Seattle-based legal artificial intelligence startup Supio today said it has raised $60 million in a Series B round to build its platform that helps lawyers organize, analyze and prepare legal cases.

The round was led by existing investor Sapphire Ventures, with participation from new investors Mayfield and Thomson Reuters Ventures. Today’s investment brings Supio’s total funding to date to $91 million.

The company specializes in personal injury and mass tort plaintiff law when multiple clients file a lawsuit. It provides software that combines purpose-built AI models with human expert verification to avoid hallucinations to increase the accuracy and reliability of legal AI.

According to the Supio, this has been valuable in litigation where precision and data are paramount, especially when vast amounts of unstructured data need to be processed, such as legal documents, medical documents, handwritten notes, claims and more.

“We’re building technology that doesn’t just save time, but fundamentally improves case outcomes,” said co-founder and Chief Executive Jerry Zhou.

Citing statistics from partner firms, Supio said its platform has led to significant improvements in win rates and case success. Travis Legal Offices reported increases of at least 20% to 30% per case and Thomas Law reported increasing its annual case volume by 62% since adopting Supio.

In a high-stakes litigation, Supio assisted TorHoerman Law secure a massive $495 million verdict against Abbott Labs involving allegations that cow’s milk-based infant formula caused intestinal inflammation in premature babies.

“Supio is transforming how personal injury and mass tort litigation is practiced through specialized AI,” said board member Rajeev Dham, a partner at Sapphire Ventures. “We believe their exponential growth demonstrates that law firms are embracing AI tools that deliver measurable advantages in case preparation and outcomes.”

The field of AI-assisted legal work is still a developing industry. Supio joins many other startups looking to provide lawyers with accurate and reliable AI tools to assist them in the courtroom. Especially because general AI models can hallucinate, or produce completely false or made-up results, which means that they produce fake case citations.

Numerous examples of law firms have surfaced getting themselves in trouble using AI tools, including Morgan & Morgan, one of the top law firms in the United States, when an attorney blindly cited AI-hallucinated case law earlier this year.

By building a solution that mitigates hallucinations through rigorous human verification, Supio said, it hopes to accelerate the adoption of its AI tools by personal injury law firms.

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