CaseText is the legal AI pioneer that built CoCounsel — one of the first and most capable AI legal assistants. Acquired by Thomson Reuters in 2023 for $650 million, CaseText's technology now powers CoCounsel, which is available as a standalone product and increasingly integrated into Westlaw.
CoCounsel can conduct legal research, review and summarise documents, prepare deposition outlines, identify relevant contract clauses and draft legal memos — tasks that previously required hours of associate time. It was the first legal AI tool to demonstrate GPT-4 level capability on real legal tasks.
The Thomson Reuters acquisition means CoCounsel now has access to Westlaw's massive legal database, combining the AI capabilities CaseText pioneered with the most trusted legal research platform in the world.
Key Features
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Legal Research
Conducts thorough legal research and produces cited memos — grounded in Westlaw's verified database post-acquisition.
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Contract Review
Reviews contracts against your criteria — identifies relevant clauses, flags issues and summarises key terms.
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Deposition Prep
Generates deposition outlines and question sets based on case documents and legal strategy.
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Memo Drafting
Drafts research memos with full citations — ready to review and refine rather than starting from scratch.
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Document Review
Processes large document sets — identifies relevant documents and extracts key information quickly.
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Case Analysis
Analyses cases, identifies strengths and weaknesses and surfaces relevant precedents automatically.
Pros & Cons
What we love
Pioneer in legal AI — battle-tested technology
Deposition prep is uniquely valuable
Now backed by Thomson Reuters/Westlaw database
Handles research AND transactional work
Strong accuracy on legal tasks
Watch out for
Pricing less transparent post-acquisition
Integration with Westlaw still maturing
Some overlap with Westlaw Precision features
Frequently Asked Questions
CaseText built CoCounsel as its AI legal assistant product. After Thomson Reuters acquired CaseText in 2023, CoCounsel became the branded name for the AI assistant — available both as a standalone product and increasingly integrated into Westlaw. If you see references to CoCounsel AI, that's the CaseText technology rebranded under Thomson Reuters.
CoCounsel (CaseText) and Harvey are the two most discussed enterprise legal AI tools. CoCounsel has an edge for research-heavy work given its Westlaw integration and is more accessible in pricing. Harvey is stronger for complex transactional work and custom enterprise deployments at the largest firms. Many litigators prefer CoCounsel; corporate lawyers often lean toward Harvey.
CoCounsel is available through Thomson Reuters — contact their sales team for current pricing and access options. It can be accessed as a standalone product or as part of a Westlaw subscription. Pricing is based on firm size and usage volume.
One of the most capable legal AI assistants available — CoCounsel does research, contract review and deposition prep with impressive accuracy and speed.
Quick Facts
Best forLaw firms, litigators, corporate lawyers
PricingContact Thomson Reuters
Free trialDemo available
Founded2013 · Acquired by Thomson Reuters 2023
Try CaseText
CaseText's CoCounsel AI assistant does legal research, contract review and deposition prep — acquired by Thomson Reuters in 2023.