Top 10: Managed Security Service Providers

The rapid evolution of the digital landscape means organisations face unprecedented cyber threats driven by agentic AI and geopolitical instability.

Managed security service providers ease the lives of enterprises by taking on the massive weight of defending their digital infrastructure from these advanced, growing threats. 

Cybersecurity has shifted from a technical necessity to a board level imperative as businesses navigate complex hybrid cloud environments and stringent data sovereignty regulations.

Managed Security Service Providers (MSSPs) provide the essential shield against these risks by delivering round the clock monitoring threat detection and autonomous response capabilities that internal teams often cannot match.

By partnering with these specialised providers companies can bridge the widening skills gap and ensure operational resilience against sophisticated adversaries. 

Cyber Magazine ranks the top 10 global managed security service providers based on revenue, operational scale and analyst consensus to shine the spotlight on industry titans that have successfully transitioned from basic monitoring to full-spectrum cyber risk management.

These leaders combine massive operational scale with advanced technological innovation to secure the digital economy.

10. Eviden (Atos)

Headquarters: Bezons, France
CEO: Pierre-Yves Jolivet

Eviden is the digital, cloud, big data and security business line of the Atos Group, standing as a European leader in managed security services.

The company combines high-performance computing power with advanced cybersecurity capabilities to protect the world's most critical digital environments.

Eviden manages a global network of security operations centres that leverage AI and big data analytics to detect threats at machine speed.

It is renowned for its sovereign cybersecurity offerings, making it a preferred partner for national governments, defence agencies and regulated industries across Europe.

Eviden's holistic portfolio covers digital identity, encryption and managed detection and response, ensuring end-to-end resilience for digital business.

9. Capgemini

Headquarters: Paris, France
CEO: Aiman Ezzat

Capgemini is a global leader in partnering with companies to transform and manage their business through the power of technology.

Its cybersecurity practice delivers end-to-end managed services that focus on digital sovereignty and the protection of critical assets.

Capgemini operates a global network of Cyber Defense Centers (CDCs) that provide 360-degree visibility and rapid response to advanced threats.

It is particularly strong in manufacturing and energy sectors, offering specialised security for operational technology (OT) and IoT environments.

Capgemini's sovereign-ready cloud solutions make it a partner of choice for European organisations requiring strict data residency and compliance with regulations like NIS2.

8. Verizon

Headquarters: New York, USA
CEO (Verizon Business): Kyle Malady

Verizon is a global technology and communications leader that leverages its massive network infrastructure to deliver robust managed security services.

As the publisher of the definitive Data Breach Investigations Report (DBIR), Verizon possesses unique, data-driven insights into the global threat landscape.

Its managed security offerings are built into the backbone of the internet, allowing it to detect and mitigate threats like DDoS attacks before they reach the customer network.

Verizon specialises in managed network security, SASE and incident response, serving large multinational corporations and government agencies.

Its ability to combine secure connectivity with advanced threat protection makes it an essential partner for protecting critical digital infrastructure.

7. LevelBlue

Headquarters: Texas, USA
​​​​​​​Chairman & CEO: Robert McCullen

LevelBlue is the world's largest pure-play managed security service provider, formed through the strategic combination of AT&T Cybersecurity and Trustwave.

This powerful union brings together carrier-grade network visibility with elite forensic expertise and threat hunting capabilities.

LevelBlue operates a global network of security operations centres and leverages the renowned SpiderLabs team to deliver industry-leading threat intelligence.

Its unified platform integrates managed detection and response, consulting and security engineering to simplify cyber defence for complex enterprises.

Holding critical government certifications like FedRAMP, LevelBlue is a trusted guardian for public sector agencies and global businesses seeking to reduce risk and close the security skills gap.

6. NTT DATA

Headquarters: Tokyo, Japan
President & CEO: Yutaka Sasaki

NTT DATA is a top-tier global innovator in IT and business services, possessing one of the world's largest cybersecurity operating platforms.

Leveraging the immense network visibility of the NTT Group, it processes approximately 40% of the world's internet traffic, providing unparalleled predictive threat intelligence.

