RealNetworks, Inc. is a provider of Internet streaming media delivery software and services based in Seattle, Washington, United States. The company is the creator of RealAudio, a compressed audio format; RealDownloader, a download manager; RealDVD a DVD player; RealPlayer, a media player; and RealVideo, a compressed video format; as well as Helix technology for delivering digital media to PCs, mobile phone, and other devices; Rinse, a digital music library cleanup tool; and Unifi, a personal cloud media service. The company also manages subscription-based online entertainment services including GameHouse RealNetworks’ software as a service group and SuperPass; it also provides mobile entertainment and messaging services to mobile carriers.