CoCounsel Legal

CoCounsel Legal is an AI legal assistant from Thomson Reuters that researches, analyzes documents and drafts work product for law firms, corporate legal departments and government lawyers. Its main difference from general-purpose AI is the content underneath: answers are grounded in Westlaw case law and Practical Law guidance, with citations a lawyer can click through and check.

What is CoCounsel Legal used for?

Lawyers use CoCounsel Legal for the research and first-draft work that used to fall to junior associates. You describe the task, it proposes a plan, and you can inspect its reasoning before relying on the output.

• Researching a legal question and getting a cited answer drawn from Westlaw
• Drafting memos, briefs and client communications from a single request
• Building litigation briefs with Westlaw Brief Builder, from issue framing to argument structure
• Reviewing up to 10,000 documents against 100 questions with Tabular Analysis
• Keeping documents, templates and conversations together in matter Workspaces
• Working from Microsoft Word, Outlook or Teams, or through an MCP connection in Claude

Who CoCounsel Legal is best for

CoCounsel Legal suits litigators and transactional lawyers who already rely on Westlaw and Practical Law and want AI that speaks the same language as their research tools. Thomson Reuters offers plans for law firms, corporations and government. Solo lawyers looking for a low monthly price, or teams that do not use Thomson Reuters content, may find the bundle more than they need.

CoCounsel Legal pricing

As of October 2026, Thomson Reuters does not list a public price for CoCounsel Legal. The plans page describes the full CoCounsel Legal experience as including Westlaw Advantage, Practical Law Dynamic Tool Set and CoCounsel Essentials, and it routes law firms, corporations and government buyers to a sales representative. You can request a free trial or a free demo from the product page. Expect pricing to depend on organization size and which Thomson Reuters products are bundled.

Limitations to keep in mind

• No self-serve price, so comparing cost against rivals requires a sales conversation
• Much of the value comes from Westlaw and Practical Law, which raises the total cost if you do not already subscribe
• AI-drafted briefs and memos still need attorney review of facts, arguments and citations
• The broader Thomson Reuters product range can make it hard to tell which bundle you need

CoCounsel Legal vs alternatives

Harvey is the closest rival at large firms and is often chosen by teams that want a flexible platform for both litigation and deal work, independent of a research publisher. Legora competes on collaborative document review and workflow building. AI Lawyer targets individuals and small practices with simpler, cheaper drafting help. ChatGPT can explain legal concepts quickly but does not cite Westlaw authority and is not built for privileged matter files. CoCounsel Legal wins for firms whose research already runs on Westlaw and who want citations they can verify against it.

Tips for getting started with CoCounsel Legal

Start with a research question you have already answered yourself, so you can compare CoCounsel's cited answer with your own work. Connect your document management system early, since Workspaces are more useful when prior matter files are available. For large reviews, write Tabular Analysis questions narrowly, such as whether a contract contains a change of control clause, so answers are easy to sort and verify.

CoCounsel Legal FAQ

Is CoCounsel Legal free?

No. CoCounsel Legal is a paid Thomson Reuters product with quote-based pricing, though you can request a free trial or demo from the official product page.

What is CoCounsel Legal used for?

CoCounsel Legal is used for legal research, document analysis and drafting, with answers grounded in Westlaw, Practical Law and your organization's own documents.

Does CoCounsel Legal work in Microsoft Word?

Yes. Thomson Reuters says CoCounsel Legal works inside Microsoft Word, Outlook and Teams, and connects to iManage, NetDocuments, SharePoint and Box.

CoCounsel Legal vs Harvey: which is better?

CoCounsel Legal is the stronger pick if your firm relies on Westlaw research, while Harvey suits large firms wanting a broad legal AI platform not tied to one publisher.