I have paid for both SoundHound and Shazam Encore. SoundHound has identified almost every track I have ever submitted... and very quickly; Shazam has identified very few of the same tracks... and takes ages to do it, usually just giving up. SoundHound is an invaluable resource. Most of my submissions have been of House music. Edit 2022. Doesn't identify much anymore; Shazam is way ahead. SoundHound Infinity now often fails to identify tracks without acknowledgement or explanation.