TestGrid is the AI operating system that runs quality engineering. It pairs agentic test creation and maintenance with the infrastructure those tests execute on, including real mobile devices and browsers across dedicated cloud, on-premises, and hybrid deployments. CoTester, TestGrid's AI testing agent, turns requirements and user stories into executable tests and uses self-healing capabilities to help keep automation stable as application interfaces change. Existing Selenium, Appium, Cypress, and Playwright suites run on TestGrid without rewrites. TestGrid's testing coverage spans web, mobile, APIs, performance, visual, and audio testing, along with packaged enterprise applications including Salesforce, SAP, ServiceNow, and Microsoft Dynamics. The website, https://www.testgrid.io/, offers additional details about their features, services, and pricing options.