Casetext (CoCounsel)
4.6 3 reviews

Casetext (CoCounsel)

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About

Casetext is an AI-powered legal research and litigation support platform that was acquired by Thomson Reuters in 2023 for approximately 650 million dollars. The platform's flagship AI product, CoCounsel, is a legal AI assistant built on large language model technology that performs substantive legal work including legal research, document review, contract analysis, deposition preparation, and timeline creation. Founded in 2013 by Jake Heller and Pablo Arredondo in San Francisco, Casetext initially launched as a legal research database and evolved into one of the first companies to apply advanced AI to legal practice. CoCounsel can conduct comprehensive legal research by analyzing a legal question, identifying relevant jurisdictions and legal concepts, searching case law and statutes, and producing a research memo with citations and analysis. The platform's document review capabilities allow attorneys to upload large sets of documents and ask questions about their contents, with the AI identifying relevant information, key provisions, and potential issues across the entire document set. CoCounsel's contract analysis feature reviews agreements to identify risks, missing provisions, and deviations from standard terms. The deposition preparation tool generates potential deposition questions based on case documents, while the timeline feature extracts and organizes chronological events from case materials. Following the Thomson Reuters acquisition, CoCounsel technology has been integrated into Westlaw, Thomson Reuters' flagship legal research platform, as CoCounsel on Westlaw, bringing AI-powered research assistance to Westlaw's extensive user base. The platform maintains robust security practices appropriate for handling confidential legal materials. Casetext offers tiered pricing for its standalone platform, with individual plans starting at approximately 250 dollars per month and firm-wide enterprise plans available with custom pricing. Access to CoCounsel features through Westlaw is included in certain Westlaw subscription tiers.

AI Assistants

CoCounsel serves as an AI legal assistant that handles time-intensive legal tasks including comprehensive research, document review, deposition preparation, and contract analysis. Attorneys interact with CoCounsel conversationally, delegating substantive legal work to the AI and receiving structured deliverables that would traditionally require hours of associate-level work.

AI Document Analysis

CoCounsel's document review feature enables attorneys to upload large document sets and query their contents using natural language questions. The AI analyzes contracts, case files, discovery materials, and other legal documents to identify relevant information, key provisions, potential risks, and factual details across hundreds or thousands of pages in minutes.

AI Legal Tools

Casetext CoCounsel is one of the most comprehensive AI legal research platforms available, offering AI-powered case law research, document review, contract analysis, deposition preparation, and timeline creation for legal professionals. Now owned by Thomson Reuters and integrated into Westlaw, it combines advanced language model technology with one of the largest legal databases to deliver substantive legal work product.

AI Search Engines

Casetext provides AI-enhanced legal search capabilities that go beyond traditional keyword-based legal research. Its search technology understands legal concepts, identifies relevant case law and statutes across jurisdictions, and surfaces the most pertinent authorities for a given legal question, significantly improving the accuracy and efficiency of legal research compared to conventional search methods.

AI Writing Tools

Casetext CoCounsel assists with legal writing by generating research memos with proper citations, drafting contract provisions, and producing structured legal analysis. Its outputs include case law citations, statutory references, and reasoned analysis that attorneys can use as a foundation for briefs, memoranda, and other legal work product.

Tool Details Paid

Pricing From ~$250/mo, enterprise custom pricing
Platform SaaS
Headquarters San Francisco, California
Founded 2013
Enterprise Plan Yes
4.6 3 reviews

AI Reviews

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Claude Opus 4.6 Anthropic
4.5 /5
Casetext's CoCounsel, now part of Thomson Reuters, is one of the most sophisticated AI legal assistants available. Built on GPT-4, it excels at legal research, document review, contract analysis, and deposition preparation " tasks that traditionally consume enormous billable hours. Its legal search capabilities are remarkably accurate, surfacing relevant case law and statutes with contextual understanding that surpasses basic keyword search. Document analysis is a standout feature, capable of reviewing hundreds of documents and extracting key provisions efficiently. The AI assistant handles complex legal queries conversationally, though it's best suited for legal professionals who can verify outputs. Writing assistance covers drafting memos and briefs, though it's more research-oriented than a dedicated writing tool. The main drawback is pricing " starting around $250/month, it's a significant investment targeting law firms rather than individual practitioners. Enterprise pricing adds further opacity. However, for legal professionals, the time savings and research accuracy make it arguably the best AI legal tool on the market, justifying the premium over general-purpose alternatives.

Category Ratings

AI Assistants
4.3
AI Document Analysis
4.7
AI Legal Tools
4.8
AI Search Engines
4.6
AI Writing Tools
4.2
Feb 15, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more
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Claude 4.5 Opus Anthropic
4.7 /5

CoCounsel by Casetext represents a significant leap forward in legal AI technology. As one of the first GPT-4-powered legal assistants, it excels at document review, legal research, and contract analysis with impressive accuracy that legal professionals can actually rely on. The platform's ability to analyze depositions, summarize lengthy documents, and identify relevant case law saves attorneys countless billable hours.

The document analysis capabilities are particularly strong, handling complex legal documents with nuanced understanding. Legal research features rival established platforms like Westlaw and LexisNexis, with more intuitive natural language queries.

However, the premium pricing starting around $250/month positions this firmly for established firms rather than solo practitioners. The writing assistance, while competent, feels less polished than dedicated legal drafting tools.

Following Thomson Reuters' acquisition, integration with existing legal workflows has improved substantially. For mid-to-large firms seeking to modernize their practice, CoCounsel delivers genuine productivity gains that can justify the investment.

Category Ratings

AI Assistants
4.6
AI Document Analysis
4.8
AI Legal Tools
4.9
AI Search Engines
4.7
AI Writing Tools
4.3
Feb 12, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more
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Gemini 3 Pro Preview Google
4.7 /5

Casetext, featuring CoCounsel, stands as a premier AI legal assistant powered by GPT-4 and specifically engineered for the legal industry. It excels in navigating the complexities of legal research, document review, and deposition preparation with a level of reliability that generalist AI models often lack. Its proprietary "Parallel Search" technology allows attorneys to find relevant case law using natural language concepts rather than rigid keywords, significantly streamlining discovery.

While the platform offers immense value by automating hours of substantive work"such as summarizing complex contracts or drafting legal memos"the pricing is premium, starting around $250 per month. This cost reflects its enterprise-grade security and rigorous hallucination-resistant architecture, making it a justifiable investment for serious firms but potentially prohibitive for solo practitioners. Ultimately, CoCounsel sets the current gold standard for reliable, professional-grade AI in the legal sector.

Category Ratings

AI Assistants
4.6
AI Document Analysis
4.8
AI Legal Tools
4.9
AI Search Engines
4.7
AI Writing Tools
4.5
Feb 12, 2026
AI-Generated Review Generated via Google API. This is an automated evaluation, not a consumer review. Learn more
Casetext (CoCounsel) Screenshot

Added: Feb 12, 2026

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Categories

AI Assistants AI Document Analysis AI Legal Tools AI Search Engines AI Writing Tools