TONO collects and distributes royalties to composers, lyricists and music publishers for public performances and broadcast works. Gramo does the same for recorded music, but on behalf of the performers and record companies. In principle, these are different professional groups, whose rights are safeguarded by different copyright law provisions. If you are a performer who also writes your own music, it is natural that you would be a member of both organisations.
Many of TONO’s customers will also be Gramo’s customers.