CoCounsel is Thomson Reuters' GPT-backed legal research and drafting platform, originally Casetext before the 2023 acquisition. The product now sits at the center of Thomson Reuters' AI strategy, fully integrated with Westlaw Precision and Practical Law content libraries.
Core skills: legal research with citation-validated answers, contract analysis, deposition summarization, memo drafting, document review, and policy comparison. Deep Research mode strings together multi-step tasks under a single command, and Microsoft 365 integration brings CoCounsel into Word, Outlook, and Teams.
Best fit: Big Law firms and in-house teams already on Westlaw infrastructure. The CoCounsel + Westlaw bundle is particularly compelling for firms valuing citation integrity over standalone AI cost.
Pricing is bundled with Westlaw subscriptions — no standalone tier, which can frustrate buyers wanting clean AI cost evaluation.
CoCounsel vs Lexis+ AI is the new Westlaw vs LexisNexis. Both anchor on proprietary citation databases; the choice often follows existing research subscriptions.
