I've been looking for a pingdom replacement for the very same reasons GP mentioned. Webmon does look interesting, even though it does appear a bit more expensive. It seems penny-pinching if you consider the cost of downtime, but despite all my complaints about pingdom, it still works and does its job. So I'd need a compelling reason to switch and it's always easy to convince upstream when the price is cheaper or you get something better.
Just a quick question: what's a 'target'? is it the equivalent of a pingdom 'check'? or is this an endpoint IP that we can run several checks over?
Some feedback after a quick glance on the homepage - it's nice and seems to provide the most important info, but I'd appreciate some more in-depth info on some areas (to answer my question about targets and possibly other questions about other stuff: what's a user, what's a dashboard etc)
It's not as simple as you'd think. Monitoring 1 website is easy, monitoring 1M websites and gathering results in realtime from stations around the globe to make a proper decision is a different thing. Significant bandwidth, and CPU are needed to achieve this, not to mention relying on third party services like twilio and sendgrid to notify customers and that cost money too.