Pinger Man monitors Websites, Ports, Domains & SSL Certificates. Downtime notification is sent via SMS, Email, Slack & Twitter. It supports maintenance windows, re-usable contacts, globally distributed monitoring, weekly reports & status pages.
Pinger Man's answer
Any company with a public website.
Pinger Man's answer
Pinger Man is the most affordable uptime monitoring solution out there.
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.
Is It Down Right Now? - Network & Admin
UptimeRobot - Free Website Uptime Monitoring
Is it up? - A simple tool to check if a website or ip address is up or down.
UpTime.onl - Simple website uptime monitoring tool
Is it Down? - Is it down can check if a website is down or is it just your PC that can not access it.