Free and very reliable-it just works quietly in the background.

I like UptimeRobot because it's easy to set up, just two clicks and a line, and I'm ready to go. The clarity of their reports is great, and I appreciate the communication via email with the necessary details. There's no invasive retention behavior. It's also free to start with no need for upfront payments. I'm impressed by the easy-to-use UI, which contrasts with my experience using other tools like Datadog, which was harder to configure. I also find the integrations they offer promising, and I'm planning to use it in another project soon. Overall, it’s been essential for me as a solo developer to track my projects and identify specific instances when my server goes down.

I currently use the free plan for two projects. It is simple and convenient, and it has already helped me detect local availability issues affecting visitors from Australia.