Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
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.
Atera - The only IT management platform powered by Action AI™
UptimeRobot - Free Website Uptime Monitoring
NinjaOne - NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.
Pingbreak - Pingbreak is an original and free monitoring service.