MSP and MSSP are acronyms that look nearly identical, describe adjacent services, and are frequently confused — sometimes deliberately, by vendors trying to upsell. The practical difference matters because the services are priced differently, staffed differently, and serve different risk profiles. This guide explains what each model actually delivers, how to assess which your organization needs, and what the cost difference looks like.
What an MSP Does
A managed service provider (MSP) manages the operational health of your IT environment. The core deliverables are monitoring, patch management, help-desk support, backup, and vendor relationship management. An MSP keeps systems running. Its security capabilities are typically limited to baseline hygiene: deploying antivirus or a basic endpoint protection platform, enforcing multi-factor authentication, patching known vulnerabilities, and providing security awareness training.
An MSP is not typically staffed or tooled to detect sophisticated threats, respond to active incidents, or conduct threat intelligence. When an MSP's monitoring catches a ransomware infection in progress, it will usually alert you and recommend calling an incident response firm. It is not in the incident-response business itself.
What an MSSP Does
A managed security service provider (MSSP) focuses specifically on threat detection and response. The defining capability is the Security Operations Center (SOC) — a 24/7 team of security analysts monitoring your environment for indicators of compromise, triaging alerts, and responding to active threats. The tooling typically includes a SIEM (Security Information and Event Management) platform that aggregates logs from across your environment, an EDR (Endpoint Detection and Response) agent on every endpoint, and often network-level detection.
A full-service MSSP offers MDR (Managed Detection and Response) — not just alerting you when they find something, but actively containing the threat, preserving evidence, and helping you recover. This is a materially different service from monitoring. An MDR provider has playbooks for common threat scenarios and the authority (granted by you) to take containment actions like isolating an endpoint without waiting for your approval.
The key differences: an MSSP has security-dedicated staff (SOC analysts, incident responders, threat hunters), security-specific tooling (SIEM, SOAR, threat intelligence feeds), and a service model built around threat response, not operational uptime.
The Pricing Reality
Pricing for MSSP services is typically higher than MSP pricing and structured differently. Where MSPs usually price per-user or per-endpoint per month, MSSPs often price on a combination of endpoint count, data volume (log ingestion to the SIEM), and service tier.
SMB-focused MSSP pricing based on available market data for 2024:
MDR/SOC monitoring only (alert + escalation, no containment): $15–$40 per endpoint per month. You're paying for 24/7 eyes on your endpoints; response is your responsibility.
MDR with active containment: $30–$75 per endpoint per month. The MSSP can isolate a compromised machine, kill a malicious process, or block a network connection without waiting for your authorization call.
Full SIEM + MDR + incident response retainer: $75–$150+ per endpoint per month for SMB environments (50–500 endpoints). At this tier you're getting log aggregation, alert correlation, active threat hunting, and a contractual incident response SLA.
Many companies stack an MSP for operational IT and a separate MSSP for security, paying both. This is common and often the right answer — but the combined cost needs to be budgeted accurately before committing to either relationship.
Who Should Get an MSSP (Not Just an MSP)
The case for MSSP services gets significantly stronger if any of the following apply to your organization:
You handle sensitive personal or financial data. Healthcare organizations covered by HIPAA, companies that process payment card data under PCI-DSS, and professional services firms holding confidential client information all face regulatory and civil liability that makes a breach unusually expensive. The cost-benefit of MSSP monitoring shifts materially when a breach carries seven-figure consequences.
You've had a breach or near-miss. Organizations that have experienced a ransomware incident, a business email compromise, or a confirmed intrusion have verified that the threat model is real for their specific environment. The cost calculation changes when you have historical loss data.
You're subject to a compliance framework that requires 24/7 monitoring. CMMC Level 2 and 3, certain state cybersecurity regulations (NY DFS, for instance), and cyber insurance policy requirements increasingly specify 24/7 monitoring capabilities. An MSP's business-hours security monitoring may not satisfy the letter of the requirement.
Your cyber insurance premium is unsustainable. Carriers have been sharply underwriting risk since the 2021–2022 ransomware wave. Demonstrating MDR coverage and active threat response capability can reduce premiums meaningfully — sometimes enough to offset the cost of the MSSP engagement.
When an MSP's Security Tier Is Enough
Not every SMB needs a full MSSP. The case for staying with MSP-level security:
If your company doesn't handle sensitive regulated data, has a limited attack surface (few externally accessible services, well-segmented network, Microsoft 365 managed by your MSP), and operates in a low-risk industry, the MSP's baseline security stack — EDR, MFA, patching, backup — may adequately control the risk at a fraction of the MSSP cost.
The honest answer for many companies under 50 employees is that better fundamentals from a competent MSP will eliminate more risk than expensive MDR bolted onto a poorly-configured environment. Before adding MSSP spend, confirm that your MSP has actually implemented the basics: MFA enforced across all accounts, EDR deployed on every endpoint, backup tested monthly, no exposed RDP.
The Hybrid Model: MSP + Bolt-On MDR
Several vendors sell standalone MDR products designed to layer on top of an existing MSP relationship, without requiring a full MSSP engagement. Microsoft's Defender for Business, CrowdStrike Falcon Go, and similar products can be procured and deployed with or without an MSP intermediary, and provide EDR with some 24/7 SOC monitoring as an add-on service.
This hybrid model makes sense for companies that have a functioning MSP relationship they don't want to disrupt, need better endpoint detection than their MSP provides, but can't justify a full MSSP engagement at full MSSP pricing. The limitation is that bolt-on MDR products typically don't include SIEM log aggregation, which means correlated threat detection across your full environment (not just endpoints) remains a gap.
Frequently Asked Questions
Can an MSP also be an MSSP?
Some providers market themselves as both. The question to ask is whether their SOC is a real 24/7 staffed operation or a tool that generates alerts which go to daytime-only staff. Many MSPs have added "security" to their name or pitch without building actual MDR capability. Verify by asking for the SOC's staffing model, the SIEM platform in use, and case studies of active threat containment.
What is MDR, and is it the same as an MSSP?
MDR (Managed Detection and Response) is a category of MSSP service that specifically includes active threat containment, not just monitoring and alerting. A pure monitoring MSSP detects and escalates; an MDR provider detects, contains, and helps remediate. Not all MSSPs offer MDR — some are alert-only. When evaluating, ask specifically whether containment actions (isolating an endpoint, blocking a network connection) are included.
What is the difference between EDR and a traditional antivirus?
Traditional antivirus detects known malware signatures. EDR (Endpoint Detection and Response) monitors endpoint behavior continuously, looking for suspicious patterns rather than known signatures — which means it can detect novel or fileless attacks that signature-based tools miss. EDR also generates a detailed forensic record that incident responders can use after a breach. Most competent MSPs deploy EDR rather than legacy antivirus; if yours is still deploying traditional AV, that's a gap.
What should you look for in an MSSP's SOC?
Ask: Is the SOC staffed 24/7 by the MSSP's own employees, or is it outsourced to a third-party SOC provider? What is the mean time to detect (MTTD) and mean time to contain (MTTC) in their most recent reporting period? What SIEM platform do they run? What certifications do their analysts hold? (CISSP, SANS GIAC, CompTIA Security+ at minimum for frontline analysts.) Can they provide a sample incident report from a sanitized engagement?