CoCounsel Review 2025
CoCounsel is Thomson Reuters's AI legal assistant, combining GPT-4 with Westlaw's legal database to deliver AI-powered research, document review and drafting.
✓ Pros
- •Backed by Westlaw legal database
- •Multi-task AI: research, drafting, document review
- •Trusted Thomson Reuters brand
- •Strong data security and compliance
✗ Cons
- •Enterprise only — high cost
- •Requires Westlaw subscription
- •Less intuitive UI than newer AI tools
What is CoCounsel?
CoCounsel is Thomson Reuters's generative AI assistant for legal professionals, originally developed by Casetext (acquired by Thomson Reuters in 2023). It combines the power of GPT-4 with Westlaw's comprehensive legal database, enabling lawyers to perform research, review documents and draft content using conversational AI backed by authoritative legal sources.
Who is CoCounsel best for?
- Law firms already subscribed to Westlaw - Litigators who need AI-assisted research and brief drafting - Corporate legal teams managing large volumes of contract review - Firms looking for an AI tool with enterprise-grade security and compliance
Key Features
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AI Legal Research CoCounsel can answer complex legal questions by searching Westlaw in real time, synthesizing case law, statutes and secondary sources into structured answers with full citations.
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Contract Review Upload a set of contracts and CoCounsel can identify key provisions, flag missing clauses, compare terms and extract information across multiple documents simultaneously.
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Deposition Preparation CoCounsel can analyze prior testimony, exhibits and case documents to help prepare deposition outlines — a time-consuming task it can complete in minutes.
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Document Drafting From motions to client letters, CoCounsel can draft legal documents grounded in research from the Westlaw database.
Pricing
CoCounsel is available as part of a Thomson Reuters enterprise subscription. Pricing is not publicly disclosed and requires a consultation.
Verdict
CoCounsel is the AI legal assistant of choice for firms already in the Thomson Reuters ecosystem. The Westlaw integration and multi-task capability (research, drafting, review in one tool) make it one of the most comprehensive AI solutions available for litigation-focused practices.
Our Verdict
CoCounsel is the best AI assistant for Westlaw users. Like Lexis+ AI for LexisNexis users, it brings AI-powered research to the database lawyers already trust, with the added benefit of GPT-4 quality generation.