What is a SIEM?
A SIEM (Security Information and Event Management) is a security platform that ingests, normalizes, stores, and searches security log data from across an organization's infrastructure, providing the central detection and historical record for the SOC.
Updated 2026-05-19
SIEMs perform three functions: log aggregation and storage, detection (correlation rules and analytics that surface alerts), and search (the analyst's tool for investigation). The dominant SIEM products are Splunk, Microsoft Sentinel, Elastic, Chronicle, Exabeam, and Sumo Logic. SIEM economics are driven by data volume, every gigabyte ingested costs money, which creates a tension between detection coverage and budget.
How Command Zero handles SIEM.
Command Zero is not a SIEM. The platform does not store logs or charge by data volume. Command Zero connects to the existing SIEM (and to other data sources directly) using the Federated Data Model, read-only API queries that pull only the data needed for the current investigation. Customers keep their SIEM investment; Command Zero adds the investigation layer that the SIEM does not provide. Integration with Splunk, Microsoft Sentinel, Elastic, Chronicle, and others is supported day one.
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