NTT DATA operates a global ring of next-generation Cyber Defense Centres that utilise AI and automation to deliver autonomous security outcomes.

Its portfolio covers the entire security lifecycle, from strategic consulting to 24/7 managed detection and response.

A dominant force in Asia-Pacific and a major player globally, NTT DATA helps clients navigate the complexities of the digital economy with 'security as code' and robust data resilience solutions.

5. Tata Consultancy Services (TCS)

Headquarters: Mumbai, India
CEO & Managing Director: K Krithivasan

TCS is a global leader in IT services, consulting and business solutions, delivering comprehensive cybersecurity services to the world's largest corporations.

Its Cyber Defense Suite provides 360-degree visibility and unified threat management across extended enterprise ecosystems.

TCS integrates security directly into its cognitive business operations model, ensuring that cyber resilience is embedded in every layer of the digital enterprise.

With a vast global workforce and innovation hubs worldwide, TCS offers unmatched scale and cost-efficiency in managed detection and response (MDR), identity management and cloud security.

It is a trusted partner for driving secure digital transformation, leveraging deep contextual knowledge to mitigate risks and ensure business continuity.

4. IBM Security

Headquarters: New York, USA
Chairman & CEO: Arvind Krishna

IBM Security is a premier global provider of integrated security products and services, protecting thousands of organisations with one of the world's most advanced threat intelligence networks.

Backed by the legendary X-Force research team, IBM monitors billions of security events daily to provide pre-emptive protection against sophisticated attacks.

Its managed services portfolio is built on the QRadar suite and WatsonX AI, delivering cognitive threat detection and automated response capabilities.

IBM protects the world's most critical infrastructure, including financial systems and government networks, with a focus on hybrid cloud security and open standards.

Its enduring legacy of trust and innovation makes it a cornerstone of the global cybersecurity landscape.

3. EY

Headquarters: London, UK
Global Chair & CEO: Janet Truncale

EY is a global leader in assurance, tax and consulting services that has rapidly ascended to the top tier of the managed security market.

Through its NextWave strategy, EY delivers intelligence-led cybersecurity managed services that help clients bridge the gap between technical risk and business strategy.

It operates a global network of security operations centres (SOCs) that utilise next-generation automation to detect and neutralise threats at speed.

EY is particularly dominant in high-stakes sectors like banking and energy, providing specialised capabilities in cyber analytics, digital identity and crisis management.

its focus on building digital trust allows clients to adopt emerging technologies like AI and cloud computing with confidence.

2. Accenture

Headquarters: Dublin, Ireland
Chair & CEO: Julie Sweet

Accenture Security is a global powerhouse delivering end-to-end cybersecurity transformation for the world's largest enterprises.

Renowned for its ability to operate at massive scale, Accenture combines deep industry knowledge with advanced technology to build cyber resilience into the digital core of business.

Its Cyber Fusion centres provide round-the-clock threat monitoring, powered by proprietary AI automation and an ecosystem of best-of-breed technology partnerships.

Accenture excels in securing complex digital transformations, offering specialised services in digital identity, application security and operational technology (OT) protection.

As a consistent leader in analyst reports from IDC and Forrester, Accenture empowers organisations to innovate confidently by managing security risks as a critical business function.

1. Deloitte

Headquarters: London, UK
Global CEO: Joe Ucuzoglu

Deloitte is the world's leading professional services network and the undisputed revenue leader in managed security services.

Ranked number one globally by Gartner many years in a row, Deloitte transforms cybersecurity from a technical necessity into a strategic business enabler.

Its Cyber Risk portfolio integrates deep regulatory expertise with 24/7 managed threat detection delivered through a global network of Cyber Intelligence Centres (CICs).

Deloitte leverages its massive scale to offer end-to-end solutions including digital identity, incident response and cloud security governance.

It is the preferred partner for Global 2000 organisations navigating complex geopolitical risks and compliance mandates like NIS2 and DORA.

By combining high-touch consulting with automated defence platforms like MXDR, Deloitte delivers unmatched visibility and resilience for the C-suite.