[WrtCdEvrydy]

Is there anything self hosted in this space?

[cuu508]

Yes, Healthchecks is open-source and can be self-hosted https://github.com/healthchecks/healthchecks

[jethro_tell]

Depending on your environment, i.e. if you have a metrics system in place already, I generally just post a success metric and alert on lack of success metrics.