TL;DR - Prometheus
- Prometheus is an open-source monitoring system with a time-series database
- It collects metrics, provides alerting, and powers Grafana dashboards
- Completely free and open-source
Pricing: Free forever
Best for: Individuals & startups
Score: 92/100
Pricing Plans
Most Popular
Free
Free
Open source
- Time series DB
- PromQL
- Alerting
- Service discovery
About Prometheus
Prometheus monitors systems with time-series metrics. Pull-based collection, powerful queries—the monitoring system Kubernetes was built around.
The data model is proven. The ecosystem is vast. The Kubernetes integration is native.
Infrastructure teams use Prometheus because cloud-native monitoring expects it.
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Prometheus FAQ
Yes, Prometheus is completely free and open source. Apache 2.0 license. CNCF graduated project.
Prometheus is a monitoring and alerting toolkit. Time-series database for metrics. Standard for Kubernetes monitoring.
Prometheus is free but needs management. Datadog is managed but expensive. Prometheus for budget; Datadog for convenience.
Prometheus Query Language. Query and aggregate metrics data. Powerful but has a learning curve.