Sauce Labs has secured $15 million in Series D expansion funding to expand its geographic and infrastructure capabilities. The company is experiencing significant growth with over 200 million total tests run on its platform, and 145 percent revenue growth in 2014. The new funding will be used to extend both the company's web application testing offering and mobile testing platform, as well as provide continued backing of Appium, a premier open source mobile automation tool. Additionally, the funding will support infrastructure expansion, development team growth, and international operations. According to Sauce Labs CEO Jim Cerna, automated testing is critical to modern software development, and the new funding will help meet the growing demand for scalable and reliable testing for web and mobile applications. The company's secure and reliable testing infrastructure enables users to run tests written with Selenium and Appium, eliminating time and expense of maintaining a test grid.