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MSSP
A provider that runs security services, such as monitoring or testing, for other businesses.
What it means
An MSSP, or managed security service provider, runs security work on behalf of other businesses. The services vary: round-the-clock monitoring, managing firewalls, handling alerts, vulnerability scanning, penetration testing, and helping with compliance. The client buys an outcome rather than hiring a security team.
It differs from a general IT provider in what it is accountable for. An MSSP is judged on detection, response and evidence. Many serve smaller companies that cannot justify an in-house security team, and some specialise in one area, such as application security testing for software firms.
Why it matters
Smaller businesses face the same threats as large ones with fewer people. An MSSP gives them access to skills and routines they would struggle to hire. For the provider, security services are a way to deepen client relationships and add recurring revenue.
The choice matters because the provider gets access to sensitive systems and findings. A weak MSSP becomes a route in, which makes it a vendor risk to manage like any other. The contract should state what is covered, how fast they respond, and who can see your data.
How it shows up
In practice you meet an MSSP through a service agreement with defined scope, response times, reports and escalation contacts. Alerts flow to their team, they triage, and they pass on what needs your action. For testing, they run penetration tests and hand over findings with fixes.
Common problems: unclear boundaries about who responds at night, reports that list issues without evidence, tools the provider owns that leave when the contract ends, and no routine to recheck fixes. Ask for sample reports, named contacts, data handling terms, and how they prove a fix worked.
Questions people ask
MSSP, answered
What does an MSSP do?
It runs security services for clients, such as monitoring and alert handling, managing security tools, vulnerability scanning and penetration testing, and compliance support. The scope is set in the contract.
Services differ widely between providers.
What is the difference between an MSSP and an MDR provider?
An MSSP offers a broad set of managed services, often tool management and monitoring. An MDR provider focuses on detecting and actively responding to threats. The lines blur, so ask what is actually included.
Read the service description.
Can an MSSP be a security risk?
Yes. Providers hold privileged access and sensitive findings, so a breach at the provider can reach clients. Treat it as a supplier: ask about its own controls, access management and incident process.
Include audit rights in the contract.
When does a business need an MSSP?
When it needs security coverage it cannot staff itself, such as constant monitoring or regular testing, or when customers and auditors expect it. A small team often starts with one service.
Start with the gap that worries you most.
Can an MSSP sell application testing under its own brand?
Yes, many do, using their own staff or partner tools and delivering results under their name. Clients should still see how findings were verified.
The related page on white-label pentesting covers how that works.
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Terms that sit next to this one
White-label pentesting
Security testing delivered to your clients under your own brand.
MDR
An outside service that monitors your systems and responds to threats for you.
Security operations centre
A team and room that watch for and respond to threats around the clock.
Vendor risk management
Judging and monitoring the security of the suppliers your business relies on.
Pentest as a service
Penetration testing bought as an ongoing subscription rather than a one-off project.
Can you offer testing under your brand?
Agencies and MSSPs can run Cyberlop under their own brand, with findings that carry the request, the response and the line of code. It can run on a schedule or in CI/CD. Ask us to run it on one of your applications.
Or start with a $199 pilot on one application: thirty days, success criteria agreed before day one, credited against the annual if you convert.