CoCounsel
The industry-leading AI for professionals — Thomson Reuters' agentic legal AI assistant.
Overview
CoCounsel's biggest advantage is being backed by Thomson Reuters' editorial content and legal databases (Westlaw, Practical Law), which grounds its research and drafting outputs in vetted primary and secondary law rather than a general-purpose model working from open web data. Reported outcomes include a roughly one-third reduction in time spent on document review, research, and drafting, and 64% of surveyed users say it's helped reduce risk and errors — meaningful numbers for firms billing by the hour or trying to control malpractice exposure.
The tradeoff is pricing complexity: there are four separate plan tiers (Essentials, Westlaw Advantage, Practical Law Dynamic Tool Set, and full CoCounsel Legal), each priced by attorney count, jurisdiction coverage, and contract length, with firms over 10 attorneys needing a custom sales quote. Compared to newer legal AI entrants like Harvey, CoCounsel's edge is deep integration with Thomson Reuters' existing legal research ecosystem, but that also means much of its value is tied to whether a firm already uses (or is willing to buy into) Westlaw and Practical Law.
Key Features
Deep Research: reasons across thousands of documents to return structured legal analysis grounded in Thomson Reuters editorial content.
Agentic Workflows: end-to-end task automation for common legal workflows like drafting and document review.
Expert-Built Prompt Library: pre-built prompts for tasks like drafting a privacy policy, employee policy, complaint, or discovery request/response.
Deposition Transcript Review: AI-assisted analysis of deposition transcripts.
Westlaw & Practical Law Integration: optional add-on tiers bring primary-law research, KeyCite, and expert-created practical content into the same workflow.
Document Summaries & Timelines: automated case timelines and document summarization for litigation and transactional work.
Pricing
Starting price
From ~$639/user/mo (Westlaw Advantage w/ CoCounsel Essentials); custom for 10+ attorneys
CoCounsel Essentials: the AI assistant on its own — agentic workflows, document review, drafting, summaries, and timelines; priced via self-serve configurator for firms up to 10 attorneys.
Westlaw Advantage w/ CoCounsel Essentials: adds Westlaw primary-law research, KeyCite, and litigation tools; from ~$639/user/month (1-year term) for a solo attorney with full state and federal coverage.
Practical Law Dynamic Tool Set w/ CoCounsel Essentials: adds Practical Law's expert-created content.
CoCounsel Legal: complete access to everything; custom pricing for firms with more than 10 attorneys.
Multi-year discounts: 2-year terms save ~12%, 3-year terms save ~18%.
Disclaimer: pricing may change, confirm on Thomson Reuters' own CoCounsel pricing page before buying.
Pros
Grounded in trusted legal content: research and drafting are backed by Thomson Reuters' Westlaw and Practical Law databases, not just an LLM's general knowledge.
Deep Research capability: can reason across thousands of documents for structured legal analysis.
Measurable efficiency gains: reported ~1/3 reduction in time spent on research, review, and drafting.
Scales from solo to enterprise: self-serve pricing configurator for small firms, custom sales for firms over 10 attorneys.
Cons
Complex, tiered pricing: four separate plans with cost driven by headcount, jurisdiction, and contract term makes it hard to know the real cost upfront.
Expensive at full capability: Westlaw Advantage with CoCounsel Essentials starts around $639/user/month for a solo attorney.
Tied to Thomson Reuters ecosystem: full value depends on adopting Westlaw/Practical Law, which is a bigger commitment than a standalone AI tool.
What Makes It Unique
Unique Angle: CoCounsel's Deep Research feature and direct grounding in Thomson Reuters' editorial legal content set it apart from general-purpose legal AI tools that lack a proprietary, vetted legal database to reason over.
Kay Score
8
/ 10
Tool Information
Pricing
From ~$639/user/mo (Westlaw Advantage w/ CoCounsel Essentials); custom for 10+ attorneys
Category
Research & Productivity
Platform
Web / iOS / Android
Last Updated
