Cloudkick is described as 'leading infrastructure management tool for the web-based IT era, built by system administrators to help meet all the demands and needs of managing infrastructure'. There are more than 25 alternatives to Cloudkick, not only websites but also apps for a variety of platforms, including SaaS, Linux, Mac and Windows. The best alternative is Datadog. It's not free, so if you're looking for a free alternative, you could try Freshping or New Relic. Other great sites and apps similar to Cloudkick are Pingdom (Paid), Pingbreak (Free), Nodeping (Paid) and Curler by Amixr.IO (Free).
Datadog is a monitoring service for IT, Dev & Ops teams who write and run applications at scale, and want to turn the massive amounts of data produced by their apps, tools and services into a unified view of IT infrastructure. 120+ Integrations!.
Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your website as experienced by visitors.
Pinpoint and solve performance issues in your Ruby, Java, .NET, PHP and Python apps with real user, application and server monitoring. Free accounts can ping a website every 1 minute, from multiple locations around the globe, and send email alerts.
Pingbreak is an original and free monitoring service. Get notified through Twitter if your website is down. Pingbreak checks all of your websites each minute and alert you instantly by Direct Message (DM).
Monitor uptime,response timeandapdex indexes of your website or api for free and receive instant updates through e-mail or Slack with real time announcements. Don't leave your customers in the dark during downtime & outages of your website.