TestComplete

TestComplete, developed by the QA giant SmartBear, is an incredibly powerful, commercial automation tool that is famous for its massive breadth. While tools like Cypress focus exclusively on testing web browsers, TestComplete can test legacy Windows desktop applications (like a 20-year-old accounting program), modern iOS mobile apps, and complex web applications all from the same interface. It is heavily favored by enterprise companies with massive legacy IT infrastructure. If a bank needs to automate a test that involves an employee logging into a web portal, generating an Excel file, and then uploading that file into an ancient Windows desktop application, TestComplete can automate that entire cross-platform workflow, something web-only tools physically cannot do. It features a massive, AI-powered "Object Recognition" engine. Instead of relying purely on fragile HTML code tags (which break constantly), TestComplete uses OCR (Optical Character Recognition) and AI vision. If a developer moves a "Submit" button from the left side of the screen to the right, TestComplete physically "sees" the button based on how it looks and clicks it anyway, drastically reducing test maintenance.