Paessler PRTG Network Monitor AlternativesOnly apps categorised as Website Monitoring Tools

Netdata collects metrics per second and presents them in beautiful low-latency dashboards. It is designed to run on all of your physical and virtual servers, cloud deployments, Kubernetes clusters, and edge/IoT devices, to monitor your systems, containers, and applications.

Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of PagerDuty, Server Density, Pingdom and Nagios without their cost and complexity.

Enterprise-ready monitoring solution that provides unparalleled flexibility for IT to address both immediate and unforeseen operational issues, including infrastructure and IT processes.

Monitis is a Cloud monitoring and IT analytics service offering Website Monitoring, Server Monitoring, Network Monitoring, Application Monitoring, Cloud Monitoring, and Custom Monitoring.

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.

Proactively monitor your websites and online services. Receive immediate notification when a problem is detected so you can quickly resolve the root cause and prevent potential escalation.

CloudMonix provides advanced cloud monitoring and automation for applications and services deployed on the Microsoft Azure and AWS platforms and built with MSPs, CSPs and DevOps in mind.