How CMS Uses Harvey to Scale AI to 7,200 Lawyers Globally
CMS Law deployed Harvey across 7,200 lawyers in 50+ countries — one of the largest GenAI rollouts in the legal sector — achieving 95% adoption in the initial phase through Harvey's Assistant, Vault, Knowledge, and Workflow Agents.
Impact
95%
lawyer adoption rate in initial rollout
7,200
lawyers scaled firmwide
Challenge
CMS needed to deploy AI at global scale across 50+ countries while maintaining the highest standards of data security and client confidentiality.
Solution
Harvey was deployed through a 12-month pilot of 300 lawyers before scaling to 7,200 firmwide, using Assistant, Vault, Knowledge, and Workflow Agents capabilities.
Tools & Technologies
What Leaders Say
“AI is table stakes. If you do not have access to the tools to use AI, you are not even in the race.”
“We see happier lawyers. Because we are saving time, we can spend more time on value-added activities.”
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Full Story
CMS is one of the world's largest international law firms, with 7,200 lawyers and 10,000+ professionals across more than 50 countries. As generative AI matured, CMS prioritized finding an enterprise-grade partner that could operate at global scale while meeting its strict data governance and client confidentiality requirements.
The challenge was significant: deploying AI across a highly distributed global workforce spanning dozens of jurisdictions and practice groups, where any misstep could carry reputational and legal risk. The firm needed a solution that was not only capable but secure and governable from day one.
CMS selected Harvey and began with a structured 12-month pilot of 300 lawyers, using Harvey's core capabilities — Assistant for document analysis, drafting, and Q&A; Vault for secure bulk document analysis; Knowledge for legal and regulatory research; and Workflow Agents for automating repeatable legal tasks. Strong results from the pilot validated the approach.
By summer 2025, 3,000+ lawyers were actively using Harvey daily, and the firm committed to a full firmwide rollout reaching all 7,200 lawyers — described as one of the world's largest GenAI deployments in the legal sector. Adoption in the initial phase hit 95%. Lawyers are now reviewing larger document sets faster and taking on types of work that were previously impractical. The firm's leadership views AI as table stakes for remaining competitive in global legal services.