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; RealVideo, a compressed video format; RealPlayer, a media player; RealDownloader, a download manager; Unifi, a Personal Cloud media service; Rinse, a digital music library cleanup tool; and Helix technology for delivering digital media to PCs, mobile phone, and other devices.