Best IT MSP · Buyer's Guide

Managed SOC and MDR Services: A Buyer's Guide

A managed SOC (security operations center), often sold as SOC as a service or SOCaaS, gives you 24/7 threat monitoring, detection, and response from an outside team, on a subscription. It does what an in-house SOC does, including monitoring, threat hunting, and incident response, without the cost of building one. MDR is the active detect-and-respond service such a SOC delivers.

Reviewed by the Best IT MSP research team · Updated 2026-06-18

What is a managed SOC (SOC as a service)?

A managed SOC, also called SOC as a service or SOCaaS, is a model where a third-party provider operates and maintains a fully managed security operations center for you, on a subscription, usually via the cloud. It delivers the functions of a traditional in-house SOC: 24/7 network monitoring, log management, threat detection and intelligence, incident investigation and response, reporting, and compliance support.

Businesses buy it because attacks are constant and expensive: reported cybercrime losses topped $16 billion in a year[1], and almost no small or midsize firm can staff a 24/7 security team, especially with a global shortfall of about 4.8 million cybersecurity professionals[2].

Best IT MSP does not operate a SOC. We are an independent directory that vets and merit-ranks providers. This guide explains the model, then helps you shortlist verified firms.

Managed SOC vs MDR vs SIEM vs EDR

These terms get tangled. Here is the clean version:

  • SOC (security operations center). The team and tooling that watches for and responds to threats, 24/7.
  • Managed SOC / SOCaaS. That SOC, delivered as an outsourced subscription service.
  • MDR (managed detection and response). The active service of hunting, detecting, and responding to threats. A SOC typically delivers MDR. MDR is outsourced by definition; a SOC can be in-house or outsourced.
  • SIEM. The log-collection and correlation tool a SOC uses. It is a component, not the whole service.
  • EDR. Endpoint detection and response, a tool that protects devices. A SOC uses EDR plus other signals.

What a managed SOC does

  • Continuous proactive monitoring across endpoints, network, cloud, and logs.
  • Alert ranking and triage so real threats are separated from noise.
  • Threat detection and intelligence using current attacker behavior.
  • Incident response, acting as first responder to contain attacks.
  • Recovery and remediation coordination after an incident.
  • Log management and root-cause investigation.
  • Compliance support for frameworks like SOC 2, HIPAA, and PCI.

Benefits of a managed SOC

  • 24/7 coverage you could not staff in-house.
  • Faster detection and response, which limits breach damage.
  • Lower total cost than building and running an in-house SOC.
  • Access to scarce expertise and current threat intelligence.
  • Faster security maturity and easier compliance.

The stakes are high: the average data breach cost $4.88 million in 2024[3], so faster containment pays for the service many times over.

In-house SOC vs managed SOC: when each makes sense

A managed SOC fits most small and midsize businesses, and many larger ones, because 24/7 security staffing is expensive and hard to retain. An in-house SOC can make sense for very large organizations with strict data-control needs and the budget to staff three shifts. Many enterprises run a hybrid: an internal team for business context, a managed SOC for round-the-clock coverage and surge capacity. A managed SOC is usually part of broader cybersecurity services.

How to choose a managed SOC / MDR provider

  • Do they provide genuine 24/7 monitoring and active response, not just alerts?
  • How fast are their detection and response times, in writing?
  • Do they integrate with your existing security tools and cloud?
  • Are their analysts certified, and do they serve businesses your size and industry?
  • Do they support your compliance frameworks and provide clear reporting?

Shortlist three, ask each the same questions, and compare. To start from a vetted, merit-ranked list, browse providers by city in the Best IT MSP directory.

Frequently asked questions

What is a managed SOC (SOC as a service)?
A managed SOC, or SOC as a service (SOCaaS), is when a third-party provider runs a fully managed security operations center for you on a subscription. It delivers 24/7 monitoring, threat detection, incident response, log management, and compliance support, giving you an enterprise-grade SOC without building one in-house.
Is SOC as a service the same as MDR?
They overlap but are not identical. MDR (managed detection and response) is the active service of hunting, detecting, and responding to threats, and it is outsourced by definition. A SOC is the team and tooling that delivers that, and it can be in-house or outsourced. A managed SOC typically provides MDR as part of the service.
Is SOC as a service the same as a managed SIEM?
No. A SIEM (security information and event management) is a tool that collects and correlates security logs. It is a component of a SOC, not the whole service. A managed SOC adds the people, processes, threat intelligence, and response that turn SIEM alerts into action.
What is the difference between MDR, EDR, and a SOC?
EDR (endpoint detection and response) is a tool that protects individual devices. A SOC is the broader team and tooling that monitors and responds across your whole environment, using EDR plus network, cloud, and log signals. MDR is the managed service of detecting and responding, usually delivered by a SOC.
How much does a managed SOC cost?
Managed SOC and MDR services typically run from several hundred to a few thousand dollars per month for a small or midsize business, depending on the number of users and devices, data volume, and response level. It is almost always far cheaper than staffing a 24/7 in-house SOC.
When should a business outsource its SOC instead of building one?
Most small and midsize businesses should outsource, because staffing a 24/7 SOC across three shifts is expensive and hard given the cybersecurity talent shortage. Building in-house makes sense mainly for very large organizations with strict data-control needs and the budget to run it. Many enterprises use a hybrid of both.

Related insights

EDR vs Antivirus: What Is the Difference? MDR vs EDR: Which Does Your Business Need? What Is an MSSP? Virus Removal vs Modern Endpoint Protection SMB Cybersecurity: Where to Start

Sources

  1. FBI Internet Crime Complaint Center (IC3), Annual Internet Crime Report. https://www.fbi.gov/news/press-releases/fbi-releases-annual-internet-crime-report
  2. ISC2, 2024 Cybersecurity Workforce Study. https://www.isc2.org/research
  3. IBM, Cost of a Data Breach Report 2024. https://www.ibm.com/reports/data-breach

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