Browse MSSP Providers
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 top MSSPs in 2026.
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...
RCZ Solucoes em Seguranca
Best for: Mid-Market to Enterprise orgs, Retail & E-Commerce
RCZ provides cybersecurity solutions and managed security services to organizations in Brazil and Latin America, specializing in threat detection and compliance...
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...
RNS Technology Services
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Energy & Utilities
RNS Technology Services is a Dubai-based MSSP providing managed security operations, cloud security, and cybersecurity consulting services across the Middle Eas...
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...
Safetech Innovations
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Energy & Utilities
Safetech Innovations is a Romanian cybersecurity company providing managed SOC services, threat intelligence, and compliance consulting across Eastern Europe.
SAIC Cybersecurity
Best for: Enterprise orgs, Government & Public Sector, Defense & Aerospace
SAIC (Science Applications International Corporation) is a Reston, VA-based defense technology company delivering managed cyber defense, zero trust, and securit...
Sapphire
Best for: Mid-Market to Enterprise orgs, Government & Public Sector, Manufacturing
Sapphire is a UK-based managed cybersecurity services provider delivering 24/7 SOC operations, MDR, and security consulting for mid-market and enterprise organi...
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...