The best Uptime Monitor alternative to Controlup is Sensu Core. It's not free, so if you're looking for a free alternative, you could try Sensu Core or CloudMonix. If that doesn't work for you, our users have ranked more than 25 alternatives to Controlup, but unfortunately only two of them are Uptime Monitor Services.
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.
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.
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