CoCounsel: Fiduciary-Grade AI™ built for high-stakes professional work
Most AI makes you faster; CoCounsel makes you better — delivering answers you can defend, outcomes that add real value, and integration that works without friction
AI for professionals who can't afford to be wrong
Accelerate legal, tax, audit, compliance, and drafting work with purpose-built AI grounded in authority, transparency, and trust
Work smarter with CoCounsel, already trusted by 1M users
Every experience is designed to help professionals produce work that can be examined, explained, and defended. Deliver work that will stand up to scrutiny, knowing CoCounsel is:
- Grounded in authoritative content and expert-validated sources
- Connected to the tools you already use, including Westlaw, Practical Law, Checkpoint, Microsoft 365, and document management system partners
- Protected by enterprise-grade privacy and security safeguards, so sensitive work stays protected
Trusted authority
Generic AI tools create risk faster than value. CoCounsel helps you work confidently by providing answers grounded in our authoritative, proprietary content.
Enterprise-grade protection
Sensitive work requires structural safeguards. CoCounsel is designed to protect customer data with rigorous privacy and security controls.
Domain expertise
Professional workflows require accuracy, nuance, and judgment. CoCounsel is designed, tested, and refined with subject-matter experts validating AI in real time.
Transparent and verifiable
When almost right isn’t good enough, every output must hold up to scrutiny. CoCounsel surfaces sources and reasoning so you can confidently verify and defend your work.
The future of Fiduciary-Grade AI is here.
See how Thomson Reuters is leading the way.
Trusted by industry leaders
Cole, Scott & Kissane drives efficiency and elevates client services with CoCounsel
Something that might have taken eight or nine hours might now take one-and-a-half to two hours. CoCounsel helps us be more efficient while maintaining top‑quality work.
Steven Hicks-Safra, General Counsel
Cole, Scott & Kissane
On any given day, I feel like I save 6 to 8 hours of attorney time.
Daniel Olson
Shareholder, Bassford Remele
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What CoCounsel has allowed us to do is efficiently manage massive amounts of data and become more responsive to our clients’ needs, in a timelier fashion.
Ted Schaer
Chairman of Litigation, Zarwin Baum
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CoCounsel is not a replacement for outside counsel when the stakes are high, but for 90% of what I do day-to-day, it’s the perfect solution.
Gregory Kantor
CFO, OMNIUX
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Frequently asked questions
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.
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.
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.
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.
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.
Fiduciary‑Grade AI is the Thomson Reuters standard for how AI should work in high-stakes professions. It is AI designed for professionals with duties of care and regulatory oversight — drawing on authoritative, domain-specific content; protected by rigorous privacy and security safeguards; shaped by subject-matter experts; and designed to produce transparent outputs that can be verified.
General-purpose AI is useful for broad productivity tasks. Fiduciary‑Grade AI is designed for professional work where outputs may influence legal judgments, financial disclosures, regulatory filings, compliance decisions, or client advice. It emphasizes authoritative sources, privacy, expert involvement, and verifiable outputs.
No. Fiduciary‑Grade AI is designed to support human judgment, not replace it. Professionals remain responsible for the advice they give, the decisions they make, and the work they sign off on.