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?

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