Warden Online - Warden.Online › Website Uptime & Speed Monitoring
UptimeRobot - Free Website Uptime Monitoring
WebPagetest - Run a free website speed test from multiple locations around the globe using real browsers...
Uptime.com - Everything you require for unified availability monitoring Simple & intuitive industry leading Enterprise-grade features delivered at a fair price, that are continuously improving.
Uptrends - Uptrends is a website and mobile app that allows you to monitor your website. You can use it to both monitor the security and performance of your website as well as the activity on your site. Read more about Uptrends.
NewRelic - New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.