Thomson Reuters CoCounsel Reaches 1 Million Users as Professionals Embrace Agentic AI

Thomson Reuters’ professional-grade artificial intelligence technology CoCounsel has been adopted by 1 million professionals across 107 countries, the company said in a Tuesday (Feb. 24) press release emailed to PYMNTS.

CoCounsel is Thomson Reuters’ AI technology that powers generative and agentic capabilities across the company’s legal, tax, accounting, audit, risk, compliance and corporate solutions, including CoCounsel Legal, CoCounsel Tax and Audit and ONESOURCE+, according to the release.

Thomson Reuters launched CoCounsel in June, saying the AI platform is designed to help professionals automate complex workflows. It integrates with professional applications to plan, reason and act across tasks while maintaining audit trails and data controls.

Designed for professional environments, CoCounsel analyzes licensed content refined over 175 years, incorporates expert-developed validation logic, delivers citation-backed outputs, and protects customer data, the Tuesday press release said.

The technology delivers outputs that are grounded in editorially enhanced legal and tax sources, not scraped public data; features workflow logic and quality standards that are shaped by domain experts; and integrates with established professional systems. It also incorporates data boundaries, as Thomson Reuters does not repurpose customer inputs to train third-party models or generate outputs for other users, per the release.

CoCounsel’s achievement of the 1 million-user milestone reflects professionals’ shift from deciding whether to use AI to deciding which AI to use, Thomson Reuters President and CEO Steve Hasker said in the release.

“CoCounsel is built for moments when being almost right is not good enough,” Hasker said in the release. “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 1 million professionals rely on CoCounsel.”

The PYMNTS Intelligence report “Agentic AI Breaks Out of the Sandbox” found that among businesses in the United States bringing in at least $1 billion a year, the share of companies that said they were just considering agentic AI plunged from 52% in August to 30% in November.

“Skepticism has faded nearly completely, signaling that the debate over whether enterprises should use agents is over,” the report said. “The question now centers on the functions and tasks for which companies will use them.”

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