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AfterQuery Achieves $3.2B Valuation, Becomes Y Combinator's Fastest Unicorn
Key points
- AfterQuery's valuation reached $3.2 billion.
- This is a 10x increase from its $300 million valuation in April.
- It is Y Combinator's fastest startup to achieve unicorn status.
- AfterQuery trains AI models to perform tasks like professionals.
Rapid Valuation Increase
AfterQuery, an AI training-data startup, has reportedly secured a funding round that values the company at $3.2 billion. This valuation marks a significant increase from its $300 million valuation in April, achieved just five months ago with a $30 million Series A round.
Y Combinator's Fastest Unicorn
According to Y Combinator partner Gustaf Alströmer, AfterQuery has become the fastest startup in the accelerator's history to reach unicorn status. The company's founders, aged 22 and 23, participated in Y Combinator’s Winter 2025 cohort approximately 18 months ago.
Company Growth and Clientele
In April, the San Francisco-based startup reported an annualized revenue run rate of $100 million. AfterQuery works with major AI labs and has named Nvidia, Legora, and Korean AI lab Motif Technologies as customers.
Specialized AI Training Approach
AfterQuery specializes in training AI models and agents to perform tasks in a manner similar to human professionals, such as doctors and lawyers. This approach focuses on encoding the patterns, decisions, and reasoning of expert practitioners, rather than just ensuring accurate question responses.
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Reporting from
AI training-data startup AfterQuery has reportedly raised a new funding round valuing it at $3.2 billion, a tenfold increase from its $300 million valuation five months prior. This makes AfterQuery the fastest startup to reach unicorn status in Y Combinator's history, highlighting rapid growth in the AI model training sector.