Selenium is an open source tool, which means anybody can use it for free. Any organization can use Selenium to test their website or web application and even independent programmers can learn and practice automation testing using Selenium WebDriver. Top 10 Reasons Why You Should Learn Selenium Open source/ Free tool. No OS/ browser demands. Support for multiple programming languages. Availability of Frameworks. Strong presence in the DevOps lifecycle. Easy integration with other tools. Parallel & distributed testing. No dependency on GUI based systems.