upTom is described as 'Checks your websites every minute or larger intervals according to settings. If the website does not work it alerts you by email. Easy setup – just a simple signup form and then enter the name and URL of your website, then your website will be monitored' and is a Uptime Monitor in the Network & Admin category. There are more than 10 alternatives to upTom, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and Chrome OS. Most alternatives are Uptime and Website Monitors. The best alternative is UptimeRobot, which is free. Other great sites and apps similar to upTom are Pingdom (Paid), Freshping (Free), StatusCake (Freemium) and NIXStats (Freemium).
Dashboard with 50 Monitors, Checked Every 5 Minutes, Totally Free. Monitor HTTP(S), Ping, Port and check Keywords. Get alerted via e-mail, SMS, Twitter, web-hooks or push. View uptime, downtime and response times.
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.
StatusCake.com is a free website monitoring tool which allows users to track up to 10 websites and get alerted when their site is down or is having trouble. Downtime root cause analysis is included in the free plan to help users diagnose and fix issues.
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.