What Is an MSSP and How Is It Different from an MSP?

What is an MSSP and how is it different from an MSP? The acronyms are similar enough that they get used interchangeably, but they describe different services with different scopes. An MSP is a managed service provider focused on IT operations; an MSSP is a managed security services provider focused on security operations. Understanding the difference helps businesses know which type of partnership they actually need.

The Core Distinction

The fundamental difference:

• MSP (Managed Service Provider) — operates IT infrastructure, endpoints, applications, and user support. Their focus is keeping technology working for the business.
• MSSP (Managed Security Service Provider) — operates security monitoring, threat detection, incident response, and security tooling. Their focus is preventing, detecting, and responding to security incidents.

A business may engage both, or one provider that offers both capabilities. The capabilities overlap somewhat but are distinct enough that "MSP that does some security" is different from "MSSP."

What MSSPs Typically Provide

A real MSSP delivers:

• 24/7 SOC monitoring — continuous oversight of security events with analyst review
• Threat detection and hunting — beyond automated detection, proactive search for indicators
• Incident response — when incidents happen, capable response support
• Security tool operation — EDR/MDR, SIEM, email security, identity controls operated by the MSSP
• Threat intelligence — current intelligence on attacker techniques and indicators
• Vulnerability management — discovery, prioritization, and remediation tracking
• Compliance support — evidence collection, attestation support, audit response
• Security advisory — strategic guidance on security investments and posture

What MSPs Typically Provide (and Where Security Overlap Exists)

MSPs typically cover:

• End-user IT support and helpdesk
• Endpoint management and patching
• Server and infrastructure operations
• Network management
• Cloud platform administration
• Backup and disaster recovery
• Project work for IT initiatives

Many MSPs include basic security services as part of their offering — endpoint antivirus, basic email security, patching with security implications. This is "MSP with some security" rather than MSSP-level security operations. The distinction matters because the depth of security monitoring and response is meaningfully different.

How to Tell If a Provider Is Actually an MSSP

Some providers market themselves as MSSPs without delivering MSSP-level capability. Markers of a real MSSP:

• 24/7 SOC with named analysts, not just on-call rotation
• Specific security tooling deployed and operated
• Incident response capability with measurable response times
• Threat intelligence integration into operations
• Security-focused certifications and team expertise
• SOC 2 Type II attestation of their own operations
• Detailed reporting on security activities, not just IT operations
• References from customers about security-specific value, not just IT support

If the answers to these questions are vague, the provider is probably an MSP-with-some-security rather than a real MSSP. For businesses that need MSSP-level capability, the distinction matters.

The Integrated MSP+MSSP Model

For SMB and mid-market businesses, the most common pattern that works is an integrated provider that delivers both MSP and MSSP capabilities. The reasoning: the IT operations and security operations overlap heavily. The same endpoints need patching (IT) and EDR monitoring (security). The same identity platform handles authentication (IT) and conditional access (security). Splitting these between separate providers creates coordination overhead and integration gaps.

The integrated model produces better outcomes when the provider has genuine MSSP capability, not just MSP-with-some-security. The risk is engaging an "integrated" provider whose security capability is shallow; the customer gets MSP service with a security veneer.

When to Choose Each Model

The decision flow:

• Need IT operations support, with security being a minor concern? — MSP
• Need both IT operations and meaningful security operations? — Integrated MSP+MSSP, with verification that the security capability is real
• Have internal IT but need security specifically? — Standalone MSSP layered onto internal IT
• Large enough to have internal IT and internal security? — Specialized MSSP for specific capabilities like 24/7 SOC that don't scale at internal staffing

For most SMBs and mid-market businesses, the integrated model with a provider that has genuine MSSP capability is the right answer. At Leonidas, we operate as an integrated MSP and MSSP rather than as separate practices. If you're scoping the right provider model for your business, a conversation with our team can frame the decision.