CoCounsel

Toronto, Ontario, Canada  All Canada companies → — Founded 2023 (CoCounsel launched by Casetext)
Acquired

Products

CoCounsel
CoCounsel
General Productivity (AI Assistants)
CoCounsel Tax is an AI tool designed to assist legal professionals with tax-related tasks and research.

See all 1 product →

About CoCounsel

CoCounsel, developed by Thomson Reuters, is a professional-grade generative AI assistant primarily designed for legal professionals, but its underlying AI technology is also applied across other professional domains like tax, accounting, audit, risk, compliance, and global trade. For physicians, understanding CoCounsel’s capabilities in the legal and compliance space is relevant, especially when dealing with legal aspects of healthcare, such as regulatory compliance, contract review, and risk management. CoCounsel Legal, the flagship legal AI product, is engineered to reason, plan, and execute complex legal workflows, integrating legal research, drafting, intelligence, and verification. It leverages authoritative content from Westlaw and Practical Law, ensuring outputs are grounded in verified, traceable legal authority. This focus on accuracy and reliability, backed by Thomson Reuters’ Fiduciary-Grade AI™ principles, aims to provide the transparency and accountability demanded in high-stakes professional environments.

While CoCounsel itself is not a direct healthcare AI tool for patient care, its capabilities in legal and compliance can indirectly benefit physicians and healthcare organizations. For instance, it can assist legal teams within healthcare systems in navigating complex regulations, drafting and analyzing contracts with vendors or insurers, and conducting due diligence for partnerships or acquisitions. The platform’s ability to analyze large document sets, identify risks, and ensure compliance with legal and regulatory standards could be valuable for healthcare entities striving to maintain legal integrity and mitigate potential liabilities. CoCounsel’s design emphasizes agentic AI, meaning it can plan, reason, and execute multi-step tasks autonomously, moving beyond simple prompt-response interactions to orchestrate complex workflows. This allows legal professionals to move from initial research and issue analysis to generating trusted work products within a single, AI-powered environment.

Focus Areas

legal research document analysis drafting assistance workflow automation contract review regulatory compliance litigation support

Business Intelligence

TechnologyGPT-4, agentic AI, cloud-native, integrated with Westlaw and Practical Law content

What Physicians Need to Know

Legal Research
CoCounsel offers AI-assisted legal research, including 'Deep Research' which uses agentic AI to generate research plans, find relevant authority, and provide source-linked answers. It can synthesize arguments, extract issues, and summarize how authorities apply to specific fact patterns. The platform is grounded in trusted legal content from Westlaw and Practical Law.
Document Analysis
CoCounsel excels at analyzing vast quantities of legal documents quickly and accurately. Its 'Tabular Analysis' feature can review up to 10,000 documents at once, extracting facts, identifying issues, and surfacing critical findings in a filterable, sortable table. It can compare documents, identify deviations from standards, and flag risks.
Drafting Assistance
CoCounsel provides AI-powered drafting capabilities, helping legal professionals create a variety of documents, including briefs, motions, correspondence, and contracts. It can generate first drafts, refine clause language, automate redlining, and check for common drafting errors. The drafting tools integrate with Microsoft Word and leverage content from Practical Law and Westlaw.
Workflow Automation
CoCounsel streamlines legal workflows by automating repetitive tasks and managing multi-step processes. It offers 'agentic workflows' that plan and execute complex projects, such as drafting agreements or generating demand letters. The platform aims to integrate research, analysis, and drafting into a single, cohesive workflow.
Contract Review
CoCounsel enhances contract review by automating analysis, comparing contracts against established playbooks, and identifying deviations from standard policies. It can extract key terms, obligations, and risks, and suggest revised clauses for non-compliance.
Regulatory Compliance
CoCounsel assists with regulatory compliance by analyzing documents against statutory or regulatory requirements and identifying compliance gaps. It can review contracts for policy compliance, flag non-compliant clauses, and suggest revisions. The platform leverages Regulatory Intelligence from Practical Law.
Litigation Support
CoCounsel offers various litigation support tools, including preparing for witness statements, assembling timelines, drafting discovery requests, and analyzing litigation documents. It can help evaluate the merits of a case, assess potential liability, and prepare for depositions.
Key Differentiators
CoCounsel is a professional-grade generative AI assistant from Thomson Reuters, built on GPT-4 and deeply integrated with Westlaw and Practical Law content. It emphasizes 'Fiduciary-Grade AI™', ensuring explainable, traceable, and verifiable outputs grounded in authoritative content. The platform focuses on end-to-end legal workflows and agentic AI that can plan and execute multi-step tasks from a single query.
Technology Stack
CoCounsel is built on OpenAI's GPT models, specifically GPT-4, and utilizes a retrieval-augmented generation (RAG) pipeline connected to Westlaw's extensive legal database. It employs agentic AI architecture, allowing the system to plan, delegate, and orchestrate across multiple tools and content sources. Thomson Reuters is also developing its own proprietary large language model for professional use cases.
Physician Tip

While CoCounsel is primarily designed for legal professionals, physicians might find its document analysis capabilities useful for managing large volumes of medical records in legal contexts, such as medical malpractice cases. For instance, CoCounsel has been used to search through thousands of pages of medical records to find critical evidence. However, some users have noted that its AI medical summaries can be inconsistent or non-chronological, suggesting that specialized medical summary tools might be more appropriate for comprehensive medical chronologies. Physicians involved in legal disputes or regulatory compliance could potentially leverage CoCounsel's ability to review documents for policy adherence and identify key issues, though direct application to clinical practice is limited.

