Jason Huggins invented the Selenium automation tool in 2004 while working at ThoughtWorks to avoid manually testing a web application across different browsers. He developed the initial Javascript library that became known as Selenium Core. Although he left ThoughtWorks in 2007 to work on Selenium at Google, he went on to co-found Sauce Labs in 2008 to offer automated testing as a service before leaving to focus on his second startup Tapster, which develops robots to automate mobile application testing.