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.
Provintell Technologies
Best for: SMB to Mid-Market orgs, Government & Public Sector, Technology
Provintell Technologies is a Malaysian cybersecurity firm providing managed security services across Southeast Asia.
PwC Cybersecurity
Best for: Enterprise orgs, Energy & Utilities, Government & Public Sector
PwC delivers managed cyber defense, threat intelligence, and security operations as one of the Big Four professional services firms, serving global enterprise a...
PwC UK - Managed Cyber Services
Best for: Enterprise orgs, Energy & Utilities, Telecommunications
PwC UK's Managed Cyber Services delivers enterprise-grade security operations, threat intelligence, and cyber defense services backed by one of the world's larg...
Quorum Cyber
Best for: SMB to Enterprise orgs, Government & Public Sector, Manufacturing
Quorum Cyber is a UK-based MSSP founded in 2016 in Edinburgh, offering Microsoft-native managed detection and response to 350+ global clients and ranked #50 on...
Rackspace Cybersecurity
Best for: Mid-Market to Enterprise orgs, Technology, Retail & E-Commerce
Rackspace Technology is a global cloud and managed services provider founded in 1998 in San Antonio, TX, delivering Fanatical Security managed services with 24/...
Rapid7
Best for: SMB to Enterprise orgs, Technology, Manufacturing
Rapid7 provides managed detection and response powered by the InsightIDR platform, combining their own security technology with SOC expertise for continuous thr...
Red Canary
Best for: SMB to Enterprise orgs, Technology, Manufacturing
Red Canary is a managed detection and response provider that delivers outcome-focused security operations, combining its proprietary detection engine with a ded...
Reliance Cyber
Best for: SMB to Enterprise orgs, Legal, Technology
Reliance Cyber is a UK-based managed cybersecurity provider delivering SOC services, MDR, and security consulting for mid-market and enterprise organizations ac...
ReliaQuest
Best for: Mid-Market to Enterprise orgs, Technology, Retail & E-Commerce
ReliaQuest provides security operations through its GreyMatter platform, offering unified visibility, automated response, and managed detection across hybrid en...
RSM US (RSM Defense)
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Defense & Aerospace
RSM US is the largest US CPA and advisory firm offering a full-scale MSSP practice (RSM Defense) with CMMC Level 2 certification, the largest C3PAO status, and...
Sagacent Technologies
Best for: SMB to Mid-Market orgs, Technology
Sagacent Technologies delivers managed IT and cybersecurity services to businesses in the San Francisco Bay Area and Silicon Valley.
ScienceSoft
Best for: SMB to Enterprise orgs, Retail & E-Commerce, Manufacturing
ScienceSoft provides managed security services as part of its broader IT consulting and software development practice, offering security monitoring, vulnerabili...