Show HN: Checkup, an open-source uptime monitoring tool built for developers

Yeah, so Nagios does all of this, and it's been battle tested the last 20 years or so.

I would appreciate a side by side feature comparison between checkup and pingdom

Looks cool. I like its code based which I think may make it easier to keep it up to date than if it was external configuration file(s). I do really like how well tested Monit is though