What Is an MSSP (Managed Security Services Provider)?
An MSSP, or managed security services provider, is a company that monitors, manages and responds to cybersecurity threats for other businesses. Instead of hiring an in-house security team, a business outsources protection such as endpoint detection and response (EDR), email security, firewall management, vulnerability management and incident response to the MSSP.
What does MSSP mean in cybersecurity?
In cybersecurity, an MSSP is your outsourced security operations team. Where a traditional IT provider keeps systems running, an MSSP focuses on keeping attackers out and catching the ones who get in. That means continuous monitoring of endpoints, email, network and cloud accounts, and acting fast when something suspicious appears.
MSP vs MSSP: what's the difference?
| MSP (managed service provider) | MSSP (managed security services provider) | |
|---|---|---|
| Main goal | Keep IT running and productive | Keep the business secure |
| Typical services | Help desk, device and network management, patching, cloud, backups, phones | Threat monitoring, EDR, email security, vulnerability management, incident response, security awareness training |
| Focus | Uptime and user support | Threat detection, response and risk reduction |
| Tools | Remote monitoring and management, ticketing, backup | EDR/MDR, SIEM, email filtering, firewall and log monitoring |
| Measured by | Uptime and ticket resolution | Threats prevented, detected and contained |
| Best for | Day-to-day IT support | Businesses handling sensitive data or facing compliance requirements |
Many small and midsize businesses need both. A combined "cybersecurity MSP" delivers managed IT and managed security under one agreement, so the team fixing your laptop is the same team watching it for threats.
What is EDR, and why does an MSSP use it?
Endpoint detection and response (EDR) is security software on every computer and server that watches for suspicious behavior, not just known viruses. When it spots something like ransomware encrypting files or an attacker using stolen credentials, it can isolate the device and alert the security team. Traditional antivirus blocks known threats. EDR catches the unknown ones and gives the MSSP what it needs to investigate and respond. Learn more about endpoint detection and response →
Do small businesses need an MSSP?
Yes, more and more. Attackers target small businesses because they often lack dedicated security staff. Phishing, business email compromise and ransomware hit companies of every size. An MSSP gives a 10- or 50-person company security monitoring that would otherwise take a full-time team. Why SMBs need an MSSP →
Castle's approach: managed IT and security in one partner
Castle Technology Partners has been a managed IT and cybersecurity provider for businesses in Daphne, Mobile, Baldwin County and Gulf Coast cities in Mississippi and Florida since 2019. We combine everyday IT management with layered security, including endpoint detection and response, email filtering, security awareness training, patching, backups and incident response planning, so security isn't an add-on. We also support CMMC Level 1 compliance for defense contractors. Our security partnership with ArmorPoint (see /castle-technology-partners-announces-strategic-cybersecurity-partnership-with-armorpoint/) extends our monitoring capabilities.
Get a free risk assessment → /book-an-appointment/ · 251-313-0411 · solutions@callcastle.tech
Frequently asked questions
What does MSSP stand for?
Managed security services provider: a company that delivers outsourced cybersecurity monitoring, management and response.
What is the difference between an MSP and an MSSP?
An MSP manages your IT so it runs smoothly. An MSSP manages your security so threats are detected and stopped. Many providers, including Castle, offer both together.
What services does an MSSP provide?
Common services include endpoint detection and response, email security, firewall and network security management, vulnerability scanning and patching, security awareness training, and incident response.
What is EDR in cybersecurity?
Endpoint detection and response is software that continuously monitors computers and servers for suspicious behavior, isolates compromised devices, and gives security teams the data to investigate and respond.
Is EDR better than antivirus?
EDR goes further than traditional antivirus. Antivirus mostly blocks known malware. EDR also detects unusual behavior, such as ransomware or misuse of stolen credentials, and supports response and investigation.
Do small businesses need an MSSP?
Most do. Small businesses are frequent targets of phishing, business email compromise and ransomware, and an MSSP provides security expertise and monitoring they couldn't staff in-house.
Does Castle Technology Partners offer MSSP services?
Yes. Castle provides managed IT and cybersecurity, including EDR, email security and incident response, to businesses across the Gulf Coast. Call 251-313-0411 or email solutions@callcastle.tech.
Can an MSP handle cybersecurity, or do you need an MSSP?
An MSP can handle security tasks such as patching, access management, backup oversight, and endpoint protection when those services are included in its scope. An MSSP focuses on security monitoring, threat investigation, and incident response. The labels alone do not establish the level of protection.
Ask who reviews alerts, when monitoring is staffed, how incidents are escalated, and what response actions are covered. Businesses with greater security needs may use an MSP and MSSP together, or one provider with clearly defined capabilities and responsibilities.