Virtuoso QA conducts testing across a variety of platforms, including Chrome, Edge, Firefox, and Safari, on operating systems like Windows, macOS, Linux, as well as mobile platforms such as iOS and Android. Utilizing a robust cloud-based infrastructure, it offers access to approximately 2,000 combinations of operating systems, browsers, and devices. Additionally, teams have the flexibility to integrate their own testing grids. Device settings are configured once and can be executed simultaneously, either on a predetermined schedule or through CI/CD pipelines. Support is provided for both responsive and mobile web applications, utilizing both physical and emulated devices. Touchstone, the intelligent layer of Virtuoso, employs AI agents to identify and fix issues during testing. In instances of test failures on specific devices or browsers, Touchstone categorizes the error and suggests a solution, which must be validated by a human before any updates are made. Each modification is tracked with versioning capabilities, ensuring that changes can be reversed if necessary, while the execution process remains consistent, guaranteeing reliable results across multiple test runs.