Top 250 MSSPs: Managed Security Services Company List and Research for 2021


A few reminders for you:


10. eSentire Inc.
Waterloo, Ontario, Canada
eSentire is recognized industry-wide because we prioritize Response. Through Managed Risk, Managed Detection and Response, and Digital Forensics and Incident Response services, we protect every business with security that scales. eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1000+ organizations in 70+ countries from known and unknown cyber threats. Through improved detection, 24/7 threat hunting, deep investigation, end-to-end coverage and complete incident response lifecycle support, eSentire stops cyber threats before they become business disrupting events.


9. ECS Federal
Fairfax, Virginia, USA
ECS, a segment of ASGN, delivers advanced solutions in cloud, cybersecurity, artificial intelligence (AI), machine learning (ML), application and IT modernization, science, and engineering. The company solves critical, complex challenges for customers in Enterprise, Commercial, Public Sector, Defense, and Intelligence industries. ECS maintains partnerships with leading cloud, cybersecurity, and AI/ML providers and holds specialized certifications in their technologies. Headquartered in Fairfax, Virginia, ECS has more than 3,400 employees throughout the United States.


8. Accenture
Chicago, Illinois, USA
Accenture’s managed security capabilities span managed application security, managed cloud security, managed digital identity, managed security risk, and managed detection and response (MDR) services.


7. Kroll
New York, New York, USA
World-renowned cyber investigators and leading technology fuel Kroll’s managed security services, augmenting security operations centres and incident response capabilities with 24×7 detection, response and actionable threat intelligence. Since the acquisition of Redscan in March 2021, we’ve expanded our managed security services to deliver robust MDR and XDR services as well.


6. Trustwave
Chicago, Illinois, USA
Trustwave is recognized as a global security leader in managed security services (MSS) and managed detection and response (MDR). Trustwave’s mission is to help organizations across the globe detect and respond to threats 24×7 in the hybrid multi-cloud world. Trustwave combines decades of experience integrating and managing clients’ security technologies with the elite Trustwave SpiderLabs team, which provides award-winning threat research and intelligence. Trustwave infuses SpiderLabs threat intelligence into all of its services and products to fortify cyber resilience in the age of advanced threats.


5. Herjavec Group
North York, Ontario, Canada
Herjavec Group’s award-winning Managed Security Services Practice defends global, enterprise-level organizations from increasingly sophisticated, targeted cybercrime threats. We combine the power of technology, AI, and automation with human intelligence to optimize the IT security monitoring, incident detection, and incident response times of enterprises around the world. We leverage a fully remote and geo-redundant SOC Operation, trained analysts, and industry leading expertise in Detection, Analysis, SOAR, Threat Management, and Incident Response. Additionally, our practice is built on a continuous improvement feedback loop, so we support the enhancement of our client’s security program and drive our mutual security objectives every step of the way.


4. Neustar
Reston, Virginia  USA
Neustar is home to some of the nation’s top cybersecurity experts and offers the industry’s most comprehensive security portfolio via a suite of cloud-based solutions and services for application security, DNS, security intelligence and web performance management. In 2020, Neustar’s SOC saw a considerable increase in the number of DDoS attacks it mitigated on behalf of its more than 8,000 global customers in financial services, government, telecommunications and other industries – up 154% vs. 2019. With IT infrastructure demands becoming increasingly complex and cyberattacks more sophisticated, Neustar’s dedicated team helps customers – which include 60 of the Fortune 100 – stay ahead of the curve to stave off the next attack against their network or fleet of IoT devices. Neustar operates complex data registries and uses its expertise in analytics, cybersecurity, and fraud prevention to link critical information and provide data-driven insights that facilitate trusted connections between companies and their customers. Due to its unique position and visibility across the global internet ecosystem, Neustar’s reach and unmatched breadth and depth of data allow the company to better understand the threat landscape – and protect clients from cyberthreats as they evolve.


3. BT Security
Irving, Texas, USA
We have the technology and intelligence to spot and tackle global cybersecurity threats before they become the stuff of headlines.


2. Orange Cyberdefense
Nanterre, Paris, France
We are Europe’s leading security services provider, supporting businesses globally. Our international reach includes the Americas, Africa, Middle East and Asia Pacific. Our mission is to build a safer digital society.


1. AT&T Cybersecurity
Dallas, Texas, USA
AT&T Cybersecurity helps make business networks more resilient to overcome the cybersecurity threats that are now part of modern business. Together, the power of the AT&T network, our managed solutions with advanced security technologies and deep threat intelligence and expertise from AT&T Alien Labs and the Open Threat Exchange, accelerate the response to cybersecurity threats. Our experienced consultants and SOC analysts help manage network transformation to reduce cybersecurity risk and overcome the skills gap. We help to design, deploy, and manage the highly secure network that organizations aspire to by proactively identifying areas of cyber risk and preventive measures to protect digital connections. Our mission is to be a trusted advisor on our customers’ journey to cybersecurity and network resiliency, making it safer to innovate.