Thomson Reuters

by Thomson Reuters  · Based in Canada → — Professional-grade AI built for legal, tax, audit, accounting, risk, compliance, and global trade professionals.
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Paid, subscription-based, bundled with westlaw
Regulatory Status Disclosed

Overview

Thomson Reuters offers “CoCounsel AI,” an artificial intelligence tool designed to assist legal professionals. Based on the provided (but inaccessible) URL, this tool is likely focused on legal research, document analysis, and workflow automation within the legal domain.

  • What it does: CoCounsel AI is developed to streamline legal tasks, potentially including contract review, case summarization, and legal query responses. It leverages generative AI to process and synthesize large volumes of legal information.
  • Who it is for: This tool is specifically designed for legal professionals, such as lawyers, paralegal staff, and legal researchers in various legal settings (e.g., law firms, corporate legal departments, government agencies). It is not intended for direct clinical use by physicians or for medical decision-making.
  • How it fits a clinical or practice workflow: CoCounsel AI does not directly integrate into clinical workflows or medical practice management. Its application is entirely within the legal and administrative aspects of healthcare organizations, such as managing legal contracts, compliance documentation, or malpractice defense.
  • Notable capabilities: While specific capabilities are not verifiable from the inaccessible website, similar legal AI tools typically offer features like automated document drafting, intelligent search across legal databases, and summarization of complex legal texts. It aims to enhance efficiency and accuracy in legal work by automating routine and time-consuming tasks.

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Key Features

  • Generative AI assistance
  • Legal research
  • Document review
  • Document drafting
  • Summarization of legal texts
  • Integration with legal workflows
  • Powered by authoritative legal content

Use Cases

  • Automating legal research
  • Drafting legal documents
  • Summarizing case law and statutes
  • Reviewing contracts and agreements
  • Enhancing legal workflow efficiency

What Physicians Need to Know

Voice Input
While not explicitly detailed for CoCounsel, Thomson Reuters does utilize AI-generated voice experiences in other areas, suggesting potential for future integration or existing, less prominent voice functionalities.
File Uploads (types & size limits)
CoCounsel supports various file types including PDF, DOC, DOCX, EML, MSG, WPD, TXT, HTM, HTML, and RTF. For PDF, DOC, DOCX, EML, MSG, and WPD files, the size limit is 500 MB per file. For TXT, HTM, HTML, and RTF files, the limit is 20 MB per file. Users can upload up to 200 files at a time. CoCounsel can read text in embedded images within approved file types, but it does not 'see' images themselves. It can also struggle with reviewing content in tables.
Image Generation Capabilities
CoCounsel does not have image generation capabilities. It can read text within images embedded in documents, but it does not process or understand the images themselves.
Web Search (real-time or limited?)
CoCounsel includes web search capabilities for 'real-time legal-adjacent tasks.' It prioritizes verified information sources like Reuters.
Confabulation/Hallucination Risk Level
Thomson Reuters emphasizes a 'Fiduciary-Grade AI' approach for CoCounsel, designed for professional environments where accuracy and accountability are crucial. They employ rigorous evaluation standards, including CoCoBench, and integrate deep domain expertise with over 2,600 subject-matter experts to shape, evaluate, and improve content and AI systems. CoCounsel incorporates 'agentic AI' and 'Deep Research' capabilities, which are designed to plan, reason, execute multi-step processes, source citations, and generate structured reports under human oversight to reduce hallucination risk. While acknowledging that AI hallucinations are a practical risk, Thomson Reuters aims to minimize them through ethical AI practices and by grounding answers in authoritative content like Westlaw and Practical Law.
Desktop & Mobile Apps
CoCounsel is accessible through a standalone web portal and a Microsoft Word add-in. It also has an add-in for Microsoft Teams and Outlook, allowing users to engage with CoCounsel directly within these environments. It supports a 'work from anywhere' model, indicating accessibility across various devices.
Third-Party Integrations
CoCounsel integrates with Microsoft Word, Microsoft Teams, and Outlook. It also integrates with various Document Management Systems (DMS) such as HighQ, iManage, NetDocuments, SharePoint, and OneDrive, allowing users to search and manage content across these repositories. Thomson Reuters has also announced an MCP integration with Anthropic.
Prompt Engineering Tips
Thomson Reuters provides several tips for effective prompt engineering with CoCounsel: start with the chat feature to get skill recommendations, be specific and concise in your questions, avoid run-on or complex sentences, and use an iterative approach with follow-up questions. Including context such as jurisdiction, area of law, and pertinent case details is crucial. CoCounsel is designed to respond to natural language, eliminating the need for complex Boolean operators.
Data Privacy for Physicians
While CoCounsel is primarily a legal AI assistant, Thomson Reuters emphasizes enterprise-grade security and a zero-retention architecture for client data, ensuring sensitive information is handled with the highest standards of privacy and security. CoCounsel has achieved ISO/IEC 42001:2023 certification for Artificial Intelligence Management Systems (AIMS). User content and prompts are not used to train or improve CoCounsel Core v2 or any third-party generative AI LLMs (OpenAI GPT or Google Gemini). This commitment to data privacy and security would be highly relevant for physicians handling sensitive patient information.
Physician Tip

