Seattle-based legaltech startup Supio has raised $60 million in new funding to expand its AI-powered platform that automates document analysis for legal teams.
The Series B round was led by Sapphire Ventures, with participation from Mayfield and Thomson Reuters Ventures, bringing the company’s total funding to $91 million.
Supio’s software is designed to streamline tedious legal processes — particularly in personal injury law — by automating the review of complex, unstructured data like medical records, police reports, and expert opinions. The platform integrates directly with law firms’ file systems and uses AI models with human-in-the-loop verification to ensure accuracy.
“We’re transforming how legal professionals work with documents,” said co-founder and CEO Jerry Zhou, who started Supio in 2021 with co-founder Lam, his former colleague at Avalara. “Our system now supports over 114 case types, and that number continues to grow.”
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Growth Amid Rising AI Adoption
As AI adoption in the legal field surged from 11% in 2023 to 30% in 2024, Supio’s traction has mirrored the trend. The startup has quadrupled its annual recurring revenue and customer base over the past year, onboarding clients like Hughes & Coleman, Whitley Law, and Daniel Stark.
To support this growth, Supio is expanding its Seattle headquarters, opening a second office, and doubling its current 100-person team. The company has also added new leadership across sales, customer success, and marketing.
“If Excel revolutionized finance 30 years ago, AI is now doing the same for the legal industry,” Zhou said.
Supio’s long-term ambition is to become the go-to AI platform for all legal data workflows, offering deep specialization in legal knowledge work rather than general-purpose document processing.
