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Naemon vs Checkmk: catalog facts
Naemon	Checkmk
Free Free community project.	Freemium Free open-source Raw edition, with paid Enterprise and Cloud editions.
Linux, Self-hosted	Self-hosted
Drop-in successor for Nagios users Bug fixes and performance work on the Nagios 4 core	Auto-discovery reduces manual setup for new hosts and services Supports both agent-based and agentless SNMP monitoring
Configuration follows the older Nagios style Needs a server to run on	Advanced features and scaling are gated behind paid commercial editions Self-hosted setup and tuning takes more effort than a hosted SaaS monitor
Self-hosted	Self-hosted, Downloadable app
Open source	Open source
License not stated	License not stated
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 September 24, 2026	Official website Full listing and sources Checked September 22, 2026

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