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.
Skuuudle - Discover, match and monitor your eCommerce competitors.
UptimeRobot - Free Website Uptime Monitoring
Klue - Klue is competitive intelligence for enterprise sales. We help sales, and the teams who enable them, leverage CI to win more deals.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Crayon - Crayon market and competitive intelligence tools provide insights and inspiration for marketing, sales, and product management.