Deloitte Once Again Achieves Top Spot in Security Services Market According to Gartner Report
In the realm of security services, Deloitte has made headlines once again by being ranked as the number one provider by revenue in the 2026 Gartner® Market Share: Security Services, Worldwide, 2025 report. This marks the third successive year that Deloitte has claimed this prestigious position, underscoring its unyielding dominance in the security consulting landscape, which encompasses Security Consulting Services (SCS), Security Professional Services (SPS), and Managed Security Services (MSS).
Deloitte experienced a notable revenue growth of 19.1% in its Security Services sector in 2025, an increase from 17% in the previous year. Ayan Chatterjee, Deloitte's Global Cyber leader, attributes this growth to the firm's strategic momentum in enhancing its AI-capabilities and establishing deep alliances within the tech ecosystem. Chatterjee remarks, "Deloitte's leadership in the security services market reflects our momentum in scaling AI-enabled cyber capabilities and deep alliance ecosystems."
Notably, Deloitte has maintained its impressive track record, having held the No. 1 position in revenue in Gartner’s previous rankings over a period of 12 years, specifically from 2011 to 2022, prior to the discontinuation of the Security Consulting Services reports.
In the recently published report, Gartner highlights that the overall global revenue from security services has surged by 11.5%, reaching an impressive $84.4 billion in 2025, marking a significant increase from $75.8 billion in 2024. Within this space, Deloitte has captured the largest market share, with a commanding 18.1% of the global Security Services market.
In the sub-segment of Security Consulting, Deloitte once again retained its position as the top-ranked provider, achieving a 32% market share globally in 2025, up from 30.7% in the previous year. Kwasi Mitchell, Deloitte's Global Consulting Services Technology Transformation leader, underlines the importance of security in today's rapidly evolving technological landscape, saying, "Security is foundational to every transformation agenda. As organizations modernize their technology environments and accelerate adoption of AI, they need to build trust and resilience into the way change happens."
Deloitte's commitment to advancing cyber capabilities is evident through their recent investments, which include:
1. Global Future of Cyber Survey: The publication of the 5th edition of this comprehensive survey, which incorporated insights from 1,058 business and technology leaders across 43 countries and five distinct industries.
2. Deloitte Cyber AI Blueprints: These frameworks are designed to guide organizations in their AI adoption journeys across various cyber domains, including threat detection and response, data privacy, and infrastructure security.
3. Operational Technology Cybersecurity Services: Understanding the increasing risks posed by the merging of physical and digital environments, Deloitte is continuously enhancing its security operations to improve cyber resilience and foster trust in operational technology environments.
This recognition in the Gartner report solidifies Deloitte's position as the preeminent leader in security services, showcasing its ability to effectively combine cyber, technology, risk, and transformation capabilities to empower clients navigating a complex digital world.
To learn more about Deloitte’s achievements and offerings, visit their Analyst Relations page for comprehensive insights into their service capabilities and ongoing innovations.
Deloitte experienced a notable revenue growth of 19.1% in its Security Services sector in 2025, an increase from 17% in the previous year. Ayan Chatterjee, Deloitte's Global Cyber leader, attributes this growth to the firm's strategic momentum in enhancing its AI-capabilities and establishing deep alliances within the tech ecosystem. Chatterjee remarks, "Deloitte's leadership in the security services market reflects our momentum in scaling AI-enabled cyber capabilities and deep alliance ecosystems."
Notably, Deloitte has maintained its impressive track record, having held the No. 1 position in revenue in Gartner’s previous rankings over a period of 12 years, specifically from 2011 to 2022, prior to the discontinuation of the Security Consulting Services reports.
In the recently published report, Gartner highlights that the overall global revenue from security services has surged by 11.5%, reaching an impressive $84.4 billion in 2025, marking a significant increase from $75.8 billion in 2024. Within this space, Deloitte has captured the largest market share, with a commanding 18.1% of the global Security Services market.
In the sub-segment of Security Consulting, Deloitte once again retained its position as the top-ranked provider, achieving a 32% market share globally in 2025, up from 30.7% in the previous year. Kwasi Mitchell, Deloitte's Global Consulting Services Technology Transformation leader, underlines the importance of security in today's rapidly evolving technological landscape, saying, "Security is foundational to every transformation agenda. As organizations modernize their technology environments and accelerate adoption of AI, they need to build trust and resilience into the way change happens."
Deloitte's commitment to advancing cyber capabilities is evident through their recent investments, which include:
1. Global Future of Cyber Survey: The publication of the 5th edition of this comprehensive survey, which incorporated insights from 1,058 business and technology leaders across 43 countries and five distinct industries.
2. Deloitte Cyber AI Blueprints: These frameworks are designed to guide organizations in their AI adoption journeys across various cyber domains, including threat detection and response, data privacy, and infrastructure security.
3. Operational Technology Cybersecurity Services: Understanding the increasing risks posed by the merging of physical and digital environments, Deloitte is continuously enhancing its security operations to improve cyber resilience and foster trust in operational technology environments.
This recognition in the Gartner report solidifies Deloitte's position as the preeminent leader in security services, showcasing its ability to effectively combine cyber, technology, risk, and transformation capabilities to empower clients navigating a complex digital world.
To learn more about Deloitte’s achievements and offerings, visit their Analyst Relations page for comprehensive insights into their service capabilities and ongoing innovations.
Topics General Business）
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