Casetext CoCounsel
Enterprise-ready
Trusted by professionals
Secure data handling
AI-powered legal research
Integrates with existing workflows
Transform professional work with industry-leading AI for legal, tax, and audit.
Last updated: Apr 15, 2026
PAID
casetext.com
Quick Answer
CoCounsel by Thomson Reuters is an AI assistant for legal, tax, and audit professionals that accelerates research, drafting, and document analysis. It integrates with platforms like Westlaw and Microsoft 365, offering secure and trustworthy AI grounded in authoritative content. Best for large law firms, tax, audit, and accounting firms. Pricing is enterprise-based, requiring contact with sales.
About Casetext CoCounsel
CoCounsel by Thomson Reuters is an AI assistant for legal, tax, and audit professionals that accelerates research, drafting, and document analysis. Built on trusted content and advanced AI, it enhances efficiency and reduces risk for organizations. Designed for enterprise use, it integrates with industry-leading platforms.
What Makes It Unique
CoCounsel offers a fluid connection to existing Thomson Reuters solutions like Westlaw and Checkpoint, understanding context and nuance across products and workflows, and is backed by authoritative content and over 1,000 AI/ML experts.
Use Cases & Target Users
Best For
Accelerating legal research for law firms
Automating tax calculations for accounting firms
Enhancing compliance reviews for corporations
Drafting legal documents efficiently
Analyzing large volumes of legal and financial data
Company Size
MEDIUM
ENTERPRISE
Fit Score
Complexity
ADVANCED
Target Team Size
LARGE_TEAM
Target Skill Level
EXPERT
Key Features
Accelerated legal research
AI-powered contract drafting
Automated tax calculations
Compliance review assistance
Document analysis and summarization
Integration with Westlaw and Practical Law
Technical Specifications
API Available
SDK Available
MCP Compatible
Open Source
Team Features
SSO/Enterprise
Webhook Support
Has Demo
Deployment:
CLOUD
Pros
- +Trusted by over 1 million users for professional-grade AI
- +Grounded in authoritative content to limit inaccuracies and bias
- +Ensures data privacy with zero-retention API calls and encryption
- +Integrates seamlessly with existing Thomson Reuters platforms and Microsoft 365
- +Developed by over 1,000 AI and machine-learning experts
- +Offers customizable data retention policies at the organizational level
Limitations
- -Not a replacement for outside counsel in high-stakes situations
- -Pricing information not publicly available, requiring direct contact with sales
- -Primarily designed for large professional organizations, not individual users
- -Requires integration with existing Thomson Reuters products for full benefit
Powered By
Base Models
GPT-4
Uses Models
GPT-4
Decision Intelligence
Best For
Accelerating legal research for law firms
Automating tax calculations for accounting firms
Enhancing compliance reviews for corporations
Drafting legal documents efficiently
Analyzing large volumes of legal and financial data
Not Ideal For
Small law practices or solo practitioners seeking low-cost solutions
General content creation or creative writing tasks
Users outside of legal, tax, or audit professions
Individuals seeking a free or self-service AI tool
Frequently Asked Questions
Your Actions
Dimension Scores
Ease of Use7/10
Output Quality8/10
Value for Money6/10
Customization5/10
Support8/10
Integration6/10
Task Scores
Legal Research
9
Contract Analysis
8
Document Drafting
8
Clause Extraction
8
Compliance Monitoring
7
Risk Assessment
7
Due Diligence
7
Regulatory Tracking
6
Trust Score
60/100
Fair
Based on 6 verified signals
Trust Signals
Verified CompanyThomson Reuters
Notable CustomersZarwin Baum, Brinks, The Mercadien Group +6
User Base10K-100K
Funding$68M
Team Size51-200
Data ResidencyUS, UK, Australia, Canada
Switching & Migration
Migration Difficulty
Significant Effort
Knowledge portal, chat, phone, email, and FAQs
Quick Stats
Company & Links