What’s the difference between SIEM and XDR?
XDR and SIEM are similar in that they are both tools for threat detection, but they serve different functions. A few key differences between SIEM vs XDR include:
XDR vs SIEM: Core functionality
XDR focuses on host and endpoint identity. In practice, that means XDR is really just an EDR solution with a very lightweight and limited SIEM capacity, focused narrowly on endpoint security. It often doesn't monitor the internal movement of data at all.
SIEM's core functionality, by comparison, is one of data lake correlation. Its data logging focus is enterprise-wide, and tracks all data that moves around your operations, internally and externally. In the end, this means SIEM platforms tend to be more developed and more capable than XDR solutions. They also add a compliance capability not present in XDR or EDR. While XDR’s scope is limited to endpoints, pairing Huntress Managed EDR with Managed SIEM ensures both endpoint depth and enterprise-wide visibility, which XDR alone can’t match.
"XDR is basically EDR with a very lightweight, security-focused SIEM capability. The big delta is that SIEMs tend to be more developed, more capable, and primarily allow users to meet compliance business requirements."
—Nate O'Brien, Staff Product Manager
XDR vs SIEM: System architecture
XDR is EDR-based, while SIEM is typically rooted in analytics and data normalization. Both share the MITRE ATT&CK framework, but XDR's response is native, while SIEM typically integrates SOAR platforms for orchestration.
XDR vs SIEM: Detection speed and depth
In terms of detection, there’s not a huge difference between XDR and SIEM. Both operate on the principle of centralizing data and detecting threats based on that data.
Because XDR does have a lightweight, narrowly-focused SIEM capability, its detection speed is very similar, but its scope is limited to endpoints. SIEM can correlate across a broader data set and catch more complex attack patterns.
"XDR and SIEM both centralize data for threat detection, but the real difference comes down to scope. XDR stops at endpoints. Huntress Managed SIEM takes an extra step and correlates across the entire business environment, giving defenders a clearer picture of complex attacks."
—Nate O'Brien, Staff Product Manager
XDR vs SIEM: Response workflow
XDR's event response is typically automatic and built-in. Earlier generations of SIEM only detected anomalies and flagged them for human investigation. Today, modern SIEM platforms, like Huntress Managed SIEM, incorporate AI to automate many remediation tasks, only flagging those cases that require human investigation.
Modern SIEMs like Huntress don’t lag behind XDR when it comes to automation. In fact, Huntress SIEM integrates directly with our EDR and ITDR solutions, correlating data across all layers for higher-fidelity detections. That’s something XDR alone can’t deliver.
"Our SIEM is an integral part of the Huntress platform, and there is no “hand-off” of tickets or alerts. They go through the same process as EDR and ITDR tickets, and better still, they all correlate together to create higher fidelity detections."
—Nate O'Brien, Staff Product Manager
XDR vs SIEM: Cost & staffing considerations
This is where SIEM’s compliance capabilities really shine. A Managed SIEM, like the Huntress solution, makes meeting compliance requirements as easy as possible, while at the same time feeding into a world-class detection and SOC platform.
While XDR vendors sometimes pitch simplicity and cost-effectiveness, e Huntress Managed SIEM is designed to be just as efficient, and often at a similar cost, but with the added bonus of compliance readiness and SOC oversight. That means more protection and value than an XDR license alone.
