Do I need a SIEM if I have NDR?

Not necessarily: many small and mid-sized companies get more from NDRNDR: network detection and response. Security monitoring that watches the traffic between devices and raises an alert when one behaves like an attacker. plus good endpoint protection than from a SIEMSIEM: security information and event management. A system that collects logs from many systems and looks for patterns across them. nobody has time to tune. A SIEM (security information and event management) collects and correlates logs from many systems: firewalls, servers, directories, cloud services. It is powerful when someone writes and maintains its searches, and heavy when nobody does. NDR (network detection and response) gives detections from network traffic without log engineering. The two answer different questions: the SIEM tells you who logged in where, NDR tells you what the devices did on the network. You may need a SIEM anyway if an auditor, a customer contract or a regulator expects central log retention, or once you have staff to use it. If you already run one, NDR alerts can feed it: NetSenX has SIEM export from the Business plan, so network detections arrive in the SIEM already explained.

This answer is part of the guide: NDR vs EDR vs SIEM (and XDR, MDR): how they differ

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