Thomson Reuters Launches CoCounsel Legal: AI That Works Alongside Legal Professionals
On August 5, 2025, Thomson Reuters introduced CoCounsel Legal, its most advanced AI product yet, aimed squarely at legal professionals. This tool integrates agentic AI with deep legal research capabilities, starting with Westlaw content, to help lawyers delegate complex legal tasks rather than just prompt AI for answers.
Thomson Reuters leverages its unique combination of advanced AI models, authoritative legal content, and expertise from thousands of legal domain specialists. This blend enables CoCounsel Legal to deliver reliable, professional-grade AI assistance embedded directly within legal workflows.
Execution-Focused AI for Legal Work
CoCounsel Legal goes beyond simple idea generation or basic assistance. It combines legal research, workflow automation, intelligent document search, and AI-powered legal support into one unified platform. Instead of sitting on the sidelines, this AI is embedded within the work itself, driving outcomes in litigation, transactional matters, and regulatory analysis.
This approach supports enterprise-wide adoption and sets a foundation for AI integration across law firms and legal departments.
Deep Research: AI That Thinks Like a Lawyer
A key feature of CoCounsel Legal is Deep Research, grounded in Thomson Reuters’ trusted Westlaw and Practical Law content. This industry-first agentic AI research capability can:
- Generate multi-step research plans
- Trace its reasoning with transparent logic
- Deliver structured reports backed by Westlaw and Practical Law citations
Deep Research allows legal professionals to delegate full research questions to the AI. It explains its process, sources answers, and constructs argument foundations, all while allowing for human oversight. This level of transparency helps lawyers maintain control and trust in AI-assisted research.
As Colleen Nihill, Chief AI & KM Officer at Morgan Lewis, notes, Deep Research’s ability to reason through legal questions and produce structured reports makes it a valuable tool that goes beyond returning simple search results.
Guided Workflows for Complex Legal Tasks
CoCounsel Legal also includes a growing set of guided workflows—multi-step AI-driven task flows designed to tackle high-effort legal work using Westlaw and Practical Law expertise. Current and upcoming workflows include:
- Drafting a Privacy Policy
- Drafting an Employee Policy
- Drafting a Complaint
- Drafting Discovery Requests and Responses
- Deposition Transcript Review
These workflows embed legal content, apply structured reasoning, and ensure human review is built in. They help legal teams work faster without sacrificing accuracy or control. As Thomson Reuters' Chief Product Officer David Wong says, this approach moves AI from a simple tool to a collaborative teammate.
Trusted by Legal Professionals and Institutions
More than 20,000 law firms and corporate legal departments, including the majority of top US courts and Am Law 100 firms, already use CoCounsel. With this new launch, Thomson Reuters aims to set a new standard for trustworthy, explainable, and production-ready AI in legal practice.
Learn More
For additional information, Thomson Reuters provides detailed resources on Deep Research, guided workflows, and knowledge search integration within CoCounsel Legal.
Thomson Reuters continues to support professionals across legal, tax, accounting, and compliance sectors with trusted content and technology to make informed decisions and uphold justice and transparency worldwide.
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