One of the most popular alternatives to Nagios is Zabbix, which is free and open source. Other popular alternatives are Beszel, Netdata, Datadog and Better Stack. There's no shortage of Network Monitors like Nagios, with more than 100 alternatives for Linux, Windows, the web, self-hosting and Mac.
IT Asset Tool is a powerful free software to inventor and monitor your network. It's easy approach allows to operate in a short time. With an essential interface, IT Asset Tool analyzes all windows hosts including their software and hardware features for an efficent...
All-in-one server, uptime, and status page monitoring with built-in AIOps. One command auto-discovers 30+ services on Linux and Windows; 1-minute checks, 20+ alert channels, and an MCP server for Claude, Cursor, and other AI agents. Free for 2 servers and 8 checks.
United States
Diagnose network performance problems in real-time with Intermapper, network monitoring software from HelpSystems. Powerful, reliable, and user-friendly, Intermapper helps network professionals stay ahead of outages by monitoring the performance of all your physical and virtual...
United States
Total Network Monitor 2 is a network monitoring software program that is designed to continuously monitor your local network, individual computers, and services that require careful attention and thorough control.
Belarus
Open source observability platform. SigNoz helps developers find issues in their deployed applications & solve them quickly.
United States
Uptime monitoring and status pages for indie SaaS and production AI agents (OpenClaw, agent APIs) — setup in minutes, not another observability suite.
Agentless server monitoring software - monitor CPU, disk, memory, network, etc. Distributed Monitoring of Windows, Linux and networks. 30-day FREE trial!
United States
LogMint is a lightweight observability platform for SaaS developers and startups. Track logs, metrics, audit events, dashboards, and alerts all from a single SDK.
Agentless monitor covers most of the aspects of monitoring like JAVA / J2EE application monitoring, server monitoring, database monitoring, transaction monitoring, network monitoring, log monitoring and system monitoring and last, but not the least is available for free.
United States
Open Source (GPLv3) Network Monitoring for Windows, Linux & Android. Simple setup, auto-detects running services, runs checks concurrently, open port scanning and alerting. Written in C++ & Qt 5.
Sophisticated Uptime Monitoring for your Apps, DBs, IT systems, and business services. Get pro-active alerts and fix incidents with ease without the noise.
United States
