Paxton AI

Paxton AI is an all-in-one generative AI assistant built for lawyers. It handles legal research, document drafting, contract review, and mass document analysis across U.S. federal and state law, with a published 94% non-hallucination rate benchmarked against Stanford research. Founded in 2023 by Tanguy Chau and Michael Ulin, the company is based in Palo Alto and has raised $28M total, including a $22M Series A led by Unusual Ventures in January 2025.