We are also using Accedian Skylight. We have both solutions in the organization. 

We also have SolarWinds and Splunk. 

Previously, we used Nagios, PRTG, and SolarWinds. While they primarily concentrate on monitoring network devices, ThousandEyes places its focus on monitoring services and providers hosted on those devices.

Previously, I have used other products. It is my company that decided to choose ThousandEyes.

We chose ThousandEyes because of the internet and WAN ability. The Cisco FSO, Full-Stack Observability, is also good. ThousandEyes covers the end-user monitoring site, AppDynamics covers the APM side, and Intersight covers the whole infrastructure and the cloud.

I've previously used PRTG and Zabbix, among others. They are a little bit different because this solution is really focused on network quality.