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.
Zintlr - Best B2B Database for Sales Intelligence | Prospects for Cold Emails | Design go-to-market strategy | Accurate Lead Lists | 5x meetings and demos | Increased Revenue Generation
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
LeadBlitz - The Quickest Lead-Automation Tool On The Web.
Better Uptime - We call you when your website goes down
zScout by Zintlr - Prospect your next customer