Perimeter MSSP (Managed Vendor Risk Services) is a managed security service that combines Perimeter's vendor risk management (VRM) platform with a team of dedicated security analysts who handle day-to-day vendor assessment operations on behalf of the customer. The service is designed for security teams with limited headcount that are responsible for managing large vendor portfolios. Rather than just providing software, Perimeter assigns dedicated VRM analysts to manage the full assessment lifecycle, including all vendor communications such as initial outreach, follow-ups, and documentation requests. The service includes access to all six modules of the Perimeter VRM platform: - Monitor: Continuous monitoring and alerts - Assess: Automated risk assessments - Extract: AI-powered document intelligence - Verify: Attack surface validation - Share: Document management hub - Respond: RFP and assessment response management Onboarding is included in the service fee, covering data migration, workflow configuration, and operational setup within approximately five days. The service also includes ongoing program management with regular reporting, process optimization, and proactive recommendations. Key outcomes cited by the vendor include an 80% reduction in vendor response time and consistent program quality regardless of internal staff changes. The service is positioned as an alternative to traditional VRM software for organizations that lack the internal resources to operate a VRM program independently.