Int4 IFTT is a tool which was designed to be used to test SAP middleware (SAP PO, SAP CPI, SAP AIF, IDOC, proxies, also for S/4HANA conversions, etc.) where it can be fully scriptless (no need to create any test data as we use existing messages or backend documents posted on the SAP backend systems). It can be used in all sorts of migrations/patching/service pack upgrades/rollouts where it’s not possible to create test cases manually as with other testing software. On the other hand, Int4 IFTT can be called via API from any Test tool like HP/Microfocus ALM, Test Suite, etc. for test result analytics and this kind of integration we do in all of our projects as integration testing is a good way to start the testing journey but the journey needs to be continued with other types of testing too. With Int4 IFTT we also test different phases of the projects (more the Unit Testing and Integration Testing and less for UAT). From the functional perspective, Int4 IFTT can also virtualize external systems (legacy, B2B). So to conclude, Int4 IFTT is a more detailed engine for running the Test Suite if your company heavily relies on integration with other systems. Int4 IFTT is an SAP certified add-on installed on Solman (just like SAP Test Suite).