MSSP Directory: Compare Managed Security Service Providers
This directory lists managed security service providers (MSSPs), the companies that run security monitoring, threat detection, and incident response for organizations without a full in-house security operations center. Filter the full list by service, industry, company size, and security platform to narrow it into a shortlist you can compare side by side.
Compare managed security service providers. Use filters to narrow your search. The directory covers providers across all major service categories (MDR, SIEM management, vulnerability scanning, incident response, and more) as well as a wide range of industries and security platforms. Use the filter sidebar to narrow results by the criteria that matter most to your organization, and combine multiple filters to zero in on the right shortlist. Each provider profile includes service details, certifications, platform expertise, and key operational facts so you can compare options without leaving the page. New to MSSPs? Read our guide on what managed security service providers do or see the best MSSP providers in 2026. To turn a long list into a focused evaluation set, use our MSSP provider shortlist guide.
NTT Security
Best for: Mid-Market to Enterprise orgs, Retail & E-Commerce, Manufacturing
NTT Security provides managed security services through a global network of SOCs, offering comprehensive threat detection, incident response, and consulting ser...
Nu-Age
Best for: SMB to Mid-Market orgs, Retail & E-Commerce
The Nu-Age Group provides managed IT and cybersecurity services to businesses in Central Florida.
Nucleus Networks
Best for: SMB to Mid-Market orgs, Technology
Nucleus Networks is a SOC 2 Type II certified managed IT and cybersecurity provider serving small and mid-sized businesses across Canada with a dedicated cybers...
NuHarbor Security
Best for: SMB to Mid-Market orgs, Manufacturing, Technology
NuHarbor Security provides managed detection and response, security program advisory, and compliance services for mid-market organizations from its New England...
Nuspire
Best for: Mid-Market to Enterprise orgs, Retail & E-Commerce, Manufacturing
Nuspire is a Commerce Township, MI-based MSSP founded in 1999 with one of the longest track records in managed security, offering 24/7 SOC services, MDR, and ne...
Omega Systems
Best for: SMB to Enterprise orgs, Manufacturing, Government & Public Sector
Omega Systems is a Philadelphia-area MSP/MSSP specializing in regulated industries, delivering managed detection and response, 24/7 SOC operations, endpoint and...
one IT
Best for: SMB to Mid-Market orgs, Manufacturing, Retail & E-Commerce
one IT is a Mexican cybersecurity and IT services company providing managed security operations, cloud services, and compliance support to organizations across...
OneAxiom
Best for: SMB to Mid-Market orgs, Technology, Retail & E-Commerce
OneAxiom delivers managed cybersecurity services including SOC operations, cloud security, and compliance management for organizations across the United States.
ONESECURE Asia
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Technology
ONESECURE Asia provides managed security services across Southeast Asia, offering SOC operations, threat intelligence, and compliance solutions.
Ontinue
Best for: Mid-Market to Enterprise orgs, Technology, Manufacturing
Ontinue is a Microsoft-native MXDR provider founded in 2023, delivering AI-powered nonstop security operations via a unique Microsoft Teams-integrated collabora...
Open Group
Best for: SMB to Mid-Market orgs, Government & Public Sector
Open Group is a Colombian IT and cybersecurity company providing managed security services across Colombia and Latin America.
OpenText
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Defense & Aerospace
OpenText provides managed security services built on its ArcSight and EnCase platforms, serving large enterprises with mature security programs that need operat...