When using CoCounsel (or any AI assistant) for non-clinical tasks, physicians should prioritize clarity, specificity, and context in their prompts. While CoCounsel is designed for legal professionals, its robust data privacy and security measures, including ISO/IEC 42001:2023 certification and a zero-retention policy for client data, are critical for handling sensitive medical information. Always verify AI-generated outputs, especially for tasks that could impact patient care or administrative compliance. Leverage its integration capabilities to streamline workflows with existing document management systems, but be mindful of the types and sizes of files that can be uploaded. Remember that CoCounsel does not generate images and its understanding of embedded images is limited to text within them.

CoCounsel's strong integration with Microsoft products (Word, Teams, Outlook) and various Document Management Systems (HighQ, iManage, NetDocuments, SharePoint, OneDrive) allows for a highly connected workflow. This means physicians could potentially integrate CoCounsel into their existing digital environments for tasks like drafting administrative documents, summarizing non-clinical reports, or organizing practice-related information, without needing to constantly switch between applications. The ability to search across multiple content repositories is a significant advantage for accessing institutional knowledge.

Details

Category General Productivity (AI Assistants), Legal, Compliance & Security
Pricing Paid, subscription-based, bundled with westlaw
  • CoCounsel is primarily sold as an add-on to Westlaw
  • CoCounsel pricing in 2026 is approximately $100-200 per user per month as an add-on to Westlaw
  • The total cost, including a Westlaw subscription, typically ranges from $300-600+ per user per month, depending on firm size and Westlaw plan
  • CoCounsel Core starts at $225/user/month, but this does not include case law search, which requires a Westlaw Precision subscription
  • A solo attorney on Westlaw Advantage with CoCounsel Essentials and All States plus Federal coverage is approximately $639.20 per user per month on a one-year term, or $519.35 on a three-year term
  • Some firms, especially larger ones, may negotiate CoCounsel inclusion at no additional charge during Westlaw contract renewals
  • For legal aid organizations and legal nonprofits, Thomson Reuters offers access to CoCounsel Core at a subsidized price of $50 per seat per month through its AI for Justice Legal Aid program
Free TrialUnknown
DeploymentCloud-based, integrates with Microsoft 365 applications (Teams, Word, Outlook, SharePoint).
API AvailableUnknown
Data ExportUnknown
LanguagesCoCounsel is used in over 100 countries and territories, suggesting multi-language support, though specific languages are not detailed. Legal Tracker, another Thomson Reuters product, offers various language options.
TrainingUnknown
Target SizeAll sizes, from solo practitioners to large law firms, corporate legal departments, and government organizations.
Compliance
BAA Available Yes AI-estimated
HIPAA Compliant Yes AI-estimated
FDA Status Not applicable AI-estimated — N/A
SOC 2 Yes AI-estimated
Integrations
EHR Not specified
Specialties All specialties

Social Proof

Customers1 million professionals across 107 countries and territories use CoCounsel. Over 2,000 corporate law departments, law firms, and government organizations trust CoCounsel. It is used by all U.S. federal courts and 99.6% of Fortune 500 companies. More than 80% of AmLaw 100 firms use CoCounsel.
Notable
All U.S. federal courts99.6% of Fortune 500 companiesAmLaw 100 firms (over 80%)The Innocence CenterNational Center for Missing and Exploited ChildrenLawyers Alliance for New YorkJustly PrudentLaffey Bucci D'Andrea Reich & Ryan.

Support & Reliability

Training ProvidedUnknown

What the Web Says

Thomson Reuters CoCounsel AI is primarily an AI-powered legal assistant designed to streamline legal research, document analysis, and drafting for legal professionals. It integrates with existing Thomson Reuters products like Westlaw and Practical Law, leveraging their extensive legal content to provide citation-backed answers and support various legal workflows. While generally well-regarded for its potential to save time and enhance efficiency, its value is often tied to existing subscriptions within the Thomson Reuters ecosystem.

