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Three Years After Launching As First AI Legal Assistant, CoCounsel Reaches 1 Million Users — and Thomson Reuters Teases What’s Ahead

By Bob Ambrogi on February 24, 2026
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CoCounsel, which launched almost exactly three years ago, on March 1, 2023, as the first AI legal assistant built on GPT-4, today marked a notable milestone, reaching 1 million customers across 107 countries and territories. Developed by legal research startup Casetext, Thomson Reuters acquired CoCounsel (and Casetext) just four months after its release, for a […]

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