Founded in 2005 by Dylan Smith and Aaron Levie, Box is an online file sharing and personal cloud content management service for businesses. Box operates on a freemium business model and provides up to 50GB of free storage for personal accounts. A mobile version of Box is also available for Android, BlackBerry, WebOS, iOS and Windows Phone devices. In 2007, Box announced OpenBox, a service that connects Box with other web-based applications and services, including ThinkFree, Twitter, Zazzle, Autodesk and others.