Reference
What is MDR (Managed Detection and Response)?
Managed Detection and Response (MDR) is a cybersecurity service in which a 24/7 Security Operations Center (SOC) of human analysts monitors an organization's endpoint and network alerts (typically from an EDR product) and responds to threats in real time.
Quick answer
Managed Detection and Response (MDR) is a cybersecurity service in which a 24/7 Security Operations Center (SOC) of human analysts monitors an organization's endpoint and network alerts (typically from an EDR product) and responds to threats in real time.
Overview
MDR emerged as the industry realized that Endpoint Detection and Response (EDR) tools are only as useful as the humans watching their alerts. Most small and mid-size businesses cannot staff a 24/7 SOC internally — the labor cost alone runs $600,000+ annually for a modest three-analyst rotation. MDR consolidates that capability across many client organizations, making 24/7 human threat response affordable at SMB scale. By 2026, MDR is a baseline expectation for cyber insurance renewals and for any business handling regulated data (HIPAA, PCI, CMMC).
What MDR (Managed Detection and Response) includes
- EDR tooling
- The underlying endpoint detection product (SentinelOne, CrowdStrike, Microsoft Defender for Business, Huntress) that generates alerts.
- 24/7 SOC analysts
- Trained security professionals who triage alerts, distinguish real threats from noise, and take action.
- Documented response actions
- Pre-agreed containment steps — isolating a compromised endpoint, disabling a compromised account — the SOC can take without waiting for client approval.
- Threat hunting
- Proactive searches for indicators of compromise the automated tooling didn't flag.
- Reporting
- Monthly incident reports plus escalation notifications to the client team.
Common misconceptions
Claim
MDR is the same as EDR.
Reality
EDR is the tool. MDR is the humans monitoring the tool. Tool without humans is a dashboard nobody reads.
Claim
MDR means the vendor will fix any security issue.
Reality
MDR handles detection and initial response (containment). Remediation — restoring systems, rebuilding what was compromised, forensics — is a separate scope, typically handled by your MSP or a dedicated incident response firm.
Claim
AI is replacing MDR SOC analysts.
Reality
Not yet. AI accelerates triage but the response decisions — isolate vs monitor, escalate to client vs handle silently — are still human calls in every serious MDR provider in 2026.
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