The artificial intelligence training-data enterprise AfterQuery has reportedly secured a new funding round that pushes its valuation to an astonishing $3.2 billion, arriving just five months after its $30 million Series A valued the business at $300 million back in April.
That represents a massive tenfold valuation leap in under six months, marking what Y Combinator partner Gustaf Alströmer calls the fastest journey from inception to unicorn status in the renowned accelerator’s entire timeline. The youthful founders of AfterQuery, currently 22 and 23 years old, participated in YC’s Winter 2025 batch a mere year and a half ago.
Back in the spring, the San Francisco-based enterprise disclosed that it had achieved an annualized revenue run rate of $100 million while collaborating with several leading research labs. Its public client roster features major names such as Nvidia, Legora, and South Korean AI laboratory Motif Technologies.
AfterQuery sits among a modern wave of ventures—reminiscent of Scale and Mercor—that leverage subject-matter experts like attorneys, physicians, and distinct specialists for machine learning preparation. Yet, instead of simply verifying factual accuracy, AfterQuery focuses on instructing models and autonomous agents to execute complex assignments similarly to human veterans, defining its mission as “encoding the patterns, decisions, and reasoning of the world’s best practitioners.”
The investment was initially broken by Forbes. Representatives for AfterQuery were unavailable for immediate comment regarding the news.
