Shared Spotify
Find the common songs you have between friends
Competitors & alternatives
Spotipare
Find songs in common with other Spotify users
Merge Music
Merge music with friends to find out what music you share
Spotify Blend
Instantly create a shared playlist between you and a friend
we:fm for web
Listen to the same music with friends, at the same time.
Similar Songs Finder
Find similar songs you'll love