
Fiduciary-Grade AI built to the standard the legal profession demands
CoCounsel Legal is a generative and agentic AI assistant from Thomson Reuters that handles research, analysis, and drafting from a single plain-language query. It reasons step by step and delivers cited work product grounded in Westlaw primary law, Practical Law guidance, and a firm's own documents.
Product
CoCounsel Legal
Use cases
Research & Knowledge Management · Litigation & Dispute Resolution
Funding stage
Public
Last updated
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The product builds a transparent, inspectable plan for each matter and produces polished drafts with linked citations for verification. It supports contract review, litigation strategy, deal structuring, and circuit-split analysis. Integrations span iManage, NetDocuments, SharePoint, HighQ, DeepJudge, Smokeball, Box, Litify, Microsoft Word, Outlook, Teams, Claude, and Supio. SOC 2 and ISO 42001 certified, with data never used to train underlying models.
What it does
Centralizes documents, templates, conversations, and matter history in one place.
Builds litigation briefs grounded in Westlaw and Practical Law authority.
Reviews up to 10,000 documents against 100 questions in one table.
Westlaw-grounded research tool built for real casework.
Analyzes litigation documents grounded in trusted Westlaw content.
Who it is for
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Trust & compliance
Security certifications
Named enterprise customers
Pricing details
Starting price
Pricing model
Free version
Product videos & screenshots
Product interface
CoCounsel Legal Interface
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Thomson Reuters has launched a beta version of CoCounsel Legal Reimagined on April 20, 2026, introducing a fully agentic AI platform built on Anthropic's Claude Agent SDK for legal professionals world

Thomson Reuters has joined NetDocuments' ndConnect interoperability program, enabling shared customers to integrate CoCounsel Legal's AI capabilities with NetDocuments' platform. The partnership was a

Thomson Reuters launched CoCounsel Legal on Tuesday, a unified AI platform that integrates research, workflows, and document management for legal professionals. This launch represents Thomson Reuters'
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FAQs
CoCounsel Legal is Thomson Reuters' AI assistant engineered to work at the level of a senior associate. It reasons from authoritative Westlaw primary law, Practical Law guidance, and an organization's own knowledge. Built to professional standards, it is Fiduciary-Grade AI attorneys can trust for research, analysis, and drafting work that matters.
Describe a matter in plain language — contract review, litigation strategy, deal structuring, or circuit split analysis — and CoCounsel Legal develops the approach, validates the work, and produces high-quality output. Every reasoning step is visible, and every citation is linked so attorneys can click through and verify the work themselves.
Yes, CoCounsel Legal uses generative AI and agentic AI to handle complex legal work, powering capabilities like deep research and litigation document analysis. Grounded in trusted Westlaw and Practical Law content, it provides verifiable results so users can feel confident their work is thorough and accurate.
CoCounsel Legal is designed to handle complex, multistep legal work the way an experienced attorney would — developing the right legal approach, working through each step, and delivering polished work product with citations. It builds transparent, inspectable plans and produces cited, verifiable results from trusted sources.
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