EDR is a tool. MDR is a managed service. The question is whether you have the team to run one without the other.
Endpoint Detection and Response gives the environment detection capability. Managed Detection and Response provides the analyst layer that makes detection useful: triage, investigation and response, available around the clock. For organisations without a dedicated security team or SOC capability, EDR alone leaves the gap between alert and action entirely unaddressed.
See the capability differences side by sideThese are not competing alternatives in the same category. EDR is a technology that detects threats on endpoints. MDR is a service that operates on top of detection technology and adds the human coverage and response workflow that a tool alone cannot provide. This page compares the two for Australian IT and security buyers, and shows where MDR sits inside a broader managed cyber security service.
EDR is the tool. MDR is the service that operates it with human analysts behind the alerts.
The starting point for any comparison is being clear about what each one is — and is not.
- EDR (Endpoint Detection and Response) — a software tool deployed on endpoints. Collects process, network and file activity. Detects threats based on behavioural rules and threat intelligence. Enables response actions on the device. Generates alerts. Does not triage them, investigate them, or act on them without a human behind it.
- MDR (Managed Detection and Response) — a managed service that typically uses an EDR tool as part of its detection layer and adds 24/7 human analyst oversight. Analysts triage alerts, investigate confirmed threats and coordinate response. MDR provides the operational layer that EDR requires but cannot itself supply.
EDR provides telemetry and detection. MDR adds the analyst layer that makes detection operational.
The capability gap is best understood as two columns: what the tool does on its own, and what the managed service adds on top of it.
- Installs a lightweight agent on endpoints (workstations, servers, laptops) to collect telemetry on process execution, network connections, file modifications and registry changes
- Detects threats based on behavioural rules, threat intelligence feeds and machine learning models trained on known attack patterns
- Enables response actions directly on the endpoint: process isolation, file quarantine, network containment, forensic data collection
- Produces alerts when suspicious activity matches detection rules. The quality and volume of alerts depend on the platform and its tuning
- Does not investigate alerts, determine whether they are genuine threats, or coordinate a response across multiple systems
- Requires a person with security expertise to review, prioritise and act on what the tool surfaces
- Deploys endpoint detection capability as part of the service and typically includes identity and email telemetry alongside endpoint coverage
- Applies human analyst triage to every confirmed alert: distinguishing genuine threats from false positives, determining scope and likely cause
- Investigates confirmed incidents to understand what happened, what systems are affected and what the appropriate response path is
- Coordinates response and containment actions, escalating to the client environment for decisions that require client authorisation
- Operates continuously: 24/7 coverage means incidents detected overnight or on weekends are triaged and actioned, not queued until Monday morning
- Provides reporting on detection activity, incident summaries and response outcomes suitable for governance, insurance and leadership review
An endpoint detection tool is designed to surface threats. It is not designed to respond to them.
The alert an EDR platform generates contains information about suspicious activity. What happens next — whether that activity is investigated, whether it is a real threat, and what containment is required — is entirely dependent on who is watching and when.
Most organisations running EDR alone are not operating it at its designed effectiveness. Alerts accumulate in a queue. The security-aware person on the team reviews them when time permits, which is rarely the same day, and rarely outside business hours. Incidents that begin as a single alert on a Thursday evening become a material event by Friday morning.
The questions EDR alone cannot answer:
EDR platforms generate a mix of genuine threats and false positives. Without analyst triage, every alert requires the same manual investigation effort. In practice, most get skipped. Real threats hide in the noise.
EDR surfaces the first indicator. Understanding the full scope of an incident — what lateral movement has occurred, what credentials may be compromised, what systems are at risk — requires investigation that EDR alone does not perform.
EDR has no escalation path. There is no defined process for who is called, with what authority, at 2am on a Sunday when an alert indicates active cyber attack staging behaviour.
EDR provides per-endpoint visibility. Correlating activity across the environment to understand whether an incident is isolated or coordinated requires a layer of analysis that the tool does not provide without an analyst behind it.
Capability differences in plain terms.
The same comparison reframed as direct paired statements, dimension by dimension.
- Scope — endpoint telemetry, detection rules and response actions on the device
- Triage — alerts generated. Triage is performed by whoever on the internal team has time and security expertise
- Coverage — detection continues 24/7. Response depends on whether someone is monitoring and available to act
- Investigation — the tool provides telemetry. Investigation requires a security analyst to interpret it
- Response — response actions on the endpoint are available. Executing them requires an authorised person to decide and act
- Telemetry coverage — endpoint-focused. Identity and email telemetry require separate tooling and monitoring
- Best for — organisations with a dedicated security team or SOC capability able to monitor, triage and respond to alerts continuously
- Scope — detection capability plus 24/7 analyst triage, incident investigation and coordinated response
- Triage — every confirmed alert triaged by a human analyst. False positives filtered. Real threats escalated immediately
- Coverage — analyst coverage is continuous. Incidents detected at 3am are investigated and responded to at 3am
- Investigation — investigation is part of the service. Scope, cause, affected systems and response path are determined by the analyst
- Response — response is coordinated through the service. Containment actions within agreed scope are taken without waiting for business hours
- Telemetry coverage — most MDR services include identity and email monitoring alongside endpoint coverage
- Best for — organisations without a dedicated security team or SOC capability that need the outcome of continuous monitoring and response
Buying both separately is usually not required.
