Casetext CoCounsel
Discontinued Last verified: September 2026Thomson Reuters's GPT-4 legal assistant for research, review, deposition prep, and contract analysis. Discontinued in 2026; casetext.com returns a notice that the service is no longer available.
What is Casetext CoCounsel?
Casetext has shut down: casetext.com returns a notice that the service is no longer available, directing legal research to Westlaw and legal AI to CoCounsel. What follows records the product as Casetext sold it; CoCounsel itself continues under Thomson Reuters. Casetext CoCounsel was an AI legal assistant that Thomson Reuters acquired for $650 million in 2023. Built on GPT-4 and trained for legal tasks, CoCounsel was one of the first generative AI products in the legal market and is now deeply integrated into Thomson Reuters's legal research and practical law ecosystem. Lawyers use CoCounsel for legal research, document review, deposition preparation, contract analysis, summarization, and drafting. It sits across Thomson Reuters's platforms, including Westlaw, Practical Law, and standalone CoCounsel, and can pull authoritative legal content from the Thomson Reuters corpus as grounding for AI answers. CoCounsel's selling points are its early mover advantage, trusted Thomson Reuters content, strong research workflows, and a user experience built around specific legal tasks rather than a generic chat interface. Post-acquisition, Thomson Reuters has continued investing heavily in CoCounsel, adding new skills, tighter Westlaw integration, and enterprise controls for mid-size and large firms. CoCounsel is sold through enterprise Thomson Reuters sales, bundled with Westlaw and Practical Law for most firms, and priced per lawyer per month or as part of broader Thomson Reuters contracts.
Casetext CoCounsel demo video
Watch Casetext's official demo to see Casetext CoCounsel in action before reading our full review.
Official video by Casetext via YouTube, embedded for reference. ToolChase does not host or claim this video.
⚡ Quick Verdict
Firms already on Westlaw and Practical Law that want a legal AI assistant grounded in Thomson Reuters content
Firms on LexisNexis or solo practitioners on tight budgets
Discontinued 2026. Historically: enterprise per-lawyer subscription · often bundled with Westlaw
Casetext signups are closed. Historically none, Thomson Reuters enterprise sales only
Thomson Reuters content grounding and mature skill library
Most valuable only inside the Thomson Reuters ecosystem
Bottom line: CoCounsel scored 4.4/5, one of the top enterprise legal AI assistants, particularly strong for firms already invested in Westlaw and the broader Thomson Reuters stack, but Casetext itself has shut down and casetext.com now returns a notice that the service is no longer available.
Pricing
Discontinued, historical record. Casetext no longer sells CoCounsel, and nothing below can be purchased from Casetext. Verified 11 August 2026: casetext.com/pricing and casetext.com/cocounsel return HTTP 410 Gone with a notice that, per Casetext, "This service is no longer available", directing legal research to Westlaw and legal AI to CoCounsel. The apex casetext.com path answers with an HTTP 403 bot challenge rather than that 410 notice. The product survives only as Thomson Reuters CoCounsel at legal.thomsonreuters.com, which still publishes no list price and routes buyers to sales, so the ranges below remain third party estimates rather than vendor pricing.
Contact sales, historical: Thomson Reuters did not publish a standard price for CoCounsel. It was sold to law firms as a per-lawyer subscription, often bundled with Westlaw Edge and Practical Law contracts. Industry reports placed CoCounsel pricing in the range of roughly $225-$500 per lawyer per month depending on scope, volume, and bundling, though exact rates were negotiated firm by firm.
Bundled contracts, historical: Most Am Law and mid-size firms bought CoCounsel as part of a broader Thomson Reuters agreement that included Westlaw, Practical Law, and supporting tools.
Trials, historical: Demos and pilots were available through Thomson Reuters sales. There was no self-serve free tier.
