Handbook
What Is XDR? Extended Detection and Response Explained
What is XDR and how does it differ from EDR, SIEM, and MDR? Clear explanation of extended detection and response, with guidance on when XDR is right for your team.
XDR definition
XDR (Extended Detection and Response) extends endpoint detection to include network, cloud, email, and identity data sources. It provides cross-source correlation and unified investigation.
XDR vs EDR vs SIEM
EDR monitors endpoints only. SIEM aggregates logs from everywhere but investigation is manual. XDR bridges the gap with cross-source detection but is often vendor-locked.
Open XDR vs native XDR
Native XDR (CrowdStrike, Microsoft, Palo Alto) works best within one vendor ecosystem. Open XDR works across vendors but requires more integration effort.
Limitations of XDR
Vendor lock-in (native XDR). Limited to detection response automation often requires SOAR. Investigation still requires human analysts for complex threats.
XDR vs Agentic SOC
An agentic SOC goes beyond XDR by adding autonomous investigation and response. While XDR detects cross-source threats, an agentic SOC investigates and resolves them autonomously.
Put this into practice
See how Helxon applies these principles with autonomous investigation and response.