What are some alternatives?
When comparing WhoSampled and AudioTag, you can also consider the following products
Shazam - Shazam is a mobile app that recognizes music and TV around you.
SoundHound - SoundHound - the most immersive music search, discovery and play experience on mobile.
Musixmatch - - World’s Largest Lyrics catalog and official
MusicID - Hold MusicID up to music and it'll tell you the name of the song in seconds.
ACRCloud - Automatic Content Recognition (ACR) cloud services for Audio Recognition ( identify music, ads ), Broadcast Monitoring, Second Screen, Copyright Protection.
WatZatSong - WatZatSong is a community of music enthusiasts who can identify most songs and tracks.