Smule

Smule is an American mobile app developer founded in 2008 by Jeff Smith and Ge Wang, originally headquartered in San Francisco and now based in Salt Lake City, Utah. The company specializes in developing social music-making and collaboration applications for iOS, Android, and Web. Its flagship product, the Smule app (formerly Sing! Karaoke), allows over 125 million users worldwide to sing songs alone or with friends, record performances, and share them with a global community. The platform features an extensive catalog of songs across genres, enabling real-time duets and group performances with users around the world. Smule was a pioneer in music interaction technology — the name is a shortened version of 'Sonic Mule,' a reference to a character in Isaac Asimov's Foundation Trilogy. The company operates on a freemium subscription model with a VIP membership offering unlimited access to the songbook.