What are some alternatives?
When comparing UPDOWNtoday and Monitority, you can also consider the following products
WebGazer - Monitor your website's availability with WebGazer, review its performance and get instant notifications when your website goes down. No installation required and free plan available.
updown.io - updown.io is a HTTP(S)/TCP/ICMP monitoring service which checks periodically the URL you want and reports back any anomaly.
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Oh Dear! - Website monitoring, without the hassle
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
UptimeRobot - Free Website Uptime Monitoring