Key Features
- GPT-4 powered legal assistant with task-specific skills
- Legal research grounded in Westlaw and Thomson Reuters content
- Document review, contract analysis, and deposition prep skills
- Memo and brief summarization
- Deep Westlaw and Practical Law integrations
- Enterprise controls and access management
- SOC 2 Type II and enterprise security posture
- Ongoing skill library maintained by Thomson Reuters
Pros & Cons
Pros
- Early-mover generative AI product with a mature skill library
- Grounded in authoritative Thomson Reuters legal content
- Tight integration with Westlaw and Practical Law
- Backed by Thomson Reuters's enterprise sales and support
Cons
- Premium pricing, especially outside the Thomson Reuters bundle
- Best value requires a broader Thomson Reuters subscription
- Competitive pressure from Harvey and LexisNexis AI
FAQ
What is CoCounsel?
CoCounsel is an AI legal assistant originally built by Casetext on top of GPT-4 and now owned by Thomson Reuters. It provides task-specific legal skills, legal research, document review, contract analysis, deposition preparation, summarization, and drafting, rather than a generic chat experience. It is grounded in Thomson Reuters's legal content, including Westlaw and Practical Law, which makes its answers more authoritative than pure foundation-model outputs.
Is CoCounsel the same as Westlaw?
No, but they are increasingly integrated. Westlaw is Thomson Reuters's primary legal research platform with an enormous database of case law, statutes, regulations, and secondary sources. CoCounsel is the AI assistant layer that can read Westlaw content, answer questions, summarize authorities, and perform document review tasks. Since the Thomson Reuters acquisition, the two products have been aligned and many firms buy them together as part of a single contract.
Who owns Casetext now?
Thomson Reuters acquired Casetext in August 2023 for approximately $650 million. Since then, CoCounsel has been integrated with Thomson Reuters's legal research and practical law platforms and is sold through Thomson Reuters's enterprise sales force. The acquisition was one of the largest legal tech deals in history and cemented Thomson Reuters's position as a serious player in generative AI for the legal profession. Casetext's own site has since shut down: casetext.com returns a notice that the service is no longer available, directing legal research to Westlaw and legal AI to CoCounsel.
How much does CoCounsel cost?
It can no longer be bought from Casetext, which has shut down. Thomson Reuters does not publish CoCounsel pricing. Industry reports placed it in the ballpark of $225-$500 per lawyer per month depending on bundling and firm size, and those figures are third party estimates rather than vendor rates. Most mid-size and large firms bought CoCounsel as part of a broader Westlaw and Practical Law subscription, which often made the incremental cost of adding AI features more palatable than standalone pricing would suggest.
Is CoCounsel secure for client work?
Yes. CoCounsel is SOC 2 Type II compliant and backed by Thomson Reuters's enterprise security and legal risk infrastructure. It does not train its base models on customer data, supports access controls, and signs enterprise agreements appropriate for privileged and confidential client matters. Large law firms have completed security reviews and deployed CoCounsel across hundreds or thousands of lawyers without incident.
CoCounsel vs Harvey, which is better?
Harvey is positioned as the premium enterprise AI workflow platform for large law firms and professional services. CoCounsel leads on legal research grounded in Thomson Reuters content and a mature library of specific skills. Firms often use both: Harvey for broad workflow automation and drafting, CoCounsel for research and Westlaw-backed answers. For firms already standardized on Thomson Reuters, CoCounsel tends to be the natural first AI investment.
📋 Good to know
No longer applicable. Casetext has shut down and casetext.com returns a notice that the service is no longer available. Historically you contacted Casetext CoCounsel sales for a demo and pilot, and enterprise deployments included integration and training.
Enterprise security posture with BAAs or DPAs as appropriate. SOC 2 / HIPAA / GDPR coverage depending on product.
No longer applicable through Casetext. Firms already on Westlaw and Practical Law that want a legal AI assistant grounded in Thomson Reuters content now buy CoCounsel from Thomson Reuters.
Enterprise-grade training and onboarding typically included in contracts.
