Thomson Reuters CoCounsel — AI Legal Research Built on Westlaw
An AI assistant for legal research, contract review, deposition prep, and drafting, designed for mid-size and large firms with active research workflows and existing Thomson Reuters relationships.
Takes 5 minutes. No commitment.
30 minutes. No sales pitch.
What CoCounsel Does
AI Research Assistance Integrated With Westlaw
Thomson Reuters CoCounsel is an AI-powered legal research and drafting assistant that sits on top of the Westlaw platform. It is designed to accelerate specific attorney workflows: answering legal research questions using case law and statutes, reviewing and summarizing contracts, analyzing documents for deposition preparation, and assisting with drafting tasks.
CoCounsel is positioned for firms where attorneys are spending material time on research-intensive work: mid-size practices, litigation departments, in-house legal teams running contract volume. For these firms, the promise is faster throughput on tasks that are high-skill but repetitive: initial case law sweeps, contract clause analysis, document review for depositions.
CoCounsel is not a practice management platform, billing tool, or intake system. It operates in the legal research and drafting layer of a firm's workflow, distinct from where platforms like Clio, Filevine, or Lawmatics sit.
How CoCounsel Fits in the Stack
AI Research Layer — Not Practice Management
Understanding where CoCounsel sits in a firm's technology stack matters before evaluating it. It addresses a different problem than practice management, intake, or billing tools:
CoCounsel addresses the AI Research layer. A firm evaluating it should have the lower stack layers covered first.
A Reasonable Fit When
Mid-size or large firm with an active Westlaw subscription looking to accelerate research workflows, contract analysis, or deposition prep through AI assistance.
Likely Not the Right Fit When
Solo or small firm without a Westlaw subscription. Firms primarily needing practice management, intake, or billing tools rather than AI legal research.
Songbird's Role With CoCounsel
Evaluation Support — No Commercial Relationship
Songbird Strategies has no commercial relationship with Thomson Reuters. Our depth with CoCounsel is evaluation and advisory support. We include CoCounsel because it is one of the major AI legal research tools and relevant context when helping a firm think through its full technology stack, particularly where AI capabilities are part of the picture.
Our primary focus is practice management, intake automation, and legal operations tooling. If a firm we are working with is evaluating AI research tools as part of a broader stack conversation, we can provide context on fit, help compare CoCounsel against Lexis+ AI, and support the adoption decision, based on publicly available product information and market positioning.
Comparing CoCounsel alongside other legal AI tools? See the Legal AI Matrix →
Evaluating Your Full Tech Stack?
The free Intake Audit takes 5 minutes. We assess where your firm is losing time and revenue, and tell you which tools (practice management, intake, AI research) belong in your stack at your current stage.
Also evaluating LexisNexis? See our Lexis+ AI overview →
Frequently Asked Questions
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CoCounsel is part of Thomson Reuters' product suite and is most tightly integrated with Westlaw. While the exact subscription bundling has evolved, mid-size and large firms evaluating CoCounsel will typically be doing so in the context of an existing Thomson Reuters relationship. If you do not currently subscribe to Westlaw, the value proposition shifts. You would be evaluating CoCounsel as a standalone AI tool rather than as an extension of a research platform you already use. We would factor this into any fit assessment.
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Based on publicly available product documentation and market positioning, CoCounsel is designed for: legal research questions (case law, statutes, secondary sources), contract review and analysis, document review and deposition preparation, and drafting assistance. These are accelerated workflows, and the tool is designed to help attorneys move faster through research and review tasks, not to replace attorney judgment on strategy or output.
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Generally not as a primary technology investment. CoCounsel is positioned for mid-size and large firms with active research workflows, where attorneys are spending significant time on case law research, contract review, or deposition prep. Solo and small firms whose primary needs are practice management, billing, and intake are better served evaluating those categories first. If you are a solo attorney doing significant research-intensive work and already subscribe to Westlaw, it may be worth evaluating — but it is not where we typically direct small firm conversations.
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Both are AI research tools from major legal publishers: Thomson Reuters (CoCounsel/Westlaw) and LexisNexis (<a href="/platforms/lexis-plus" style="color: var(--color-azure);">Lexis+ AI</a> with Protégé). The core difference is platform allegiance: CoCounsel is built around the Westlaw database; Lexis+ AI extends the LexisNexis platform. For most firms, the right choice tracks which research database they already subscribe to. If you are actively evaluating both, the practical question is usually: where does your firm's research workflow live today?
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We have no commercial relationship with Thomson Reuters, and our work with CoCounsel is evaluation and advisory support. We cover CoCounsel because it's one of the major AI legal research tools and relevant context when helping firms think through their full stack. If you're evaluating AI research tools, we can provide context on how CoCounsel compares to Lexis+ AI and help you work through the decision, based on publicly available product information.
Not Sure Where AI Research Tools Fit in Your Stack?
The Intake Audit tells you which technology investments match your firm's stage, not which ones we earn more from.
Takes 5 minutes. No commitment.
30 minutes. No sales pitch.