NetCrunch is described as 'Agentless IT monitoring built to scale - NetCrunch offers a powerful, policy-driven platform for real-time visibility across your entire infrastructure system' and is a Network Monitor in the network & admin category. There are more than 100 alternatives to NetCrunch for a variety of platforms, including Web-based, Windows, Linux, SaaS and Self-Hosted apps. The best NetCrunch alternative is Zabbix, which is both free and Open Source. Other great apps like NetCrunch are Uptime Kuma, Nagios, Datadog and Tianji.
LANState is a simple NMS with the network topology mapping and device monitoring functions. Add hosts to a graphical network map and monitor their state in the real time. Receive failure notifications when hosts and services go down.
The Sensu Open Source Project (a.k.a. "Sensu Core") intends to provide an open framework for building comprehensive monitoring solutions, without imposing restrictions or being overly opinionated.
Silent Down is a website uptime and performance monitoring platform, to keep an eye on your application and instantly alert you if any issues arrive.
BLËSK is a suite of applications for network monitoring and management. All of the applications within BLËSK are finely tuned for the purpose having all your network monitoring applications running smoothly on a single machine.
PingRobot is a website monitoring service that alerts you when websites are not operational and when they come back online.
Trafikito is free Linux servers monitoring solution which by default checks RAM, disk space, CPU and sends you an email if something is wrong.
Application Monitoring that finds what you can't see in charts. Identify slow database queries, N+1s, sources of memory bloat, performance abnormalities, and more.
ServersUp.net can check a number of different services on different hosts to make sure those services are up and running. It will send alerts when the statuses change.
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