Thomson Reuters CoCounsel Legal
AI legal assistant for research, drafting and contract analysis, grounded in Westlaw case law and Practical Law guidance
Overview
CoCounsel Legal is an AI legal assistant from Thomson Reuters grounded exclusively in reliable primary case law from Westlaw and practical guidance from Practical Law, offered as an add-on to the Westlaw platform. It helps lawyers conduct legal research, analyze contracts, draft documents, and identify risks in natural language. The user describes their need, the AI develops a tailored legal approach in multiple steps, and delivers polished work with verified citations. CoCounsel serves law firms of all sizes (solo to 500+ lawyers) and corporate legal teams. Thomson Reuters does not publish a public pricing grid: pricing is negotiated case-by-case and depends on the Westlaw plan chosen and firm size.
CoCounsel Legal offers no French-language interface: the tool remains exclusively English with no French support announced. No public API is available for third-party integrations: the tool integrates natively into Westlaw and Practical Law and can export to Microsoft Word. The main consideration is that CoCounsel is an add-on, not a standalone product, meaning a Westlaw license is mandatory and per-user cost adds to the base price. You must contact Thomson Reuters directly for a reliable estimate and verify generated citations before use in practice.
Our verdict
Best for law firms and corporate legal teams already Westlaw customers seeking to add an AI layer for research and contract drafting acceleration, without hallucination risk thanks to Westlaw grounding. Not for you if: you are a solo lawyer or very small firm. Custom pricing and cumulative costs make access difficult for solo practice; consider Claude or GPT-4 directly instead.