Casetext
AI legal assistant grounded in Westlaw and Practical Law for law firms and corporate legal teams.
CoCounsel delivers unmatched accuracy for legal tasks by grounding AI in Westlaw content. For firms already in the Thomson Reuters ecosystem, it's a productivity multiplier. But the high cost and ecosystem lock-in make it a pass for smaller practices.
Verified 18d ago · liveness 70/100 · cite: rightaichoice.com/tools/casetext
- Law firms needing faster legal research with verified Westlaw content
- Corporate legal departments managing high-volume contracts
- Tax and audit professionals using CoCounsel Tax and Audit
- Government legal teams handling litigation and public records
- Solo practitioners or small firms on tight budgets without Westlaw access
- General consumer legal help or DIY document creation
- Non-legal professionals needing simple contract templates
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Skip Casetext if you are a solo practitioner or small firm without an existing Westlaw subscription or budget for multiple Thomson Reuters products.
Requires separate Westlaw and Practical Law subscriptions, adding thousands per year.
Pricing is not publicly listed, typical for enterprise legal tech. CoCounsel is a premium tool best suited for firms with budgets over $10k/year per user, including Westlaw costs. Cheaper alternatives include generic AI tools (ChatGPT, Claude) but lack legal verification; mid-range options like Lexis+ AI or Fastcase provide legal search at lower tiers.
In short
Casetext — AI legal assistant grounded in Westlaw and Practical Law for law firms and corporate legal teams. Best for Law firms needing faster legal research with verified Westlaw content, Corporate legal departments managing high-volume contracts, Tax and audit professionals using CoCounsel Tax and Audit. Paid pricing.
What's new in Casetext
Checked 16 days agoAcross the latest 2 updates: 1 feature update and 1 launch.
Introducing CoCounsel Tax and CoCounsel Audit
Launched specialized AI tools for tax research and audit workflows, integrating with ONESOURCE and other Thomson Reuters products.
Enhanced document review with AI-powered clause extraction
Improved contract analysis to automatically extract and compare clauses across multiple documents.
Viability Score
How likely is Casetext to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- AI-assisted legal research with Westlaw and Practical Law
- Document review and analysis automation
- AI-powered clause extraction for contract analysis
- Drafting guidance and template generation
- Automated due diligence and compliance
- Contract analysis with AI-powered clause extraction
- Tax research with CoCounsel Tax
- Audit workflow standardization with CoCounsel Audit
- Litigation case management tools
- Secure collaboration via HighQ
- Matter management and spend tracking
- Public records investigation with CLEAR
- Risk and fraud detection analytics
- Trade compliance with ONESOURCE Global Classification AI
- E-invoicing compliance with Pagero
About Casetext
CoCounsel, part of Thomson Reuters, is an AI-powered legal assistant that combines generative AI with trusted Westlaw and Practical Law content. Designed for law firms, corporate legal departments, tax and audit professionals, and government agencies, CoCounsel automates research, document review, due diligence, contract analysis, and drafting. Its key differentiator is grounding AI outputs in verified legal databases, improving accuracy and reliability over generic AI tools. Recent launches include CoCounsel Tax and CoCounsel Audit, specialized AI tools for tax research and audit workflows, integrating with ONESOURCE and other Thomson Reuters products. Enhanced document review now features AI-powered clause extraction for contract analysis. Tight integration with the Thomson Reuters ecosystem (HighQ, Legal Tracker, ONESOURCE) makes it ideal for teams already using these tools, but it requires subscriptions to multiple services, which can be costly for smaller firms. For firms already in the Thomson Reuters ecosystem, it's a productivity multiplier, but the high cost and ecosystem lock-in make it a pass for smaller practices.
Behind the Verdict
CoCounsel is a powerful AI legal assistant that excels where accuracy is critical, thanks to its grounding in Westlaw and Practical Law content. The recent additions of CoCounsel Tax and CoCounsel Audit show Thomson Reuters is doubling down on specialized workflows. We'd reach for this when you need reliable, citation-backed research and document analysis without hallucination risks common in general-purpose LLMs. Where it bites is pricing: you effectively need multiple subscriptions (Westlaw, Practical Law, etc.) to get the full benefit, which can add up fast for smaller firms. Compared to standalone contract analysis tools like Lexion or Ironclad, CoCounsel offers broader integration with legal research but at a higher entry cost. In practice, users report significant time savings on document review and drafting, but the learning curve for the ecosystem can be steep. If your firm already uses Thomson Reuters products, CoCounsel is a no-brainer—otherwise, evaluate whether the premium is worth it for your specific use cases.
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Real-world workflow fit
Concrete scenarios for the personas Casetext actually fits — and what changes day-one when you adopt it.
Associate needs to draft a motion for summary judgment and verify all citations
Outcome: Uses CoCounsel to research Westlaw, draft motion based on templates, and auto-generate citations, cutting drafting time by 50%.
Senior manager needs to research recent tax law changes for a client
Outcome: Uses CoCounsel Tax to search trusted sources, receive summarized insights with citations, and prepare client deliverable in half the time.
Legal team needs to review 500 contracts for compliance risks in an M&A deal
Outcome: Uses CoCounsel contract analysis to quickly extract clauses, flag risks, and generate a due diligence report, completing review in days vs weeks.
Use Cases
- Law firm conducting large-scale document review for litigation
- Corporate legal team handling contract analysis and negotiation
- Government agency preparing for trial with AI-assisted deposition prep
- Tax professional automating research and return preparation with CoCounsel Tax
- Audit team standardizing workflows with verifiable insights
- In-house counsel conducting due diligence for mergers and acquisitions
- Legal department streamlining matter management and collaboration
- Risk and compliance team using CLEAR for public records investigation
Models Under the Hood
as of 2026-07-06
Limitations
- CoCounsel requires subscriptions to Thomson Reuters services (Westlaw, Practical Law), making it cost-prohibitive for small firms.
- AI outputs rely on Westlaw's coverage, which may miss niche practice areas.
- Integration is tightest within the Thomson Reuters ecosystem, limiting flexibility for firms using other tools.
- Pricing is not publicly listed, requiring contact with sales.
as of 2026-07-02
Where the pricing makes sense
The company stage and team size where Casetext's pricing actually pencils out — and where peers do it cheaper.
Pricing is not publicly listed, typical for enterprise legal tech. CoCounsel is a premium tool best suited for firms with budgets over $10k/year per user, including Westlaw costs. Cheaper alternatives include generic AI tools (ChatGPT, Claude) but lack legal verification; mid-range options like Lexis+ AI or Fastcase provide legal search at lower tiers.
Setup time & first value
How long it actually takes to get something useful out of Casetext — broken out by persona, not the marketing-page minute.
For firms already using Thomson Reuters tools, setup is minimal—add CoCounsel to existing Westlaw or HighQ accounts. For new teams, creating accounts and configuring integrations may take 1–2 business days. Basic AI research is usable immediately; full workflow customization may require 1–2 weeks.
Switching to or from Casetext
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From Lexis+ AI: Export saved research and templates; Casetext support can assist with bulk import.
- →From Manually managed case files: Use HighQ as central hub and CoCounsel for document review automation.
- ↗To Lexis+ AI: Export research history and templates; Lexis offers migration support.
- ↗To Standalone Westlaw AI: CoCounsel features may be partially replaced by Westlaw's own AI tools.
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