Overview
Casetext’s CoCounsel is an AI legal assistant that uses large language models and Casetext’s proprietary legal search and content to perform substantive legal work. It can draft memos, review large document sets, prepare deposition outlines, and analyze contracts, acting like a reliable virtual associate for litigators and transactional lawyers.
Pricing
CoCounsel Core (Per-User)
- CoCounsel Core, focused on document work and drafting, typically starts at around 225 USD per user per month.
- Pricing varies by volume and features, with discounts for larger law firms and multi-year commitments.
Full CoCounsel Access
- For full access to CoCounsel capabilities (research, drafting, review, analysis), total subscription costs are often quoted around 400 USD per user per month, billed annually.
- Some bundles differentiate between drafting/negotiating, litigation/advisory, and premium all-in plans.research.
Thomson Reuters Bundling
- After Casetext’s acquisition, CoCounsel is now offered as part of the Thomson Reuters CoCounsel suite, often bundled with Westlaw, Practical Law, and other TR products.legal.
- Enterprise pricing is custom and depends on firm size, practice areas, and integration with existing Thomson Reuters subscriptions.
Key Features
- AI legal research – Ask complex legal questions in natural language and get memo-style answers with citations to primary law and secondary sources.
- Document review & analysis – Review and summarize large volumes of documents, identify key clauses, and flag issues much faster than manual review.
- Deposition preparation – Generate deposition outlines, suggested questions, and issue checklists based on case facts and pleadings.
- Contract analysis & compliance – Analyze contracts for risk, missing clauses, and compliance with playbooks or checklists.research.
- Trusted content & governance – Built on Casetext’s Parallel Search and Thomson Reuters’ content, with testing and guardrails to meet professional standards.
Best Use Cases
- Litigation research & motion practice – Quickly find on‑point authorities, generate research memos, and prepare motions.
- Big-firm and boutique document review – Speed up review of productions, diligence sets, and large contracts.
- In‑house legal departments – Assist with contract review, policy checks, and internal research where resources are tight.
- Deposition and trial prep – Build outlines, issue lists, and question banks from case files and legal research.
- Legal tech-forward firms – Firms that already rely on Westlaw/Practical Law and want a tightly integrated GenAI layer.
Pros
- ✅ Built specifically for law – Trained and tuned on legal content with workflows for research, review, and drafting.
- ✅ Backed by Thomson Reuters – Combines Casetext’s innovation with TR’s content, infrastructure, and support.
- ✅ High trust and testing – Extensive internal testing and trust programs to reduce hallucinations and ensure reliable, cited answers.
- ✅ Material time savings – Can cut hours off research and document review tasks, especially in litigation and contracts.
Cons
- ❌ Expensive per-user pricing – 225–400+ USD per user per month puts it in the premium tier of legal AI tools.
- ❌ Best value for TR customers – Works optimally when bundled with other Thomson Reuters products, which increases overall spend.
- ❌ Not a full practice management solution – Focused on research and document work, not billing, matter management, or docketing.
Official Website
CoCounsel (formerly Casetext CoCounsel) – Official product page via Thomson Reuters: https://legal.thomsonreuters.com/en/products/cocounsel-legal
Release Date: CoCounsel launched in early 2023; Casetext founded in 2013 and acquired by Thomson Reuters in August 2023 for 650 million USD.
Last Updated: December 2025