Thomson Reuters, a global technology and content company, has just announced one million professionals have chosen CoCounsel, the company's professional-grade AI technology, across 107 countries and territories.
The milestone reflects a broader transition underway across high-stakes industries including legal, risk, compliance, tax, accounting, audit and global trade professionals. AI is moving from experimentation to production. Rather than standalone tools, firms are embedding AI directly into daily workflows where accuracy, sourcing, and data protection are essential.
General-purpose AI can generate plausible answers. Regulated professionals, however, need AI that withstands review in courtrooms, audits, and regulatory proceedings. These systems need to retrieve authoritative sources, verify citations, and apply jurisdiction-specific rules.
CoCounsel fulfills those requirements, powering intelligent capabilities across the company's portfolio—including CoCounsel Legal, CoCounsel Tax and Audit, and ONESOURCE+. It integrates into the tools professionals already use, analyzes licensed content refined over 175 years, incorporates expert-developed validation logic, and delivers structured, citation-backed outputs. Customer data remains protected and is not repurposed to train third-party models. More than 4,500 Thomson Reuters subject matter experts contribute to the validation and continuous refinement of CoCounsel's outputs across legal, tax, and compliance domains.
"Professionals are not deciding whether to use AI anymore. They are deciding which AI they trust when their reputation and their clients' data are on the line," said Steve Hasker, President and Chief Executive Officer, Thomson Reuters. "CoCounsel is built for moments when being almost right is not good enough. It is grounded in decades of authoritative content, validated by domain experts, and backed by a clear commitment that customer data remains theirs. That is why one million professionals rely on CoCounsel."
"When the work matters, the AI must be professional grade. Professionals need systems that can complete sophisticated work within the standards they are accountable to every day. That's the gap between CoCounsel and everything else," added David Wong, Chief Product Officer, Thomson Reuters. "One million CoCounsel users across 100+ countries and territories reflects a shared global consensus."
CoCounsel's adoption reflects design decisions tailored to professional environments:
In legal, tax, audit, and compliance workflows, AI must retrieve relevant authority, analyze structured and unstructured information, apply jurisdictional rules, and generate outputs that stand under review. That requires vertically integrated systems.
CoCounsel functions as an execution layer embedded within professional platforms, combining foundation models, proprietary AI engineering, licensed content, and domain expertise to complete multi-step workflows end to end.
Graphic source: Thomson Reuters media source content.
The next generation of CoCounsel Legal, entering beta soon, is designed around conversational task execution. Soon, legal professionals within law firms and corporations, will be able to describe an objective as they would brief a colleague. CoCounsel will build a plan, retrieve authority from Westlaw and Practical Law, search relevant user documents and precedent, analyze the material, verify that citations remain in good law, and deliver structured work product within a single system. Additional next-generation capabilities within CoCounsel Tax and ONESOURCE+ are planned for later in 2026.
As AI becomes embedded in professional systems, the defining question is not how quickly it can produce text, but whether it can support work that carries legal or financial consequences.
With one million professionals relying on CoCounsel, Thomson Reuters is not participating in the AI race. It is defining how AI operates in the world's highest-stakes work.
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This feature was adapted from Thomson Reuters press announcement and related content furnished in part through Dotted Line Communications. Feature graphic images and captions* were adapted from related Thomson Reuters sources with permission. Source materials were adapted by Insightful Accountant solely for educational purposes. Insightful Accountant is not responsible for any of the original content furnished by Thomson Reuters or published on their website.
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