Deloitte Maintains Top Global Security Services Market Share

The broader security services sector saw significant expansion in 2025, with global revenue rising 11.5% to reach US$84.4 billion. Deloitte’s performance outpaced this industry growth, particularly within the security consulting sub-segment, where the firm now holds a 32% global market share, up from 30.7% the previous year.

Ayan Chatterjee, Deloitte Global Cyber leader, attributed the sustained dominance to the firm’s focus on scaling AI-enabled cyber capabilities and deep alliance ecosystems. This strategy aligns with the firm’s broader push into operational technology cybersecurity and the launch of new AI-focused security blueprints. Kwasi Mitchell, leader of Deloitte Global Consulting Services, emphasized that as organizations accelerate their AI adoption, security has become a foundational element of every digital transformation agenda.

The firm’s recent investments include the publication of its fifth Global Future of Cyber Survey, which synthesized insights from over 1,000 leaders across 43 countries. By integrating cyber, technology, and risk capabilities, Deloitte aims to address the governance demands posed by increasingly complex digital environments.