Upptime is described as 'GitHub-powered open-source uptime monitor and status page' and is a Uptime Monitor in the Network & Admin category. There are more than 100 alternatives to Upptime for a variety of platforms, including Online / Web-based, SaaS, Windows, Linux and Mac. The best alternative is UptimeRobot, which is free. Other great apps like Upptime are Better Uptime (Freemium), Pingdom (Paid), Freshping (Free) and PHP Server Monitor (Free, Open Source).
StablePing is a fully managed uptime monitoring service for just $3.95/month. Whenever your website goes down, their system will alert you within seconds via email or SMS (and they'll work with you to get it back online).
WebGazer is a website and cron monitoring service. We check if your website and REST APIs are up, and notify you if anything goes wrong. You could also send periodic HTTP requests at the end of cron jobs or scheduled tasks to monitor.
Peace of mind that your website is up and running 60/24/7/365. If you don't hear from us, everything is fine, if you do, then you can get any issues resolved ASAP to avoid lost business and maintain a professional image.
Monitive is an uptime monitoring service, where users sign up and input their website address, which we check every minute, from a random location around the world, and instantly notify them when their site is down.