Prometheus
Open-source system monitoring with a time-series database and query language is provided by Prometheus.
About Prometheus
Prometheus is an open-source monitoring and alerting toolkit, with components available under the Apache 2 License. It records numeric metrics as time series for queries, alerts and dashboards. Each server operates independently and stores samples locally, without relying on distributed storage. It is not a good fit when data must be 100% accurate, such as per-request billing, because collected samples may not be detailed or complete enough.
Pricing is not clearly stated.
Key features
- Time series are identified by metric name and key-value label pairs.
- PromQL queries, correlates and transforms time series data.
- Alerting rules use PromQL, and a separate Alertmanager handles notifications and silencing.
- Scrapes metrics over HTTP and accepts pushed metrics through an intermediary gateway.
- Discovers targets through service discovery or static configuration.
- Supports multiple graphing and dashboarding modes.
- Official and community instrumentation libraries cover most major languages.
- Hundreds of official and community integrations extract metrics from existing systems.
Best for: Machine-centric monitoring and monitoring of highly dynamic service-oriented or microservice architectures.
Prometheus at a glance
- Website
- prometheus.io
- Category
- Development › Developer Tools
- Type
- App
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
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