Prometheus is an open source systems monitoring and alerting toolkit originally built at SoundCloud.

Prometheus's main features are:
- a multi-dimensional data model (time series identified by metric name and key/value pairs)
- a flexible query language to leverage this dimensionality
- no reliance on distributed storage; single server nodes are autonomous
- time series collection happens via a pull model over HTTP
- pushing time series is supported via an intermediary gateway
- targets are discovered via service discovery or static configuration
- multiple modes of graphing and dashboarding support