MDR vs XDR
A managed service versus a cross-domain detection technology.
XDR (extended detection and response) is a technology that correlates detection across endpoint, network, identity and cloud. MDR (managed detection and response) is a service in which a provider operates detection and response for you around the clock, often using XDR-style correlation. XDR is software; MDR is the operation of it, delivered as a service.
The short answer
XDR (extended detection and response) is a technology that correlates detection across endpoint, network, identity and cloud. MDR (managed detection and response) is a service in which a provider operates detection and response for you around the clock, often using XDR-style correlation. XDR is software; MDR is the operation of it, delivered as a service.
MDR delivers 24/7 detection, investigation and response as a managed service, combining detection technology with analysts who watch the environment continuously and contain real threats on the customer’s behalf.
- A managed service delivering an outcome
- Human-led investigation and response, around the clock
- Correlates endpoint, network, identity and cloud signals
- Removes the need to build an in-house SOC
XDR is a technology that unifies detection across multiple layers, correlating telemetry from endpoint, network, identity, email and cloud so a multi-stage attack is seen as one event. It still requires people to operate it.
- A technology, not a service
- Cross-domain correlation and coordinated response
- Reduces analyst workload but does not remove it
- Native (single-vendor) or open (multi-vendor) forms
Key differences
Where MDR and XDR diverge, at a glance.
| MDR | XDR | |
|---|---|---|
| What it is | A managed service | A technology / platform |
| Who operates it | The provider’s analysts, 24/7 | Your own team |
| Correlation | Across sources, operated for you | Across sources, operated by you |
| You need | A provider and access | Analysts to run the platform |
| Outcome | Threats detected and contained | Correlated alerts to investigate |
When to choose which
MDR fits organisations that want cross-domain detection and response without building the team to run it, turning the capability into an outcome delivered by a provider.
XDR fits organisations that already have a capable security operations team and want a platform to correlate detection across their environment themselves.
XDR and MDR are layers of the same detection strategy rather than rivals. XDR is the correlation technology; MDR is its operation. An organisation buying MDR typically gets XDR-style cross-domain detection plus the analysts to run it, which is why the two are often discussed together rather than chosen between.
A worked example: technology owned, but not operated
An organisation invests in an XDR platform that correlates endpoint, identity and cloud signals beautifully. Six months later it suffers a breach that the platform actually detected, because the correlated alert was never investigated: the small internal team could not cover nights and weekends, and the alert waited in a queue.
This is the recurring lesson of technology versus operation. XDR made the attack visible; without anyone watching, visibility alone did not prevent the breach. An MDR service would have investigated the same correlated alert in minutes and contained it. The technology and the operation are different purchases, and owning the first without the second leaves a gap.
Products versus services: which is which
XDR is a technology: platforms such as Microsoft Defender XDR, Palo Alto Cortex XDR and SentinelOne Singularity correlate detection across layers, but they still need people to operate them. MDR is a service that provides those people, along with the tooling and detection engineering, delivered around the clock.
In practice a strong MDR service uses XDR-style cross-domain correlation internally, operated by the provider’s analysts. So an organisation buying MDR typically gets the correlation capability and the operation together, rather than buying an XDR platform and then having to staff its round-the-clock use separately.
How MDR and XDR fit together
The cleanest way to think about it is that XDR is a how and MDR is a who. XDR is one way to detect threats across an environment; MDR is a way to have that detection, and the response to it, operated for you as an outcome. They are layers of the same detection strategy rather than competing choices.
For organisations without a mature, fully staffed security operations centre, MDR is usually the more direct path to effective detection and response, because it removes the burden of hiring and retaining analysts to run a platform at all hours. Those with strong in-house operations may instead run XDR directly and keep the operation internal.
Not sure which you need?
The right detection stack depends on your environment, your team and your risk. Precursor operates managed detection and response from a CREST-accredited security operations centre, so you get the outcome rather than another tool to run.
MDR vs XDR, answered
Common questions about how MDR and XDR differ and relate.
No. XDR is a technology that correlates detection across layers; MDR is a service that operates detection and response for you. MDR services commonly use XDR-style correlation, so they are complementary rather than alternatives.
Only if you have the team to run it. XDR reduces analyst workload through correlation and automation, but investigation and response decisions still need people available around the clock, which is what MDR provides.
It depends on whether you want to operate detection yourself or buy the outcome. Teams with mature in-house operations may run XDR directly; those without the staff for 24/7 coverage typically choose MDR, which includes the technology and the operation.
MDR often uses XDR-style correlation as part of how it detects threats, but MDR is broader: it is the managed operation of detection and response as a whole, including human investigation, threat intelligence and containment. Managed XDR describes operating one platform; MDR describes delivering the outcome.
Only if you have the team to run it around the clock. XDR reduces analyst workload through correlation and automation, but investigation and response decisions still need skilled people available at all hours, which is what MDR provides. Without that operation, XDR detects threats that may go unactioned.
EDR detects and responds on endpoints. XDR correlates detection across several layers including the endpoint. MDR is a managed service that operates detection and response, commonly using EDR and XDR technologies, so a provider’s analysts watch and act on your behalf continuously.