Cost / License
- Free
- Open Source (AGPL-3.0)
Application type
Platforms
- Self-Hosted
- Docker
United States




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.




Middleware is a full stack cloud observability platform to bring all metrics, logs, and traces in one unified timeline to debug issues faster.




Server Monitoring and Down Alerts made easy! WIndows, Linux & macOS Monitor servers easily and receive alerts on CPU, RAM or downtime.

pgDash is a modern, in-depth monitoring solution designed for PostgreSQL. pgDash shows you information about every aspect of your PostgreSQL database server, collected using the open-source tool pgmetrics, and includes Diagnostics & support for Teams.




PagespeedPlus.com is a tool for measuring page speed insights scores at scale. Large websites and agencies now have the perfect tool for running automated scans and receiving alerts when their score is low.

When a server goes down, it costs not only money but also productivity loss and reputational damage. The majority of the servers go down because of a full disk. Logs are getting too big, or disk images cache grows without bounds.
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.
OpsiMate is an open source platform that provides comprehensive infrastructure monitoring, automation, and management tools. Transform complexity into clarity with our unified, intelligent platform.



A cloud-native observability platform built specifically for logs, metrics, traces, analytics, RUM (real user monitoring — performance, errors, session replay) designed to work at petabyte scale.

Fodaris is a self-hosted monitoring and observability platform built for homelabs and businesses. It monitors servers, Docker containers, network devices, websites, APIs, databases, and applications from a single dashboard.



