Publishers – I
- I.M.P.
- i2i Publishing
- Ian Harrold Music
- Ian Robbins
- Ibermúsica
- Iconic Concepts
- ID Music
- Idea Graphics
- Idea Música
- Idea Press
- IFO music & media for organ
- Il Castello
- Il Saggiatore
- IMC
- IMP Archive
- Independent Publishers Group
- Independently Published
- Indiana University Press
- Indy Pub
- InEllis
- Ink to Music
- Integrity Music
- Inter Music Network
- Interlude
- International Digital Book Publishing
- International Music Diffusion
- International Opus
- Intersong Basart
- Intra's Edizioni Musicali
- Intrada Muziekuitgave
- Intuition
- Iris Musikverlag
- Irmãos Vitale
- Iron Horse Entertainment
- Island Music
- Israel Brass Woodwind
- Israel Music Institut
- Isuku Verlag
- Itchy Fingers Publications
- iUniverse
