As a charity running large-scale, online, match-funding campaigns, getting immediate alerts to any issues with Salesforce and AWS availability is vitally important. Uptime Robot provides us with a service that gives us timely alerts and enough information to quickly rectify problems. The fact that it integrates with Slack is an added bonus. We have used UptimeRobot for a number of years now and found it easy to use, easy to implement and we've always had great response times from customer services.

Very good UI and well designed The Free plan covers most of the things I need for a little task

As a web master I have used Uptime Robot for over 5 years. Setting up monitors is straight forward. It has the features I need and a reliable alert system (paid). I haven't had any issues and the site UI/UX is excellent. Nice work!