Tricentis Tosca

Tricentis Tosca is an absolute enterprise leviathan. It completely shuns the code-heavy, script-based approach of Selenium. It operates on a massive "Model-Based Testing" architecture. Instead of writing code, a user points Tosca at an application (like a massive SAP ERP interface). Tosca scans the interface and builds a mathematical "Model" of all the buttons and text fields. The QA engineer then builds test cases by dragging and dropping elements of that model. The genius of this approach is maintenance. If the massive SAP software updates globally and changes 500 screens, the QA team doesn't have to rewrite 10,000 lines of code. They simply tell Tosca to "re-scan" the software, updating the central Model. All 10,000 test cases are instantly updated automatically. Because of this specific architecture, Tosca is the absolute dominant player for testing massive, ultra-complex enterprise applications like SAP, Oracle, and Salesforce. A global manufacturing company moving from SAP ECC to SAP S/4HANA will almost exclusively use Tosca to automate the testing of millions of business-critical workflows before flipping the switch on the new system.