The Legal AI Index
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US firm

White & Case

Build and buy. Atlas (proprietary, with Deloitte) plus Legora globally across 43 offices in 29 countries.

Platforms in use
Legora
Proprietary tools and programmes
  • Atlas

    Proprietary AI assistant built with Deloitte (launched Oct/Nov 2025). Multi-model, supports web search, chat history, prompt library, document upload. Lawyers can create and share custom prompts globally.

What is happening
  • ·Legora strategic partnership (Dec 2025) as primary legal AI platform across 43 offices in 29 countries. Largest Legora deployment globally.
  • ·Co-developing Legora Portal for law firm / in-house collaboration.
  • ·Continues to build Atlas in parallel - public 'build and buy' rationale: Atlas for tailored firm and client workflows, Legora for the broader legal AI workload.
  • ·Strong investment in change management capability around the rollout.
Verdict

Notable for doing both build and buy at scale. The Legora deal is the largest single Legora deployment globally, while Atlas signals the firm has no intention of giving up proprietary capability.

Sources