Considering the surge in online usage and high number of lead conversions happening directly via your website. It's critical that you ensure you site is up and running 24x7. In today's world any downtime would mean you losing out on potential customer and big bucks. Here are some sites which helps monitor the sites and send reports when site comes down allowing you to take prompt action.
- Feature Rich but pricey
- Economical and should cater to most needs
Also if you want to review more sites that does this you can go through this article