Microsoft Sentinel vs Graylog

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
How we compare:This comparison is based on official documentation, public pricing, community discussions, and aggregated user feedback, not hands-on testing by our team. We organize what real users and practitioners are saying across the web.

The Bottom Line

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 Microsoft Sentinel 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 Graylog 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

FeatureMicrosoft SentinelGraylog
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

Microsoft Sentinel AlternativesGraylog AlternativesMicrosoft Sentinel OverviewGraylog Overview