Parallel.fm is described as 'Listen to Spotify with your friends' and is a Music Streaming Service in the Audio & Music category. There are three alternatives to Parallel.fm for Online / Web-based and iPhone. Most alternatives are Music Streaming , Music Discovery Services and Social Networks. The best alternative is Jukebox.today, which is free. Other great apps like Parallel.fm are noidd.com (Free) and Liyo (Free).
Jukebox is a social media player that lets you create a collaborative music room in seconds. Share songs across limitless people, devices and speakers, whether they're in the same room or halfway across the world.
Liyo is a live streaming app that lets you enjoy music and videos with friends. Play music and content from YouTube, Spotify, and SoundCloud, inviting friends to your own live channels or joining theirs.