CoCounsel Legal Review: Features, Pricing & Alternatives

What is CoCounsel Legal?

CoCounsel Legal is Thomson Reuters’ AI assistant for lawyers. It combines deep legal research grounded in Westlaw and Practical Law with drafting, document review and guided multi-step workflows. Lawyers can ask a research question, review large sets of documents against a list of questions, or build a brief, with answers linked back to authority. It is sold to law firms, corporate legal departments and government users.

CoCounsel began life at legal research company Casetext, which launched it in March 2023. Thomson Reuters acquired Casetext later in 2023 and folded CoCounsel into Westlaw and Practical Law. In August 2025 it launched CoCounsel Legal with agentic workflows and Deep Research. In March 2026 Thomson Reuters announced a next-generation version rebuilt with Anthropic’s Claude Agent SDK, with US beta testing first and general availability planned later in 2026.

CoCounsel’s main advantage is content. Because it sits on Westlaw and Practical Law, research answers can draw on cases, statutes and expert practice notes rather than the open web. It connects to iManage, NetDocuments and SharePoint, works in Word, Outlook and Teams, and holds SOC 2 and ISO 42001 certification. Thomson Reuters says customer data is not used to train models. It does not replace legal advice.

Key features of CoCounsel Legal

• Deep ResearchRuns multi-step research across Westlaw and Practical Law and returns a cited report.
• Agentic workflowsGuided workflows break complex drafting and review tasks into steps.
• Westlaw Brief BuilderHelps litigators assemble a brief from research, with supporting authority attached.
• Tabular AnalysisReviews up to 10,000 documents against up to 100 questions and presents results in a table.
• WorkspacesKeeps matter context across sessions so you do not re-upload documents.
• IntegrationsConnects to iManage, NetDocuments, SharePoint, HighQ and Box, and works in Word, Outlook and Teams.

Who is CoCounsel Legal best for?

• Litigators who need research grounded in case law and help building briefs.
• Firms already on Westlaw or Practical Law that want AI tied to content they already pay for.
• Corporate legal departments that review large document sets for investigations or contracts.

Popular ways to use CoCounsel Legal

• Legal research: get a cited research memo on a jurisdiction-specific question.
• Brief drafting: build a litigation brief with Westlaw authority attached.
• Document review: run 100 questions across thousands of contracts or discovery files.
• Deposition prep: summarise transcripts and pull key admissions.
• Practice guidance: combine Practical Law notes with your own documents for transactional work.

CoCounsel Legal pricing (October 2026)

Thomson Reuters does not publish a single price list; most quotes depend on firm size, content and term length, and longer 2- and 3-year terms cost less per year. Online sign-up is limited to smaller firms.

CoCounsel Legal pros and cons

How to get started with CoCounsel Legal

1. Visit the CoCounsel Legal plans page and enter your firm size and role.
2. Small firms can buy a bundle online; larger firms should book a demo with sales.
3. Connect your document management system, such as iManage or SharePoint.
4. Run a research question you already know the answer to and check every citation.

Tips to get better results from CoCounsel Legal

• Include the jurisdiction and time period in research questions.
• Use Workspaces for each matter so context carries between sessions.
• Click through to the underlying Westlaw authority before citing anything in a filing.
• Compare 1-year and multi-year terms before signing.

CoCounsel Legal vs alternatives

CoCounsel’s closest rival is Lexis+ with Protégé, which offers a similar mix of research, drafting and workflows on top of LexisNexis content. Most firms choose based on which research service they already use. Harvey competes at the large-firm end with a broader agent platform but without its own case law library.

For contract-heavy teams, Spellbook and Luminance focus on drafting and negotiation rather than research. Small firms that mainly need practice management help may prefer Clio Duo. See all best AI legal and finance tools.

Our verdict: is CoCounsel Legal worth it?

CoCounsel Legal FAQs

Pricing and features change often. Details on this page were last reviewed in October 2026. Always confirm current plans on the official CoCounsel Legal website.