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Nagios Core vs NetXMS: catalog facts
Nagios Core	NetXMS
Free Free and open source. Hosting, hardware and any external services are separate.	Freemium The open-source edition is free; enterprise capabilities and services are available…
Self-hosted	Self-hosted
Runs plugin-based checks Tracks availability and sends notifications	Collects device and agent data Provides monitoring and management interfaces
Configuration and many checks need manual setup or additional plugins.	Enterprise services and editions have separate terms.
Self-hosted	Self-hosted
Open source	Open source
License: GPL-2.0	License not stated
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.