Legal AI Startup Supio Scores $60 Million to  Help Lawyers Win Big with AI

Supio, the fast-growing AI platform reshaping how personal injury and mass tort law firms manage high-stakes litigation, has raised $60 million in Series B funding, bringing its total to $91 million. The round was led by Sapphire Ventures, with new backing from Mayfield and Thomson Reuters Ventures, a sign that Supio’s AI-first approach is gaining momentum across legal tech and investor circles alike.

Founded on the belief that AI can meaningfully improve legal outcomes and not just speed up paperwork, Supio has carved a niche by combining custom-trained AI with human legal experts to deliver document analysis, drafting, and case intelligence that lawyers actually trust. 

In contrast to many generic legal AI tools that struggle with accuracy and hallucinations, Supio’s platform is tailored specifically for the nuanced, document-heavy workflows of plaintiff-side litigation.

Built for the Cases That Matter 

In mass tort and personal injury cases, where thousands of documents and millions of dollars are at stake, precision isn’t optional it’s critical. The company’s platform analyzes medical records, legal filings, insurance data, and more to extract key facts, flag inconsistencies, and help lawyers build stronger cases, faster.

“Our growth since Series A confirms what we’ve believed all along—that specialized AI built for personal injury and mass tort law can transform how these practices operate,” said Jerry Zhou, Supio’s co-founder and CEO. “By expanding our executive team, we’re positioning Supio to meet the tremendous market demand for our AI-first approach to legal document workflows, and to deliver concrete results: faster case resolution, stronger settlements, and ultimately better outcomes for the individuals seeking justice.”

That focus is paying off. Since emerging from stealth in August 2024 with a $25M Series A, Supio has quadrupled its ARR and grown its customer base to include many of the top mass tort and personal injury firms in the U.S., including Thomas Law Offices, Whitley Law, and Travis Legal Offices.

And the results are real. Thomas Law Offices reported a 62% increase in annual case volume since adopting Supio, while Travis Legal claims its attorneys are earning 20–30% more per case thanks to stronger evidence packages and smarter drafting.

What Sets Supio Apart

Supio’s secret sauce is its human-in-the-loop architecture, which blends machine learning with legal expert review to ensure every AI-generated output meets courtroom standards.

This hybrid model addresses the AI hallucination problem head-on, which is particularly serious risk in legal settings, where inaccuracies can derail cases or erode client trust. Supio says its AI never operates in a black box: every insight is traceable, verifiable, and tuned for legal precision.

“Thomson Reuters Ventures invests in innovative companies that align with our strategic focus and the markets we serve. In the legal industry, personal injury and mass tort litigation demand specialized AI solutions designed specifically for these complex practice areas, and Supio addresses these unique challenges with both accuracy and depth,”, said Tamara Steffens, Managing Director at TR Ventures. 

The new funding will support Supio’s expansion into more law firms across the U.S., accelerate its product roadmap, and grow its engineering and AI research teams. Supio has also bolstered its leadership bench, hiring Jay Deubler (ex-Avalara) to lead Sales, Gwen Sheridan (ex-Highspot) for Customer Success, and Jim Sinai, a former Salesforce executive who launched Einstein AI, as Chief Marketing Officer.

“Supio is transforming how personal injury and mass tort litigation is practiced through specialized AI,” said Rajeev Dham, Partner at Sapphire Ventures. “We aim to recognize a category-defining company when we see one, and we’re proud to deepen our partnership with the team revolutionizing this practice area.”