CoCounsel is an AI legal assistant from Thomson Reuters. It handles legal research, document analysis, drafting, and contract review grounded in Westlaw and Practical Law. Moreover, it offers agentic Deep Research and guided multi-step workflows for litigation and policy tasks. As a result, it is a top choice for firms that rely on authoritative legal databases in 2026.
Key Features
CoCounsel has a full legal AI stack built on Thomson Reuters content. First, it runs AI-assisted research across Westlaw case law, statutes, and Practical Law guidance. Second, it drafts litigation documents, transactional agreements, and memos with source-linked citations. Then, it reviews uploaded contracts and discovery materials for risks and inconsistencies. In addition, it executes Deep Research that plans, searches, evaluates authority, and synthesizes findings across thousands of documents. Furthermore, it runs agentic guided workflows for complaints, discovery requests, deposition review, and policy drafts. Plus, it searches across a firm’s internal knowledge graph and uploaded documents. So it fits practices that need research depth with verifiable authority.
Pricing Plans
CoCounsel uses enterprise-only pricing with no public tiers. The estimated base rate is roughly $225 per user per month for firms with existing Thomson Reuters relationships. Volume discounts apply for large deployments. So costs vary by firm size, Westlaw bundle status, and seat count.
Who Uses CoCounsel?
CoCounsel fits law firms and corporate legal teams that run on Thomson Reuters. For instance, a litigation practice can draft complaints and review deposition transcripts with guided workflows. Similarly, a regulatory team can run multi-state surveys using Deep Research in hours. In contrast, a solo practitioner may find the Westlaw bundle requirement costly. But midsize firms can replace hours of manual research with citation-backed analysis. So it fits practices that prioritize authoritative sources and research depth.
How CoCounsel Compares
CoCounsel wins on research depth and Westlaw integration for legal work. First, it grounds answers in Westlaw and Practical Law, while Harvey uses a proprietary knowledge engine. Second, it offers Deep Research that plans and reasons across thousands of documents, which Spellbook lacks. However, Harvey offers custom model fine-tuning for firm-specific workflows that CoCounsel does not match. Also, CoCounsel requires a Thomson Reuters relationship, while Legora works better for European data residency. Explore our full directory or read our Harvey review for enterprise legal AI. For updates, visit CoCounsel-Ai.
Best For
CoCounsel fits law firms and legal teams who need AI research, drafting, and document review grounded in authoritative legal databases. It offers Deep Research, agentic workflows, and Westlaw integration for defensible legal work.
