AI Platforms · Platform Profile
Paxton is an AI legal assistant for research, drafting, and document analysis aimed at solo, small, and mid-sized firms — with published self-serve pricing, which is rare in this market.
Paxton is a conversational AI legal assistant founded in 2023 by Tanguy Chau and Michael Ulin and based in San Francisco. It performs legal research against a curated database of US case law, statutes, and regulations covering federal law and all 50 states, with click-through links to the underlying source documents so answers can be checked against the primary sources.
Beyond research, the platform drafts legal documents, clauses, contracts, and correspondence, and analyzes uploaded files for review and summarization. Two features aim squarely at personal injury practice: medical chronologies and medical billing summaries — capabilities usually found only in dedicated PI platforms at much higher price points. The company has published a self-reported study, using Stanford-developed legal hallucination benchmarks, claiming a 94 percent non-hallucination rate.
Paxton raised a $22 million Series A in January 2025 led by Unusual Ventures, bringing total funding to about $28 million, and reported 14x monthly recurring revenue growth over the nine months before the round. Unlike most legal AI vendors, it publishes its prices: $499 per user per month, or $2,999 per user per year, with a seven-day free trial.
Solo, small, and mid-sized firms across consumer-facing practice areas — personal injury, family, employment, criminal — plus some corporate and in-house use (Bank of America is a cited enterprise user). It positions as the lower-cost, self-serve alternative to enterprise-sales platforms, and its medical chronology features give it unusual relevance to PI firms at its price point.
| Vendor | Paxton AI, Inc. — independent, venture-backed |
|---|---|
| Founded / HQ | 2023; San Francisco, CA |
| Founders | Tanguy Chau (CEO), Michael Ulin (CTO) |
| Category | AI legal assistant — research, drafting, analysis |
| Funding | $28M total; $22M Series A led by Unusual Ventures, January 2025 |
| Pricing | $499/user/month or $2,999/user/year (published); enterprise custom; 7-day trial |
| Integrations | Standalone web platform; no major CMS integrations advertised |
| Compliance | SOC 2, ISO, and HIPAA compliance advertised |
| Website | paxton.ai |
Paxton runs as a standalone assistant beside the rest of the stack — it does not advertise integrations with case management systems, so documents move in and out by upload. For firms that want AI research and drafting without an enterprise procurement cycle, that tradeoff buys simplicity and a public price.
In a plaintiff firm it most often lands as a research-and-drafting layer next to the case management system, and its medical chronology and billing-summary features overlap the lower end of what dedicated PI platforms like EvenUp and Supio sell — worth understanding before paying for both.
It runs on a curated database of primary law rather than open-ended model generation, and cites a self-published 94 percent non-hallucination score on Stanford-derived benchmarks. Independent verification is limited, so firms typically pilot it on research questions they already know the answers to.
Yes — medical chronologies and medical billing summaries are first-class features, which is unusual at this price point.
No major integrations are advertised. It operates as a standalone assistant with file upload.
Pricing is public and self-serve — $499 per user per month or $2,999 per year, with a free trial — versus quote-based enterprise sales for the larger platforms.
Systems firms typically evaluate alongside Paxton — competitors, complements, and the adjacent layers of the same stack.
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This page is an independent editorial overview published by Maestro Strategic Partners, an operations and AI consultancy for plaintiff law firms. Maestro is not affiliated with, sponsored by, or endorsed by Paxton AI, Inc. Paxton and related marks are the property of their respective owners; they are used here for identification only. Product details verified as of July 2026 and may have changed — confirm specifics with the vendor.
