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Casetext

AI legal research from the makers of CoCounsel — case-law search, drafting, and contract review, now part of Thomson Reuters.

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Casetext is a legal-technology company best known for CoCounsel, an AI legal assistant it launched in 2023 as one of the first GPT-4-based tools aimed at practicing lawyers. Casetext started as an affordable case-law research database competing with Westlaw and LexisNexis, then pivoted around CoCounsel’s ability to research, summarize, and draft. Thomson Reuters acquired the company in 2023, and CoCounsel has since become the brand for Thomson Reuters’ generative-AI legal assistant.

The tool is designed for real legal workflows rather than open-ended chat. You can ask it to find relevant case law, review a contract for specific clauses and risks, prepare deposition outlines, summarize long records, and check a brief’s cited authority. Because it’s tied into Thomson Reuters, it draws on Westlaw’s editorially maintained case-law coverage — an advantage over standalone AI tools that lack authoritative legal databases.

Key Features

  • CoCounsel AI assistant for research, drafting, and review
  • Case-law search across US federal and state jurisdictions
  • Contract analysis to flag clauses, risks, and missing terms
  • Deposition preparation and document-review assistance
  • Brief analysis and legal-memo summarization
  • Integration with Thomson Reuters and Westlaw content

Pricing

  • CoCounsel: Subscription for individual attorneys, typically starting around $100+/month per user
  • Firm / Enterprise: Custom pricing for law firms and legal departments
  • Thomson Reuters bundles: Access packaged with Westlaw subscriptions

Best For

Attorneys, litigators, and in-house legal teams that want to compress research, contract review, and drafting time using an AI trained for legal work and backed by an authoritative case-law source.

Limitations

There’s no real free tier — pricing assumes professional use. Like all generative legal AI, outputs can contain errors or misread authority, so every result still needs attorney verification before it’s relied on. The standalone Casetext brand is also steadily folding into Thomson Reuters’ unified CoCounsel offering, which may shift naming and packaging over time.

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