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RRDtoolPrometheus
Free

Free and open source under GPL-2.0-or-later with the RRDtool FLOSS exception.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

Windows, Linux, Command line Windows, macOS, Linux, Self-hosted
  • Stores time-series data in a fixed-size database
  • Generates graphs from collected metrics
  • Label-based data model and PromQL make ad-hoc questions easy to answer
  • Pull model needs no agent configuration beyond exposing a metrics endpoint
  • Designed for time-series logging and graphing rather than general-purpose monitoring
  • Local storage is not clustered; long retention needs Thanos, Mimir or similar
  • Pull model does not suit short-lived jobs without a push gateway
Downloadable app Self-hosted
Open source Open source
License: GPL-2.0-or-later WITH RRDtool-FLOSS-exception-2.0 License: Apache-2.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.