AfterQuery Becomes Y Combinator's Fastest-Ever Unicorn at $3.2 Billion Valuation
AI training-data startup AfterQuery has reportedly reached a valuation of $3.2 billion, making it the fastest company to become a unicorn in Y Combinator’s history. The firm achieved this milestone just five months after announcing its $30 million Series A round at a $300 million valuation in April 2026 — representing over a tenfold increase in less than six months. Founded by two individuals now aged 22 and 23, AfterQuery is part of the growing trend among AI startups that employ knowledge professionals to train models. The company works with major labs such as Nvidia, Legora, and Motif Technologies, focusing on encoding professional decision-making patterns into its systems. It reported an annualized revenue run rate of $100 million in April. The rapid valuation growth highlights the high demand for AI training solutions and signals strong investor confidence in AfterQuery’s business model and market potential.
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Topics: AI Startups Venture Capital