afterquery

AfterQuery is an applied research lab pioneering data solutions for frontier foundation model development. Founded in 2024 and headquartered in San Francisco, the company has quickly become essential infrastructure for AI labs pushing the boundaries of artificial intelligence. Their core mission centers on capturing the tacit knowledge that exists in how experts actually think - not just answers, but the reasoning, decisions, tradeoffs, and context that define professional excellence.

The company operates at the intersection of research and data engineering, building datasets that reflect how domain experts solve complex problems step by step. AfterQuery's data offerings span supervised fine-tuning with chain-of-thought reasoning traces, reinforcement learning with expert-designed rubrics, agent environments for API and tool interactions, and computer use trajectories across browser and desktop environments. This approach stems from their belief that models trained on outputs plateau, while models trained on reasoning improve.

AfterQuery has achieved remarkable traction, surpassing $100 million in annual revenue run rate and closing a $30 million Series A at a $300 million valuation. The company is backed by leading investors including Altos Ventures, BoxGroup, Y Combinator, and angels from Google DeepMind, OpenAI, Anthropic, Meta Superintelligence Labs, and Microsoft AI. They serve every frontier AI lab, working to make expertise that once took a lifetime to build available to anyone who needs it.