CaseText CoCounsel is an LLM-powered legal research assistant for litigation teams, acquired by Thomson Reuters in 2023 and integrated into the Westlaw ecosystem.
Why it matters
Stork’s verdict on CaseText CoCounsel
CaseText CoCounsel reviewed by Stork AI · stork.ai/en/casetext-cocounsel
overview
CaseText CoCounsel is an LLM-powered legal research assistant tool developed by Casetext (acquired by Thomson Reuters) that enables legal professionals and litigation teams to automate and streamline various time-intensive legal tasks. It was initially launched in March 2023 and has since been integrated into the Westlaw ecosystem, leveraging advanced AI to understand natural language instructions for substantive legal work.
features
CaseText CoCounsel leverages a multi-model AI architecture to perform a wide array of substantive legal tasks, enhancing efficiency and accuracy for legal professionals. Its capabilities are designed to address common challenges in legal practice.
use cases
CaseText CoCounsel is primarily designed for legal professionals and litigation teams within law firms and in-house legal departments who require advanced AI assistance for their daily workflows. Its integration with the Westlaw ecosystem targets users already familiar with Thomson Reuters products.
how to use
CaseText CoCounsel is accessed primarily through its deep integration with Westlaw Precision and other Thomson Reuters products, as well as Microsoft 365. Users interact with the AI through natural language prompts to initiate various legal tasks.
pricing
CaseText CoCounsel operates on a paid subscription model, primarily integrated into Thomson Reuters' Westlaw ecosystem. Specific pricing details are typically provided upon inquiry to Thomson Reuters, often bundled with Westlaw Precision subscriptions. The original standalone Casetext product was officially retired on April 1, 2025, with its technology absorbed into Westlaw offerings, which generally entails a higher price point than Casetext's initial standalone services.
Similar Tools
CaseText CoCounsel competes in the AI legal assistant market with several established and emerging platforms, each offering distinct features and targeting specific segments of the legal industry.
Leverages LexisNexis's extensive and authoritative legal database with advanced AI for conversational search, summarization, and drafting, integrated with Shepard's Citations.
Similar to CoCounsel's integration with Westlaw, Lexis+ AI is built into the Lexis+ platform, providing AI capabilities within an existing, comprehensive legal research ecosystem. It offers comparable features for legal research, summarization, and drafting, targeting a similar audience of legal professionals and firms.
Specializes in providing custom-trained LLMs for law firms and in-house legal teams, excelling in drafting, document review, and complex legal reasoning.
Harvey AI focuses on deep integration and customization with a firm's proprietary documents, offering a more tailored AI experience compared to CoCounsel's broader integration with Westlaw content. It targets large law firms and enterprise legal departments.
Offers AI-powered legal research across a vast global database covering over 100 countries, with specialized workflows for multi-jurisdictional analysis and litigation intelligence.
While CoCounsel is deeply integrated with Westlaw's US-centric content, vLex Vincent AI stands out with its extensive international and multi-jurisdictional coverage, making it a strong alternative for firms with global or diverse geographic legal needs.
Built specifically for US litigators, offering unique tools for trial preparation, medical chronology, and courtroom assistance beyond standard legal research.
NexLaw directly targets solo and small-firm litigators with specialized trial preparation and medical chronology features that CoCounsel (integrated with Westlaw) does not explicitly highlight as core offerings, providing a more focused litigation workflow.
Provides sophisticated legal research and document drafting with a focus on accessibility and intuitive design for solo practitioners and small law firms.
Paxton AI is often cited as a direct alternative to Casetext's original AI-powered legal research approach, offering similar features like natural language queries and cited case law, but at a potentially more accessible price point for smaller firms compared to the enterprise-focused CoCounsel/Westlaw.
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