Supio

Introduction

Supio is an AI platform built specifically for personal injury and mass tort law firms. Founded in 2021 and headquartered in Seattle, Supio helps plaintiff-side legal teams extract critical insights from unstructured case data — medical records, police reports, expert opinions — to uncover missed evidence, generate demand packages, draft litigation documents, and automate case preparation. The company has raised a total of $91 million, including a $25 million Series A in August 2024 and a $60 million Series B in April 2025 led by Sapphire Ventures with participation from Mayfield and Thomson Reuters Ventures. In 2026, Supio announced a partnership with Thomson Reuters that brings Westlaw Advantage research and CoCounsel-style drafting and document review into Supio’s Document Intelligence platform, alongside the launch of "Supio Agent," which the company describes as an end-to-end agentic AI platform for plaintiff law.

Legal Research

Supio’s research focus is internal and case-specific rather than a general law library: it scans medical records, expert and witness reports, and police reports to surface missing treatments, inconsistencies, and gaps in care, answering natural-language questions with source-linked citations back to the underlying documents. Its 2026 partnership with Thomson Reuters adds genuine external legal research on top of this — Westlaw Advantage access and CoCounsel-style research and drafting — closing what was previously Supio’s biggest research gap versus general-purpose legal AI tools.

Contract Analysis

"Contract analysis" in Supio’s context means analyzing case documents (medical bills, expert reports, records) rather than commercial contracts. Supio automates "Instant Demands" and full demand-letter packages by pulling facts, exhibits, liabilities, and damages from case data, and its Case Signals feature flags treatment gaps, missing bills, and inconsistencies across records. A newer Exhibit Builder and a beta Tabular Analysis feature extend this into structured, table-based review of large document sets for litigation and pre-litigation work.

Document Drafting

Supio drafts the documents personal injury litigation actually requires: demand letters, complaints, discovery requests (interrogatories, requests for admission), deposition questions, and opening statements, all grounded in the specific case’s medical findings and witness statements. Firms can use their own templates and tone, with a prompt library to speed up common document types. This is a genuine strength area precisely because Supio specializes narrowly in PI/mass tort workflows rather than trying to cover general legal drafting.

Predictive Analytics

Supio offers predictive-adjacent tools rather than outcome-probability modeling. Case Signals flags case-strength indicators like missing records or treatment gaps, while Case Economics and the newer Instant Ledger estimate financial aspects of a case — projected costs, potential settlement value, and bill/lien reconciliation — through interactive ledgers. Supio publicly claims up to 97% precision in surfacing hidden injuries and case details, though this is a vendor-reported figure that firms should validate against their own caseload before relying on it.

Pricing

Supio does not publish fixed pricing; firms must request a demo and get a quote from sales. Independent estimates for this category of medical-record-analysis and litigation-automation platform typically place costs in the $150–$400 per user per month range, though actual Supio pricing will depend on firm size and case volume.

User Reviews and Ratings

Supio does not yet have a large-sample public rating on G2 or Capterra comparable to more established legal AI products, though it is listed and tracked on both platforms as well as legal-tech directories like LawNext. Its strongest public signals so far are its funding trajectory (backed by Sapphire Ventures, Mayfield, and Thomson Reuters Ventures), its 2026 Thomson Reuters partnership, and steady press coverage of new feature launches (Instant Ledger, Tabular Analysis, Exhibit Builder, Supio Agent) rather than a large volume of independent user reviews.

Verdict

Supio is one of the most focused AI tools available for plaintiff-side personal injury and mass tort practices, and its 2026 Thomson Reuters partnership meaningfully closes its previous legal-research gap. It is a poor fit for firms outside PI/mass tort litigation, and buyers should treat vendor-reported accuracy figures and ROI claims with the same scrutiny they'd apply to any early-stage legal AI vendor, given the still-thin base of independent public reviews.