CoCounsel Legal review

CoCounsel Legal ranks first because it pairs an AI assistant with the content most US litigators already trust. Thomson Reuters states that it reasons from Westlaw content, Practical Law guidance spanning over 100 jurisdictions and the firm's own documents, then builds a step-by-step plan you can inspect before it drafts. Tabular Analysis reviews up to 10,000 documents against 100 questions and returns one sortable table with every answer traced to its source, which covers much of a first-pass document review. Westlaw Brief Builder takes a brief from issue framing to argument structure while the attorney picks the arguments and validates citations. Connectors reach iManage, NetDocuments, SharePoint, Box, Smokeball and Litify, and the assistant works inside Word, Outlook and Teams. Thomson Reuters lists SOC 2 and ISO 42001 certification. The drawbacks are pricing and packaging: there is no public price, and the product sits alongside Westlaw Advantage, Westlaw Edge and CoCounsel Essentials, so ask sales which bundle you are actually buying.

Who it is for

Law firms and legal departments that already research in Westlaw

Price

See vendor pricing (USD check pending); plans sold through Thomson Reuters sales.

US price check pending. See the vendor pricing page.

Key features

• Answers and drafts grounded in Westlaw content and Practical Law guidance spanning over 100 jurisdictions
• Tabular Analysis reviews up to 10,000 documents against 100 questions in one table
• Westlaw Brief Builder structures litigation briefs from issue framing to argument
• Workspaces keep documents, templates, conversations and matter history together
• Connectors for iManage, NetDocuments, SharePoint, Box, Smokeball and Litify, plus Word, Outlook and Teams

Strengths and weaknesses

• Strength: Research is grounded in Westlaw and Practical Law rather than open web content
• Strength: Tabular Analysis handles document review at a 10,000-document scale
• Strength: A CoCounsel Legal MCP lets lawyers use it inside Claude
• Weakness: No list price is published; plans come through Thomson Reuters sales
• Weakness: Best value assumes you already pay for Westlaw
• Weakness: Advanced features are spread across several Thomson Reuters plan names

Key facts

• Content: Westlaw and Practical Law, over 100 jurisdictions
• Document review: Up to 10,000 documents against 100 questions
• Security: SOC 2 and ISO 42001 certified
• Trial: Free trial on request

Where it ranks

CoCounsel Legal is No. 1 in our Best AI Legal Tools verdict.