Supio Raises $60M to Accelerate Growth in Legal AI

Supio, a startup that leverages AI to automate data collection and analysis for legal teams, has secured $60 million in a funding round led by Sapphire Ventures, with participation from Mayfield and Thomson Reuters Ventures. This round brings Supio’s total funding to $91 million.

Co-founder and CEO Jerry Zhou told that the new capital will be used for expansion, hiring, and go-to-market efforts. Supio plans to grow its Seattle headquarters and open a new office while nearly doubling its current 100-person staff.

Responding to Legal Industry Demand for AI

Supio is entering a rapidly evolving space where AI is gaining traction in legal tech. Despite skepticism around AI’s ability to handle nuanced legal work, law firms are feeling competitive pressure to adopt new technologies. A recent survey indicated that AI adoption in the legal field jumped from 11% in 2023 to 30% in 2024.

Supio was born out of the shared vision of Jerry Zhou and Kyle Lam, childhood friends and former coworkers at tax software company Avalara. They left Avalara to “transform how people work with documents,” identifying a gap in how legal professionals handle massive volumes of unstructured data.

“Every day, attorneys and paralegals spend thousands of hours manually reviewing medical records, police reports, and expert opinions,” Zhou said. “Supio’s core product serves these users by giving them a deep understanding of their complex, unstructured data.”

A Legal AI Platform Designed for Personal Injury Law

Supio specializes in personal injury law, offering an AI-powered platform that integrates with law firms’ existing file systems to assist with case management. The company emphasizes “human verification” to mitigate AI-generated errors and uphold high accuracy standards.

“We focus deeply on specialized [AI] model and quality control at the document and data layer,” said Zhou. “Our legal AI supports over 114 case types and that number is growing in partnership with our customers.”

The platform helps legal teams manage documentation more effectively by surfacing insights from records, reports, and expert analyses — tasks that traditionally consumed vast amounts of manual effort.

Rapid Growth and the Future of Legal Tech

2024 has been a breakthrough year for Supio. According to Zhou, the company’s annual recurring revenue grew 4x, and its customer base also quadrupled. Clients now include Hughes & Coleman, Daniel Stark, Thomas Law Offices, Whitley Law, and other firms specializing in personal injury and mass tort cases.

To sustain this momentum, Supio recently appointed new heads of sales, customer success, marketing, and advertising.

Zhou believes AI is bringing a transformational shift to legal workflows:

“AI has created a major inflection point for the legal industry as a whole,” he said. “Every firm across every sub-vertical of law is thinking about how they need to reinvent themselves for the AI era. If Excel transformed finance 30 years ago, AI will do the same for legal knowledge workers.”