CoCounsel integrates seamlessly with Microsoft 365 (Word, Outlook, Teams), allowing legal professionals to work within their existing workflows. It also connects with document management systems like SharePoint, OneDrive, NetDocuments, HighQ, and iManage. Furthermore, CoCounsel is deeply integrated with Thomson Reuters' own platforms, including Westlaw and Practical Law, to provide authoritative legal content and tools.

Products by CoCounsel

1 product in the directory

CoCounsel
CoCounsel
General Productivity (AI Assistants)
CoCounsel Tax is an AI tool designed to assist legal professionals with tax-related tasks and research.

What the Web Says

CoCounsel, an AI legal assistant by Casetext (now part of Thomson Reuters), generally receives positive reviews for its ability to quickly draft legal documents, summarize information, and assist with legal research. Users appreciate its efficiency and potential to save time, though some note its limitations in complex tasks and occasional inaccuracies.

Overall: Positive

Strengths

  • Significantly speeds up legal research and document drafting.
  • Effective for summarizing lengthy legal texts and depositions.
  • User-friendly interface and ease of integration into workflows.
  • Reduces time spent on routine legal tasks, freeing up lawyers for more complex work.
  • Good for generating initial drafts and brainstorming legal arguments.
  • Responsive customer support.

Limitations

  • Can sometimes produce inaccurate or 'hallucinated' information, requiring careful verification.
  • May struggle with highly nuanced or complex legal questions.
  • Reliance on AI can lead to a lack of critical thinking if not used judiciously.
  • Some users find the pricing to be a barrier for smaller firms.
  • Limited in its ability to handle very specific or niche legal areas without human oversight.
  • Concerns about data privacy and security, though generally addressed by the company.

Based on reviews from: G2, Capterra, Reddit, Legaltech News (indirect reviews/discussions), Artificial Lawyer (indirect reviews/discussions)

Last updated: 2026-11-01

Videos

News, demos, and interviews about CoCounsel.

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Press & Coverage

thomsonreuters.com
Thomson Reuters Launches Next Generation of CoCounsel Legal, the AI Ecosystem Built for Legal Professionals
Thomson Reuters announced the general availability of the next generation of CoCounsel Legal, an agentic AI experience designed to help legal professionals with research, analysis, and drafting.
2026-08
prnewswire.com
Thomson Reuters Announces One Million Professionals Have Chosen CoCounsel, Its Professional-Grade AI Technology
Thomson Reuters announced that one million professionals across 107 countries and territories have chosen CoCounsel, highlighting a shift from AI experimentation to production in regulated industries.
2026-02
thomsonreuters.com
Thomson Reuters Launches CoCounsel Core, Legal GenAI Assistant, in Canada and Australia
Thomson Reuters expanded the availability of CoCounsel Core to Canada and Australia, marking the first international rollout of the generative AI legal assistant.
2024-02
legaldive.com
Thomson Reuters to Acquire Casetext, a Leader in AI-Powered Legal Technology
Thomson Reuters announced its agreement to acquire Casetext, the company behind CoCounsel, for $650 million, furthering its investment in AI for legal professionals.
2023-06
thomsonreuters.com
From capability to confidence: How CoCounsel is redefining legal AI
This article details CoCounsel's evolution from its launch as the first GPT-4-powered legal AI assistant in March 2023, emphasizing its integration with Thomson Reuters content and agentic AI architecture.
2026-08
thomsonreuters.com
CoCounsel Achieves ISO/IEC 42001:2023 Certification — Another Milestone in Trusted AI
CoCounsel was included in Thomson Reuters' AI Management System ISO/IEC 42001:2023 Certification, making it one of the first generative AI systems in professional services to achieve this global standard.
2025-06
youtube.com
Thomson Reuters CoCounsel: Professional-grade legal AI integrated directly into legal workflows.
This video highlights how CoCounsel integrates into existing legal workflows within platforms like Word, Westlaw, HighQ, and Practical Law, aiming to overcome barriers to AI adoption.
2025-10
youtube.com
Introducing CoCounsel Legal for Litigators
This video introduces CoCounsel Legal as an advanced AI solution for litigators, designed to complete a broad range of legal work with speed and precision, including research, document analysis, and drafting.
2025-08
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