Selenium is a portable software-testing framework for web applications. Selenium provides a record/playback tool for authoring tests without the need to learn a test scripting language (Selenium IDE). Developed by SeleniumHQ
License: Open Source
iMacros is a user-friendly tool ideal for beginners and simple web automation tasks, focusing on ease of use with a record-and-playback feature. In contrast, Selenium offers a powerful and flexible framework suited for complex automation needs, requiring programming knowledge and providing extensive integration capabilities.