Naemon

Free#35 of 38 in Server Monitoring

Naemon: A flexible, plugin-based choice for Unix-focused teams that manage their own monitoring. Ranked #35 of 38 in Server Monitoring by our editors (6.0/10); pricing: Open source; best for plugin-based Unix service checks.

6.0/10★★★☆☆Editor score

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At a glance

• Editor score
  6.0 / 10
• Pricing
  Open source
• Best for
  Plugin-based Unix service checks
• Paid from
  Free
• Facts checked
  20 Sep 2026

• Where it wins

  • Supports active and passive checks for hosts and services
  • Covers network protocols, host resources, processes, and reachability
  • Includes Thruk and Livestatus for web access and querying

• Where it doesn't

  • Self-hosted deployment requires local administration
  • Local-resource monitoring generally requires an intermediary agent
  • Broader platform and integration coverage is limited

Our verdict on Naemon

Naemon is an open-source system and network monitoring application for teams that need to observe hosts, services, applications, and network resources. It runs scheduled active checks and processes passive results from external applications, with plugins extending coverage across HTTP, FTP, SSH, SMTP, POP3, CPU load, memory, disk usage, users, and running processes. Linux and Unix-like environments are the main deployment context, while Linux, Unix-like, Windows, and Netware hosts can be monitored.

Its strongest fit is a plugin-based monitoring model with both service and resource coverage. Teams can configure notifications for host or service problems and recoveries, event handlers for host and service events, host hierarchies, reachability detection, and redundant monitoring hosts. Network-service checks can generally run without an agent, while local-resource monitoring generally requires an intermediary agent. The suite also includes the Thruk web interface and Livestatus query interface, giving operators web access and a way to query monitoring data.

Naemon suits organizations that prefer open-source, self-hosted monitoring and have the technical capacity to manage plugins, hosts, checks, notifications, and supporting interfaces. Its hybrid active-and-passive approach is useful when external applications need to submit results alongside scheduled checks. Teams seeking a focused Unix-oriented monitoring system should find its architecture relevant, especially when protocol and process checks matter. It is a less natural choice for buyers prioritizing broad integrations, wider platform capabilities, or a managed service that minimizes local administration.

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Naemon pricing

Naemon fact sheet

Alternatives to Naemon

• CheckmkA broad monitoring platform with a free edition and high paid entry price.9.4
• ZabbixA broad monitoring platform with a free self-hosted edition and managed cloud options.9.3
• NetdataAffordable infrastructure visibility with per-second metrics, logs, alerts, and AI assistance.9.2

See all Naemon alternatives →

Featured on iTechGuides

Naemon is listed in our Server Monitoring directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update