Selenium and Cypress are both open-source test automation frameworks, each catering to different needs in the realm of web application testing. Selenium, a long-established tool, supports multiple programming languages and is highly favored for cross-browser testing due to its compatibility with a wide range of browsers and operating systems. It is often used in conjunction with cloud-based platforms like LambdaTest for scalable testing solutions. Cypress, on the other hand, is a newer entrant specifically designed for front-end testing with JavaScript. It offers unique features such as time travel, real-time reloads, and automatic waiting, which streamline the testing process by executing tests directly within the browser. However, it is limited to JavaScript and supports fewer browsers. While Selenium is suited for comprehensive cross-browser testing and integration with various tools, Cypress excels in environments where JavaScript is predominant, and speed and simplicity are prioritized. The choice between the two depends on project requirements, existing skill sets, and specific testing needs.