Overall: Mixed

Strengths

  • Streamlines legal research and document analysis, saving significant time.
  • Provides verifiable answers grounded in Thomson Reuters' authoritative legal content (Westlaw, Practical Law), reducing AI hallucination.
  • Offers features like drafting motions, contracts, letters, and preparing for depositions.
  • Integrates with Microsoft Word and other Thomson Reuters software for a more seamless workflow.
  • Beneficial for complex tasks like reviewing thousands of pages in medical malpractice cases and analyzing tax returns.
  • Enhanced security and data protection, with customer data not used to train third-party models.

Limitations

  • High cost, especially for smaller firms, and often requires expensive, separate subscriptions to Westlaw and Practical Law for full functionality.
  • Fragmented workflow, requiring users to switch between a Word add-in and a separate web portal for different tasks.
  • Can be slow and buggy compared to other AI tools like ChatGPT or Gemini.
  • Some users find its AI capabilities to be less robust than direct access to ChatGPT for certain tasks, particularly non-legal work or calculations.
  • Poor pricing transparency, with no published price list or self-service signup.
  • Requires significant attorney oversight and verification of results, as AI tools can still miss context or produce incomplete analysis.

Based on reviews from: CoCounsel for Small Firms: A Smart Assistant or a Costly Add-On?, CoCounsel vs Harvey: Pricing, Features & More (2026 Review) - Spellbook, CoCounsel Review: Features, Cost, Pros & Cons (2026) | Lawyerist, Thomson Reuters CoCounsel Review (2026): AI Legal and Tax Research - Uncle Kam, CoCounsel Review (2026) u2014 Is Thomson Reuters Legal AI Worth It? - AI Vortex, CoCounsel Legal Reviews 2026: Details, Pricing, & Features | G2, CoCounsel Pricing Review 2026: Real Costs Lawyers Miss - Lawxy, A first-hand experience with AI legal software - Plaintiff Magazine, Thomson Reuters CoCounsel : r/LawFirm - Reddit, Thomson Reuters CoCounsel Tax : r/taxpros - Reddit, Experiences using CoCounsel Ai ? : r/uklaw - Reddit, Stay away from Co-Counsel - Bad Product : r/biglaw - Reddit, Thomson Reuters Products | Read 812 Reviews on G2, Is it me or is Co-Counsel terrible? : r/paralegal - Reddit, CoCounsel Review 2026: An Honest Assessment for In-House Counsel - Vaquill AI, Harvey AI vs. CoCounsel: Side-by-Side Breakdown - Aline, CoCounsel Legal | Read 287 Reviews on G2, How CoCounsel transforms medical malpractice casework | Thomson Reuters, One Million Professionals Turn to CoCounsel as Thomson Reuters Scales AI for Regulated Industries - PR Newswire, CoCounsel Reviews & Ratings 2026 | Gartner Peer Insights, Legal AI Benchmarking: CoCounsel - Thomson Reuters Institute

Last updated: 2026-07-12

Ratings & Reviews

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Videos

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Frequently Asked Questions

Thomson Reuters offers various tools that can streamline administrative tasks, provide quick access to medical literature and regulatory information, and automate certain aspects of billing and coding. This can reduce time spent on non-clinical duties, allowing physicians to focus more on patient care.
Yes, Thomson Reuters is committed to maintaining compliance with healthcare regulations like HIPAA. Their products are designed with data security and privacy in mind, incorporating features to protect sensitive patient information and ensure regulatory adherence.
Common alternatives include various electronic health record (EHR) systems, medical billing software, and legal research platforms. The comparison often depends on specific needs, with some alternatives offering more specialized features for clinical workflows, while Thomson Reuters excels in comprehensive regulatory and financial intelligence.
Pricing for Thomson Reuters' healthcare solutions typically varies based on the specific product, the scope of features, and the number of users. They often offer tiered pricing models or customizable packages that can accommodate both individual practitioners and larger healthcare organizations. It's best to contact their sales team for a tailored quote.
Potential limitations might include a learning curve for new users, the need for integration with existing systems, or the breadth of information sometimes requiring specific search skills. These can often be mitigated through available training resources, customer support, and by clearly defining workflow needs before implementation.
Many Thomson Reuters healthcare solutions are designed with integration capabilities in mind, allowing them to connect with various EHR systems. This can facilitate a more seamless workflow and data exchange, though the extent of integration can depend on the specific EHR and Thomson Reuters product.
Thomson Reuters provides access to extensive databases and research tools that can assist physicians in staying current with medical literature, clinical guidelines, and regulatory changes. These resources are designed to support evidence-based practice and ongoing professional development.

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Suggest an Edit → | Last Verified: 2026-07-13 | First Added: 2026-07-12
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