[simon1573]

I've been using updown.io for my side-projects the last 18 months and I'm very happy with the service. One comment pointed out that status monitoring is expensive - I think I've payed a grand total of $5 for these 18 months, so I don't agree at all.

[Brajeshwar]

I love and would recommend updown.io. I use it for both personal and work. Recently, my personal version expired its free tier and I was in no hurry to upgrade. Nothing was mission critical, and I wanted to wait for the year to get over.

They drop me a good amount of credit to get my account running while I wait to upgrade.

[shaicoleman]

updown.io is great - simple, reliable and cheap.

[geerlingguy]

Throwing my old but reliable service in the mix, too: servercheck.in — I kicked it off with a Show HN about a decade ago, and it brings in about $170 MRR — enough to pay for the globally-distributed servers it runs on :)