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NaemonNagios XI
Free

Free community project.

 Paid

Perpetual license priced per monitored node, with a 30-day free trial.

Linux, Self-hosted Self-hosted
  • Drop-in successor for Nagios users
  • Bug fixes and performance work on the Nagios 4 core
  • Monitors servers, network devices and applications from one self-hosted install
  • Web config wizard and dashboards simplify setup compared to raw Nagios Core
  • Configuration follows the older Nagios style
  • Needs a server to run on
  • Perpetual per-node licensing can get expensive as infrastructure grows
  • Proprietary layer on top of Nagios Core, so it is not itself open source
Self-hosted Self-hosted, Downloadable app
Open source Closed 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

Checked September 24, 2026

Checked September 22, 2026

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