Why another uptime monitoring service ? There are about 20-30 existing services [1] with a wide variety of features. I agree you've got a great interface and you'll get there feature-wise too. But are there any significant technically sound reasons to switch to your service ?
P.S. My question sounds blunt but I don't mean to belittle your effort.
P.P.S. Here's a list of services that do performance / uptime monitoring in various forms. Some might be incorrect / irrelevant, but just to convey an idea of the crowded space :
[1] pingdom , site24x7, statuscake, statuspage.io, status.io , runscope, opsgenie , newrelic , datadog, Librato, Scout , Skylight , Server Density , Stackify, OpsDash , Boundary, Netuitive, Keymetrics, Appsignal, Appdynamics, copperegg , stackdriver, xmatters, uptimerobot, AWS route53 health check , nagios, t1mr.com, Visualping, diff.io, Obvious.io, Stashboard, Cachet, updown.io, Pingometer , stillalive, alertbot, vigil, AWS Cloudwatch, Cloudability, StatusGator, CloudCheckr,