SIEM Tools Comparison: Splunk vs QRadar vs Microsoft Sentinel

Compare three leading SIEM platforms: Splunk Enterprise Security, IBM QRadar, and Microsoft Sentinel across features, pricing, and deployment options.

Market Overview

The SIEM market has transformed with cloud-native solutions challenging legacy on-premise platforms. Splunk remains the market leader by revenue, but Microsoft Sentinel and Elastic Security are gaining rapidly due to lower costs and cloud-native architectures.

Choose Splunk if: You have budget and need the most mature SIEM with the largest integration ecosystem.

Choose QRadar if: You need strong AI threat detection with on-premise or hybrid deployment.

Choose Sentinel if: You're in Azure and want the most cost-effective, scalable cloud SIEM.

[Sources: Gartner Magic Quadrant for SIEM 2025]