Super minimal, simple and inexpensive 24/7 uptime monitoring service.
This service is meant for small and medium websites, which can't afford bigger enterprise-size solutions. You can check out a demo here.
We have already checked more than ~0 urls so far. And we have notified our customers ~0 times their url was down, so that they could take immediate action.
Our own uptime in the last 30 days is: 100%