Paxton, a cutting-edge AI platform revolutionizing legal workflows, has closed a $22M Series A funding round led by Unusual Ventures, alongside Kyber Knight, 25Madison, and Wisconsin Valley Ventures. This brings Paxton’s total funding to $28M, following its $6M seed round in 2023.
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The funding will accelerate Paxton’s mission to empower legal professionals by automating labor-intensive tasks, enabling strategic, high-value work. Paxton’s platform combines advanced AI capabilities like real-time legal updates, multi-jurisdictional research, and rapid document drafting, delivering unparalleled accuracy with a 94% non-hallucination rate on the Stanford Legal Hallucination Benchmark.
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“Our mission is to make advanced legal tools accessible to firms of all sizes,” said Tanguy Chau, Ph.D., CEO and Co-Founder of Paxton. “With this funding, we’re poised to drive innovation, enhance efficiency, and transform how legal teams operate.”
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Used by solo practitioners and several of the largest U.S. law firms, Paxton’s all-in-one solution is leveling the playing field in legal tech. Key features like the Confidence Indicator and AI Citator provide transparency and reliability in legal research, while its scalable design supports everything from small firms to global enterprises.

"We met the world-class founders of Paxton when they were just getting going”, said John Vrionis, Managing Partner and Founder of Unusual Ventures. “We doubled down and led this financing because we've seen relentless focus and tremendous growth. The Paxton solution is clearly the leading AI-first legal solution for small and mid-sized firms”.

With a 14x growth in monthly recurring revenue and an 8x increase in active customers over nine months, Paxton is redefining what’s possible in legal AI. The Series A funding will expand its technology, grow its team, and meet rising demand from legal professionals worldwide.

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