The Chord Genome Project has 3 membership levels – the first 2 of which are 100% free.
This allows you to ease into the platform and try it out.
If you enjoy your experience, consider upgrading to a Gold membership. You'll see anywhere from 10X to 100X as many songs for every search. Gold membership also comes with a couple of pretty cool features.
Use the chart below to compare the different membership levels. All the features are "clickable."