Publishers – I
- I.M.P.
- i2i Publishing
- Ian Harrold Music
- Ibermúsica
- IC Music
- ID Music
- IFO music & media for organ
- IkuMa Publications
- IKURO Edition
- Il Castello
- Il Saggiatore
- IMC
- IMP Archive
- Impro Circle
- Independently Published
- Indiana University Press
- InEllis
- Ink to Music
- Integrity Music
- Inter Music Network
- Interlude
- International Music Diffusion
- International Opus
- Intersong Basart
- Intrada Muziekuitgave
- Intuition
- Iris Musikverlag
- Irmãos Vitale
- Iron Horse Entertainment
- Island Music
- Israel Brass Woodwind
- Israel Music Institut
- Isuku Verlag
- Itchy Fingers Publications
