Grafana Loki
Horizontally scalable, multi-tenant log aggregation system inspired by Prometheus.
Grafana Loki is a log aggregation system designed to be cost-effective and Prometheus-compatible. Unlike Elasticsearch, Loki indexes only labels (not full text), making it dramatically cheaper to operate. Integrates natively with Grafana for visualization and Prometheus for correlation. Supports LogQL query language, alerting, and retention policies.
- Best for: Monitoring & Observability
- Pricing: Free and open-source (AGPL), Grafana Cloud from $8/mo
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Features
Alerting
Threshold and anomaly-based alerting
Log-based alerting rules
Dashboards
Visual dashboards for metrics and logs
Native Grafana integration for dashboards
Full-Stack APM
Application performance monitoring with traces, logs, and metrics
Log aggregation only, not full APM
Horizontal Scaling
Scale out across nodes and regions
Horizontal scaling via object storage
Integrations
Native integrations with other tools
Grafana, Prometheus, Tempo integrations
Log Aggregation
Centralized log collection and search
Centralized log aggregation with LogQL
Metrics
Time-series metric collection and storage
Label-based indexing (cost-efficient)
Multi-Tenancy
Isolation between teams and environments
Multi-tenant log isolation
Query Language
Custom query language for data analysis
Prometheus-compatible query language (LogQL)
Storage Backends
Flexible storage options (S3, local, cloud)
Object storage backends (S3, GCS, Azure, MinIO)
Best For
Find the right DevOps tools for your specific needs. Grafana Loki is featured in these buying guides: