Uptime.com has a clean and intuitive web UI, and a well-documented API for programmatic access. The Product and Support teams have been attentive and responsive to our needs, and actively work to improve the service.
Uptime.com's service offering is competitive with other top providers, and very simple to set up. Maintenance of probe servers is communicated well in advance, so there have been no surprises in terms of uptime of the monitoring service itself. Review collected by and hosted on G2.com.