Most MDR services deploy their own endpoint detection agent as part of what they deliver. The EDR tool is the detection layer that feeds telemetry into the managed service. When an organisation engages an MDR provider, it is typically getting endpoint detection included as part of the service, not as a separate purchase.
Where this gets more complex is when an organisation already has an EDR deployment and wants to add managed analyst coverage on top of it. Whether this is possible depends on whether the MDR provider supports the existing platform. Some MDR providers require their own agent. Others can operate on top of an existing EDR deployment if the platform is on their supported list.
The practical question when evaluating MDR is not “do I also need EDR?” It is “does the MDR service deploy its own agent, and if I already have an EDR tool, is it supported?”
XDR broadens the telemetry. The human-analyst requirement does not change.
XDR (Extended Detection and Response) is a platform that integrates telemetry from endpoint, identity, email, network and cloud sources into a single detection and correlation engine. It broadens the visibility that EDR provides at the endpoint level.
XDR is still a technology platform. Like EDR, it generates detections that require a human to triage and respond. MDR can operate on top of an XDR platform in the same way it operates on top of an EDR tool. The broader telemetry improves detection coverage, but the human analyst layer is still what converts detections into operational response.
- EDR — endpoint telemetry and detection. The foundation of most detection stacks.
- XDR — extends detection across endpoint, identity, email and cloud in one platform. More visibility, same human-layer requirement.
- MDR — the managed service that operates on top of EDR or XDR and provides the analyst coverage, triage and response that platforms alone do not.
MDR is the detection-and-response component of a broader managed cyber security service.
For Australian organisations, Inlight IT delivers MDR-grade detection and response capability as part of Managed Cyber Security — the service that provides the deeper security operating layer above the managed IT baseline.
A managed cyber security service includes MDR as one component alongside identity governance, Microsoft 365 security posture management, backup recoverability oversight, security evidence and reporting for insurance and customer due diligence, and escalation and remediation coordination across the wider posture. A full explanation of what MDR is and how it works is on the Managed Detection and Response page.
The conditions where each works.
The honest test is who is actually available to operate the EDR tool at its designed effectiveness. The two columns below describe the operating conditions where each model fits.
- The organisation employs dedicated security analysts who are available to monitor, triage and respond to alerts continuously, including after hours and on weekends
- The internal team has the security expertise to investigate confirmed threats, determine scope and execute containment without external support
- Alert volumes are manageable within the team's capacity and no significant alerts go uninvestigated for meaningful periods
- The organisation has a documented incident response process with clear escalation paths that is actually tested and followed
- The IT team manages infrastructure and general IT but does not have a dedicated SOC capability or security team for continuous alert monitoring
- After-hours coverage is a gap: alerts generated overnight, on weekends or during leave periods are not reviewed until the team returns
- Cyber insurance or customer due diligence requires documented 24/7 monitoring and incident response capability that the internal team cannot demonstrate
- A security incident or near-miss has revealed that the gap between detection and response was measured in hours or days rather than minutes
- Essential Eight uplift has improved prevention controls but detection and response capability remains undeveloped alongside them
The honest assessment for most Australian organisations outside the enterprise segment: the conditions under which EDR alone is sufficient — a staffed, capable, continuously available security team or SOC capability — describe a function that most do not have and cannot justify building. MDR exists to fill that gap at a cost that is practical for the organisations that need it most.
If no one in your organisation can be named as the person who monitors, triages and acts on an alert at 2am, the right-hand column is describing your environment.
Test the coverage →Common situations, and what each typically points to.
The decision usually comes down to which of the situations below most closely matches the environment. Open the one that reads like yours.
EDR alone may be sufficient. Focus on platform tuning and response process quality.
MDR closes the coverage gap your current EDR deployment leaves open.
MDR includes endpoint detection as part of the service. No separate EDR purchase required.
MDR provides the documented monitoring and response capability the question is asking about.
Check whether the MDR provider supports Defender as a telemetry source. Some do; others require their own agent.
Assessment first to establish the prevention baseline, then MDR to provide the detection layer alongside it. See the Essential Eight Assessment.
The Inlight IT view on MDR vs EDR.
The MDR vs EDR question is usually settled by a simpler question: is there someone with the time, expertise and authority to act on an EDR alert at the moment it matters?
For most Australian organisations, the honest answer is no. The IT team is competent at managing infrastructure. They are not staffed to run a continuous detection workflow. An EDR tool in that environment collects telemetry, generates alerts and waits. The alerts accumulate. Some get investigated. Most do not. The tool is doing its job. The operational layer it requires is missing.
That is why Inlight IT does not sell EDR as a destination. It is a detection layer inside a broader service. The detection-and-response capability that MDR provides is delivered as part of Managed Cyber Security, where the operational layer behind the detection — analyst triage, identity monitoring, response coordination, evidence and reporting — is the service the client is actually buying.
Detection capability without response discipline is observation. MDR turns observation into an operational process with defined ownership and coverage when it matters.
Questions Australian IT managers and security buyers ask when evaluating endpoint and managed detection options.
Is MDR a replacement for EDR?
Do you need an EDR if you have MDR?
Is MDR better than EDR?
What is the difference between EDR, XDR and MDR?
Is Microsoft Defender an EDR or MDR?
Is SentinelOne MDR or EDR?
Does MDR replace antivirus?
How is MDR delivered by Inlight IT?
MDR-grade detection and response, with the response layer behind it.
Know whether anyone acts when the alert fires.
Discuss Managed Cyber Security