What is XDR?
Extended Detection and Response (XDR) is a security platform that collects and correlates data across multiple layers, including endpoints, networks, cloud workloads, email, and identity, into a single system. By connecting signals that would otherwise sit in separate tools, it gives security teams a broad, unified view of what is happening across the whole environment. XDR is often described as the next evolution of EDR, extending the same detect-and-respond approach beyond the endpoint.
Why does correlating data across layers matter?
- Catches multi-stage attacks: Sophisticated threats hide in the gaps between siloed tools and spread over time. XDR connects the dots so these attacks are surfaced instead of slipping through.
- Faster investigation: Analysts can follow an attacker’s full path across the environment in one console, without jumping between separate products.
- Less alert fatigue: Related alerts are grouped into a single incident, so teams chase fewer, higher-quality leads.
How is XDR different from EDR and SIEM?
- vs. EDR: EDR only sees the endpoint. XDR adds network, cloud, email, and identity data for wider visibility.
- vs. SIEM: A SIEM aggregates large volumes of logs for visibility and compliance. XDR adds built-in cross-layer correlation, detection, and automated response on top.
How does XDR fit with MDR?
- Built on EDR: XDR uses endpoint telemetry as a foundation and broadens it across other layers.
- Often delivered through MDR: Managed Detection and Response services frequently run on an XDR platform, pairing the technology with human analysts who monitor, hunt, and respond around the clock.