CoCounsel: The industry-leading AI assistant for professionals

Built by industry experts, backed by authoritative content, and equipped with best-in-class security, CoCounsel frees you to focus on high-value work that better serves your clients and business

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Legal professionals\
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Tax professionals\
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Audit professionals\
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Accounting professionals

CoCounsel is your trusted partner, supporting you every step of the way

Move effortlessly between tasks with an AI assistant powered by agentic and generative AI.

Meet CoCounsel

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Work smarter with advanced AI

Now, professionals can benefit from a single, integrated AI assistant for all their needs. CoCounsel provides:

• A fluid connection to the solutions you work in every day; it understands context and nuance across products and workflows, allowing you to derive more in-depth insights faster than ever.
• Access to the most innovative large-language models (LLMs) backed by the industry's most trusted and reliable content.
• Integration with industry-leading platforms such as Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners.

Expert technology

Deliver results faster than ever before with technology engineered by over 1,000 AI and machine-learning (ML) experts.

Data privacy

Operate confidently knowing your sensitive data is secure, private, and not being used to train artificial intelligence models.

Trustworthy AI

Transform your work with agentic AI and generative AI (GenAI) grounded in trusted content and maintained by experts who focus on limiting inaccuracies and algorithmic bias.

Secure processing

Protect your client’s sensitive data during transit and storage with industry-standard protocols and encryption.

The future of professional-grade AI is here. See how Thomson Reuters is leading the way.

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Professionals are choosing CoCounsel

CoCounsel is truly revolutionary legal tech. Its power to increase our attorneys’ efficiency has already benefited our clients. And we have only scratched the surface of this incredible technology.

John Polson Chairman and Managing Partner at Fisher Phillips, LLP

I used to spend an hour on this tax process, but with CoCounsel doing 80% of the work for me, I'm able to enjoy using judgment and reasoning when finishing the project since the mundane research is done for me.

Tax partner Top U.S. 100 firm

Frequently asked questions

Does Thomson Reuters or its third parties retain user content or prompts to train their GenAI-based products or underlying large-language models (LLM)?

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No. Your user content and prompts are not used to train or improve CoCounsel and associated products or LLMs, used in Thomson Reuters or third-party output, or stored by OpenAI or Google.

Thomson Reuters AI third-party partners, such as OpenAI and Google, are contractually prohibited from using any customer data to train their models. Additionally, where applicable, we have established systemic controls to turn off third parties' abuse-monitoring solutions to ensure there is no human access to Thomson Reuters customers' data or inclusion of that data in third-party models.

How long does Thomson Reuters retain user content and prompts?

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Retention of user content and prompts is customized to fit customer needs and set up at the organization account level with the support of a Thomson Reuters client manager. We then delete user content and prompts in accordance with the customer's retention policy. Users can delete their content and prompts in the product at any time.

How does Thomson Reuters protect user privacy and data?

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All GenAI LLM requests originating from Thomson Reuters are processed under the identity "Thomson Reuters," never identifying the Thomson Reuters customer who made the request. We secure all data in transit via TLS 1.2, and symmetric encryption (AES-256) protects data at rest. All interactions with GenAI LLM providers use zero-retention API calls.

Where are user content and user prompts stored when retained?

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Systematic procedures and hosting are in the U.S. We process all interactions with OpenAI GPT and Google Gemini in the U.S. We host backup data in separate availability time zones in the U.S.*

*Region-based hosting is available in the UK, Australia, and Canada.

What guardrails are in place to prevent bias in Thomson Reuters content?

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We have developed and implemented prompting "guardrails," ensuring our GenAI-based products will only produce responses from content drawn from a clearly defined and limited set of verified information, such as our own content databases. This practice restricts the large language model's ability to produce potentially objectionable content broadly sourced from the internet.

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