Nagios is described as 'Powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues' and is a popular Network Monitor in the network & admin category. There are more than 100 alternatives to Nagios for a variety of platforms, including Linux, Windows, Web-based, Self-Hosted and Mac apps. The best Nagios alternative is Zabbix, which is both free and Open Source. Other great apps like Nagios are Netdata, Beszel, Better Stack and Datadog.
SeaLion is a FREE Linux server monitoring and debugging tool for easy troubleshooting across hundreds of servers. View raw output of critical events across your servers and debug your server issues. Latest version shipped with 5 default services.
IPNetwork Monitor is self-hosted network monitoring software for tracking uptime and performance on Windows, Linux, and other OS.
Amon is an all-in-one server monitoring tool. Amon monitors you cloud, system, process and applications metrics with zero configuration.
EU-hosted AI observability platform. Monitor LLM costs, latency, and compliance in one platform. GDPR and AI Act compliant.
PostgreSQL performance monitoring with 75+ automated health checks, cluster-aware index advisor, and extension monitoring for TimescaleDB, pgvector, and PostGIS.
Watch Cortex is an autonomous Linux security platform with on-device AI reasoning. It detects threats, explains what’s happening, and responds automatically — all locally, with no cloud dependency.
Self-hosted network monitoring for MSPs, IT teams and homelabs. SNMP, services, websites, alerts, diagnostics. Free for 100 devices.
Bloonix is a software for monitoring IT infrastructures. With Bloonix everything can be monitored what is to be reached about a network connection and for which there is a Plugin. Hardware components can be also monitored on which Bloonix cannot be installed, as for example...
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