DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
Notifuse - A 1-to-many notification API that's simple to use
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
One Call Now - One Call Now's message notification delivers automated phone calls, SMS text messages and emails within moments to any group.
Forcepoint Web Security Suite - Internet Security