Is anyone using Tosca for Non Functional Testing?

I'm aware that some are using this to 'flood' an application with load and to assess performance. I have worked with clients that have used Tosca to benchmark a transaction when re-platforming. It isn't best practice for assessing software performance. Not the use of Tosca just the general practice of testing software performance in this way. I do have a number of clients that use Tosca for checking that a suite of applications are available from a user perspective (for example - as a system health check after a maintenance window). This is quite common, successful and a good use case for a test automation tool that drives the UI.

Tosca is used for Automation testing in T-Mobile account in AppsNA BU. Kindly connect with them for more details.

To date, I have only been utilising Tosca for functional testing. My experience is limited to one client, one product.

I am not aware of anyone using TOSCA for Non-functional testing. Although the question is not clear as there are multiple non-functional testing. Is the question regarding the performance test or HA-DR test or stress test?

From a reliability standpoint, we have Tosca setup with DEX to check some of our production apps to ensure they are up and running.  

We did this because we were noticing that some of our critical Prod apps were going down for some reason.  

So we have Tosca running a quick test to ensure the app is running and if not send out an email notification.These checks run every 15 minutes.

Good point! I was referring to Negative, Failover, Negative and Shakedown testing.