Is Selenium free to use?
Selenium is a free, open source tool for software testing. The idea behind Selenium is to write tests in the same language that everyday developers use to write their web applications. Tests can be written in a number of different programming languages, and there are libraries available for most popular languages such as Java, Python, Ruby and PHP. One of the best things about Selenium is that it’s cross-platform. It’s possible to write and run tests on Windows, Mac or Linux platforms with the same set of tools.