Casetext
AI legal research and drafting assistant (now part of Thomson Reuters) with CoCounsel for case analysis and brief writing.
What it does
Casetext is an AI-native legal research and drafting platform - now part of Thomson Reuters - best known for CoCounsel, one of the first GPT-4-powered AI legal assistants. CoCounsel performs substantive legal tasks: researching case law and statutes, reviewing and summarizing contracts and documents, drafting legal memos and briefs, and analyzing deposition transcripts for key facts. Unlike traditional legal research tools that return lists of cases for lawyers to read, CoCounsel synthesizes legal research and provides analysis - dramatically reducing the time attorneys spend on research and document review. Casetext's integration with Thomson Reuters gives it access to Westlaw's legal database, combining AI reasoning with the most comprehensive legal content library.
Why AI-NATIVE
Casetext is AI-native - AI-powered legal research synthesis, document analysis, and substantive legal drafting from natural language instructions are the core product architecture.
Best for
Solo practitioners use Casetext CoCounsel to access capabilities previously requiring associates - AI legal research and document review enabling one attorney to handle workloads that would otherwise require a team.
Small law firms use CoCounsel to compete with larger firms on research quality - AI synthesizing case law and drafting memos at the speed of a large firm's associate team.
Small businesses with in-house legal needs use Casetext for contract review and legal research - AI reducing external counsel dependence for routine legal analysis.
Mid-market law firms and in-house legal departments use Casetext for systematic AI-assisted legal work - document review, research, and drafting across the team with consistent quality.
Large law firms and corporate legal departments use Casetext at enterprise scale - AI handling high-volume document review, accelerating research, and drafting first passes on complex matters.
Limitations
CoCounsel's research and drafting outputs must be reviewed by a licensed attorney before use — AI can hallucinate citations or mischaracterize legal holdings, and professional responsibility requires attorney supervision of AI-generated work product.
Casetext's acquisition by Thomson Reuters means its independent roadmap has merged with Westlaw's — some users report uncertainty about standalone product development versus integration into the broader Thomson Reuters ecosystem.
Casetext's legal database and AI models are trained on US law — attorneys working in non-US jurisdictions find coverage and accuracy significantly reduced outside the US legal system.
Alternatives by segment
| If you need… | Consider instead |
|---|---|
| AI legal research and drafting | Harvey |
| Contract review AI | Luminance |
| Document review platform | Relativity |
Casetext CoCounsel from $117/month per attorney. Team plans available. Enterprise pricing negotiated through Thomson Reuters. Annual contracts. Included Westlaw access on some plans.
