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LibreNMS vs Cacti: catalog facts
LibreNMS	Cacti
Free Free and open source. Hosting, hardware and any external services are separate.	Free Free and open source under the GPL.
Self-hosted	Linux, Web, Self-hosted
Collects device information and performance data Provides alerting and historical graphs	RRDtool storage keeps years of graphs in a fixed amount of disk Mature template and plugin ecosystem for network devices
Device visibility depends on supported protocols and credentials.	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: GPL-3.0	License: GPL-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
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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