CoCounsel
by Thomson Reuters
CoCounsel from Thomson Reuters combines agentic legal workflows with Westlaw-grounded research. Used by 20,000+ firms including the majority of Am Law 100. Subscription pricing varies.
CoCounsel is Thomson Reuters' agentic legal AI platform, originally developed by Casetext and acquired in 2023. The current product (CoCounsel Legal, launched 2025) combines pre-built legal workflows with Deep Research, an agentic system that creates research plans, executes them iteratively, and delivers reports grounded in Westlaw's proprietary content. Capabilities include legal research, document drafting (privacy policies, employee policies, complaints, discovery requests), deposition transcript review, and federated search across law firm document management systems. Customer base spans 20,000+ law firms and corporate legal departments, including the majority of Am Law 100 firms, top US courts, 100% of Fortune 100 companies, and 97% of Fortune 1000. Pricing is subscription-based, typically bundled with Westlaw Precision; per third-party reference (Maryland State Bar Association), a one-attorney Maryland one-year contract for Westlaw Precision with CoCounsel runs $428/month. Actual rates vary by jurisdiction, headcount, and contract length. Setup is professional-services-led for larger firms; smaller firms can self-onboard in 1-2 weeks. User prompts and data are not used to train models. Strong fit for firms already in the Westlaw ecosystem who want unified AI research, drafting, and document analysis.
Pricing
subscription · $428
Segment
enterprise
Setup
moderate
Verified
May 8, 2026
Capabilities
Pros & Limitations
Editorial assessmentPros
- ✓Grounded in Westlaw -- research outputs cite authoritative primary sources rather than open-web content
- ✓Deep Research agentic capability handles multi-step research workflows that previously required hours of attorney time
- ✓20,000+ active customers and Am Law 100 majority adoption signals enterprise-grade reliability
Limitations
- ⚠Pricing visibility limited unless you're already a Westlaw customer or willing to engage sales
- ⚠Bundling with Westlaw means some buyers pay for legal research infrastructure they may not need
- ⚠Workflow library is pre-built; custom workflows are still rolling out incrementally
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