Pingdom's website monitoring platform enables you to monitor your website's availability and performance with features like uptime monitoring, real user monitoring, synthetic interaction testing, page speed monitoring, alerting, and root cause analysis. It also offers a popular free tool, the Pingdom Website Speed Test, which can be used to test your website or a competitor's website for load time, page size, and performance in general. Pingdom was acquired by SolarWinds in 2014.