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Graylog vs Microsoft Sentinel

Graylog and Microsoft Sentinel are both open source siem solutions. Graylog open-source log management and SIEM platform with intuitive analytics, while Microsoft Sentinel cloud-native Azure SIEM with AI-powered detection and automated response. The best choice depends on your organization's size, technical requirements, and budget.

Updated Feb 2026

Summary

Choose Graylog if open-source core with generous free tier is your priority and teams needing cost-effective log management with SIEM capabilities and an intuitive user experience. Choose Microsoft Sentinel if deep native integration with Microsoft ecosystem matters most and microsoft-centric organizations wanting a cloud-native SIEM with deep M365 and Azure integration.

Choose Graylog if:

  • You value open-source core with generous free tier
  • You value intuitive UI with lower learning curve than Splunk
  • You value efficient resource utilization and storage
  • You want to avoid per-GB costs can spike with non-Microsoft data sources
  • You want to avoid kQL learning curve for teams used to other query languages

Choose Microsoft Sentinel if:

  • You value deep native integration with Microsoft ecosystem
  • You value cloud-native with no infrastructure to manage
  • You value free data ingestion for Microsoft 365 and Azure logs
  • You want to avoid smaller community and ecosystem than Splunk or Elastic
  • You want to avoid security features less mature than dedicated SIEMs

Feature Comparison

FeatureGraylogMicrosoft Sentinel
PricingFree (Open) / From $1,250/month (Operations) / Security customFrom $2.46/GB ingested (pay-as-you-go) / Commitment tiers available
Pricing ModelPer-node licensing (Operations and Security tiers)Per-GB ingested (with commitment tier discounts)
Open SourceYesNo
DeploymentCloud, Self-HostedCloud
Best ForTeams needing cost-effective log management with SIEM capabilities and an intuitive user experienceMicrosoft-centric organizations wanting a cloud-native SIEM with deep M365 and Azure integration
Centralized log management and collec...SupportedNot available
Security analytics and threat detectionSupportedNot available
Pipeline processing for data enrichmentSupportedNot available

Sources

Related

Full SIEM & Security Analytics guideGraylog AlternativesMicrosoft Sentinel AlternativesGraylog OverviewMicrosoft Sentinel Overview

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