Synthetic monitoring has been around since websites first came to the internet as a simple way to ensure that sites were available to all users at all times. Over the years these tools have matured and developed into complex systems with burgeoning businesses around them.
There are several major players in the synthetic monitoring space including Pingdom, Dynatrace UEM, Alertsite. In addition, many monitoring tools have expanded to the synthetic monitoring space.
Despite this, there is still no Open Source application for synthetic monitoring that offers a fully robust feature set. WebPagetest is an open source project that is primarily being developed and supported by Google as part of our efforts to make the web faster. WebPagetest provides a great Open Source tool for basic performance testing of a site but has not been developed to enable ongoing monitoring an alerting.
xSum fills this gap in the monitoring tools landscape an offer a full featured Open Source synthetic monitoring tool.