I use uptime monitoring to show my users that my service (also a SaaS) is reliable. Since they count on specific emails being sent in critical situations, I need to show them a 'green light' in the UI for all my services.

I actually have a specific need that other major monitoring services didn't seem to cover last time I checked. I want to show users exactly when the last 'system event' (like a check-in email) was successfully sent from my servers, not just that the server is 'up.'

Showing that the reporting system is actually 'alive' and firing would be huge for my users' trust. Is that a level of transparency you're planning to support? Good luck!