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Munin vs Cacti: catalog facts
Munin	Cacti
Free Free and open source.	Free Free and open source under the GPL.
Linux, Self-hosted	Linux, Web, Self-hosted
Useful graphs out of the box with little setup Over 500 plugins for common services	RRDtool storage keeps years of graphs in a fixed amount of disk Mature template and plugin ecosystem for network devices
Five-minute polling interval, not real-time Stable release links on the homepage date from 2021	Interface and workflow feel dated next to newer monitoring stacks Alerting requires plugins rather than being built in
Self-hosted	Self-hosted
Open source	Open source
License not stated	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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