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CoCounsel AI screenshot

What is CoCounsel AI?

CoCounsel is an AI legal assistant developed by Thomson Reuters that helps lawyers with case research and document analysis. Built on large language models, it can read through lengthy legal documents, summarise case law, and help identify relevant precedents more quickly than manual review alone. The tool is designed for legal professionals who need to speed up research workflows without replacing human judgment. Since it's free to use, it offers a low-risk way for law firms and individual practitioners to explore AI-assisted legal work. The tool integrates with Casetext's existing legal research platform, which already provides access to court documents and legal databases.

Key Features

Case law research

quickly find relevant cases and legal precedents related to specific legal questions

Document summarisation

condense lengthy contracts, briefs, or court filings into key points

Document analysis

identify clauses, obligations, and patterns across multiple legal documents

Free access

no subscription required to use core AI features

Thomson Reuters integration

built on a major legal research platform with access to legal databases

Pros & Cons

Advantages

  • Free to use with no subscription barrier
  • Developed by an established legal publishing company with access to thorough legal data
  • Speeds up initial document review and research tasks
  • Accessible to solo practitioners and small firms who may not afford premium legal software

Limitations

  • Still an emerging tool; AI-generated summaries may occasionally misinterpret detailed legal language and should be reviewed by a qualified lawyer
  • Limited information available about how it handles highly specialised or niche practice areas
  • Dependent on Casetext's platform, so availability and features may change

Use Cases

First-pass review of large contract batches to flag key terms before detailed analysis

Quick case law summaries when researching a new legal question

Identifying patterns across multiple documents in discovery or due diligence

Solo practitioners looking to automate routine research tasks without expensive software subscriptions

Law students and researchers exploring AI tools in legal work