CoCounsel Legal

What is CoCounsel Legal?

CoCounsel Legal is a web-based legal AI assistant from Thomson Reuters. Its main purpose is to reduce the time spent on research-heavy and document-heavy legal work while keeping users in control of the final analysis and work product.

The service can work from legal questions, uploaded files, connected repositories, and selected legal authorities. Depending on the task and the customer's subscriptions, it can draw on Westlaw content, Practical Law guidance, and an organization's own documents. It then returns research summaries, cited answers, comparisons, chronologies, extracted information, or draft documents for professional review.

This makes CoCounsel different from a general-purpose assistant such as ChatGPT. Its value is not simply conversational text generation; it is the combination of legal content, document workflows, matter context, citations, and enterprise integrations.

What can legal teams use it for?

Legal research and cited answers

Users can ask legal questions and receive synthesized answers grounded in permitted Westlaw and Practical Law content. Citation and source links are important to this workflow because they give a lawyer a way to inspect the authority behind an answer rather than treating the model's response as self-validating legal advice.

Document analysis and contract work

CoCounsel can summarize, compare, classify, and extract information from contracts, pleadings, correspondence, discovery materials, and other legal documents. Teams can use it to identify provisions, compare versions, find relevant facts, and prepare review outputs.

For transactional work, it can assist with clause drafting and modification, contract review, and playbook-based analysis. Practical Law playbooks can support standardized review, and organizations may also create workflows around precedent contracts or internal guidance.

Litigation preparation

Litigation teams can use the product to analyze case documents, build fact chronologies and timelines, prepare deposition questions, identify issues, and organize material for further attorney analysis. These functions are intended to accelerate preparation rather than replace legal judgment about strategy, relevance, privilege, or accuracy.

Drafting and matter workflows

CoCounsel can produce or revise demand letters, pleadings, correspondence, contracts, and other legal work product. It can also handle multi-step objectives: a user describes a desired result, and the system plans connected actions across the available materials before returning an output for review.

Matter or project workspaces help organize documents, templates, prior work, and ongoing tasks around a particular legal matter. This is more structured than using an isolated chat session, especially when a team needs to return to the same documents and workflow.

How people access and use it

CoCounsel Legal is primarily a web application, with workflows that can extend into Microsoft Word, Outlook, and Teams. Thomson Reuters also documents connections with systems including iManage, NetDocuments, SharePoint, HighQ, Smokeball, Box, and Litify. Availability can depend on the customer's plan, subscriptions, permissions, and configuration.

The typical workflow is straightforward but still requires organizational setup. A user asks a research question or selects, uploads, or connects relevant documents. CoCounsel analyzes the permitted sources, performs the requested research or document task, and returns an answer or work product. The lawyer then checks authorities, facts, citations, drafting choices, and confidentiality considerations before using the result.

CoCounsel also supports an MCP integration with Claude, allowing certain connected legal workflows to be used through that environment. This is an integration option rather than evidence that CoCounsel is a general-purpose coding, creative, or consumer assistant.

Pricing and availability

Public product materials do not provide one standard self-serve price. Thomson Reuters presents CoCounsel through sales-assisted plans whose cost can vary according to the selected product, organization, and related Thomson Reuters content subscriptions.

The current product family includes CoCounsel Legal, CoCounsel Essentials, and Practical Law Dynamic Tool Set with CoCounsel Essentials. CoCounsel Essentials advertises a requestable free trial, but a public trial duration was not verified. There is no verified continuing free plan for the full product, and enterprise access is generally arranged commercially.

Organizations should therefore evaluate not only the assistant itself but also the cost and availability of Westlaw, Practical Law, repository connections, user permissions, and any required implementation work.

Privacy, security, and data handling

Thomson Reuters describes CoCounsel as operating in a controlled professional environment with encryption, enterprise security controls, and protections for confidential legal data. Its materials state that customer data is not used to train the underlying AI models. Thomson Reuters also states that requests originating from the company are processed under Thomson Reuters' identity rather than identifying the customer to the model provider.

Those statements do not eliminate the need for a firm's own review. A current product-specific retention period was not publicly verified, and different underlying model interactions, product terms, and document-management connections may have different storage and retention rules. Security coverage can also vary by product, region, contract, and integration. Legal teams should confirm the applicable terms before sending privileged, confidential, regulated, or especially sensitive material.

Strengths and limitations

Where CoCounsel is a strong fit

• Legal research that benefits from Westlaw or Practical Law grounding and traceable citations.
• Large-scale document review, extraction, comparison, and summarization.
• Repeatable litigation, contract, compliance, and advisory workflows.
• Organizations already using Thomson Reuters content or supported document-management systems.
• Legal teams that need enterprise administration, permissions, integrations, and controlled handling of confidential work.

Important limitations

• Pricing is not transparent and access generally involves a commercial Thomson Reuters relationship.
• Features and legal sources depend on the plan, subscriptions, integrations, and organizational configuration.
• Outputs still require professional review. Citations, extracted facts, legal reasoning, and generated language should not be accepted without checking.
• Current underlying model details are not fully disclosed on the current product pages.
• A precise, universal retention period was not publicly verified.
• The product is specialized for legal work and is not intended as a low-cost consumer chatbot, image tool, audio tool, video tool, or public self-serve API.

Who should consider CoCounsel Legal?

CoCounsel Legal is most suitable for law firms, corporate legal departments, government legal teams, and legal operations groups handling substantial volumes of research, contracts, litigation documents, compliance material, or recurring advisory work. It is particularly relevant when an organization already relies on Thomson Reuters legal content and wants AI assistance inside established Microsoft 365 or document-management workflows.

It may be less suitable for an individual looking for an inexpensive general chatbot, a small team without a need for legal databases or enterprise controls, or an organization seeking a public API that it can freely embed in its own software. It is also not a substitute for attorney supervision, legal research judgment, or a firm's information-governance process.

Bottom line

CoCounsel Legal is best understood as a legal-work platform rather than a generic chat interface. Its distinguishing features are its connection to Westlaw and Practical Law, legal document analysis, cited research, matter-oriented workflows, and integrations with professional systems. The trade-off is a sales-assisted enterprise model, configuration requirements, incomplete public pricing and model details, and the continuing need for careful human review.