Proximal is a San Francisco-based AI data company, with a presence in Bangalore, founded by Justus Mattern, Calvin Chen and Navid Pour. It builds infrastructure that turns unstructured real-world data, such as agent traces and artifacts from human workflows, into evaluations that expose model capability gaps and generate targeted post-training data, selling high-fidelity, long-horizon reinforcement-learning environments for coding agents to frontier labs and enterprises. Launched from stealth in September 2026, the company reports $200M in annualized revenue and raised a $15M seed at a $300M valuation led by General Catalyst, following an earlier undisclosed round led by Scribble Ventures.
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Sep 29, 2026
Latest raise
Funding activity · 1 round
Sep 29, 2026
$15M
Seed
Led by General Catalyst
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