What CoCounsel Legal does
CoCounsel Legal from Thomson Reuters connects AI-assisted legal research, Westlaw and Practical Law content, document analysis, drafting, and agentic workflows.
CoCounsel Legal brings research, drafting, and document analysis into one Thomson Reuters environment. Its defining advantage is access to authoritative Westlaw primary law and Practical Law guidance alongside an organization's permitted documents. Users can research issues, review or compare collections, extract contract terms, build timelines, prepare deposition material, find precedents, and modify clauses. CoCounsel Essentials focuses on drafting and analysis, while the broader Legal plan adds deep research, litigation analysis, Westlaw capabilities, and editorial enhancements.
The official in-house comparison reviewed July 15, 2026 lists CoCounsel Essentials from $340.85 per month, Practical Law Dynamic Tool Set with Essentials from $882.30, and CoCounsel Legal from $1,694.90. These are starting figures rather than universal total cost; jurisdiction, content subscriptions, users, contract terms, integrations, onboarding, and organizational requirements can change the quote. Buyers should map each needed skill to a plan and test it on representative matters. Do not pay for broad research content when the actual need is only Word-based contract review, or vice versa.
Thomson Reuters says user content and prompts are not used to train CoCounsel or third-party models, provider calls use zero retention, retention can be configured by the organization, and data is protected with TLS 1.2 and AES-256. Standard systematic hosting is in the US, with regional hosting options in the UK, Australia, and Canada. Even authoritative grounding does not guarantee a correct result: authorities can be distinguished, superseded, incomplete, or irrelevant to the facts. Lawyers must open citations, check KeyCite, confirm jurisdiction and date, and independently approve analysis and language.
How CoCounsel Legal works
A legal professional describes a task and supplies permitted documents or repositories. CoCounsel selects expert-designed skills or an agentic workflow to search authoritative Thomson Reuters material, analyze documents, compare, extract, build timelines, or draft. It returns work product with source links where applicable, while the user validates authorities, applies KeyCite and professional judgment, and controls final use.
Frame the legal assignment
State the jurisdiction, date, facts, desired work product, and permitted content sources. Choose Essentials analysis or a broader Legal research workflow according to the contracted capabilities and matter permissions.
Ground work in trusted material
CoCounsel searches permitted documents and, for eligible plans, authoritative Westlaw and Practical Law resources. It can compare, extract, summarize, build timelines, or plan multistep research with links back to supporting material.
Assemble analysis or a draft
Expert-designed skills and agentic workflows organize findings into research, tables, clauses, discovery material, or other work product. The result may be polished while still omitting a fact, exception, or adverse authority.
Check authority and professional judgment
A lawyer opens every material citation, applies KeyCite, confirms jurisdiction and facts, reviews generated language, and approves final use. Retention, access, exports, and corrections remain governed at the organization and matter level.
How to set up CoCounsel Legal
Map work to the right plan
Inventory research, Practical Law, drafting, review, litigation analysis, jurisdictions, content subscriptions, integrations, and users before comparing published starting prices.
Complete data and contract review
Confirm hosting region, retention, deletion, model providers, zero-retention calls, encryption, roles, incident terms, DMS access, support, and the final quoted commitment.
Connect trusted content safely
Configure identity, permissions, Westlaw and Practical Law entitlements, Microsoft 365 or DMS integrations, and matter-separated repositories under least privilege.
Benchmark expert-designed tasks
Test known research issues, adverse authority, KeyCite status, contract extraction, timelines, comparisons, drafting, restricted documents, and agentic workflows.
Require professional verification
Open source links, validate holdings and quotations, review every generated clause and factual inference, document corrections, and monitor performance by task type.
CoCounsel Legal FAQs
How much does CoCounsel Legal cost?
The official comparison reviewed July 15, 2026 starts Essentials at $340.85 monthly and CoCounsel Legal at $1,694.90 monthly. Actual contracts and content vary.
What is the difference between Essentials and Legal?
Essentials centers on drafting and document analysis. CoCounsel Legal adds authoritative Westlaw research, Practical Law guidance, deep research, litigation analysis, and related enhancements.
Are customer prompts used to train models?
Thomson Reuters says user prompts and content are not used to train CoCounsel or third-party models and that provider interactions use zero-retention API calls.
Where is CoCounsel data hosted?
Thomson Reuters documents US processing and hosting by default, with region-based hosting available in the UK, Australia, and Canada. Confirm exact feature flows contractually.
Do Westlaw citations eliminate hallucinations?
No. Source links improve verification, but lawyers must still open authorities, check KeyCite, confirm jurisdiction and facts, and identify omitted or adverse law.
Listing reviewed 2026-07-15. Product details and pricing can change; verify important terms on the provider's website.
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