models on how specialists complete tasks, rather than just answer questions, encoding professional reasoning patterns. Its founders, aged 22 and 23, went through Y Combinator’s Winter 2025 cohort just 18 months ago, and a YC partner confirmed the record pace to unicorn status. Forbes first reported the new round; AfterQuery did not respond to requests for comment.
This rapid valuation growth could signal intense investor demand for specialized AI training labor, potentially reshaping how knowledge workers are compensated and deployed. If AfterQuery’s approach proves scalable, it may accelerate AI adoption in professional fields like law and medicine, but also raises questions about job displacement and the commodification of expert judgment. Smaller labs without such resources could face competitive pressure, while regulators may scrutinize the concentration of AI training power among a few startups.