- Groove Tubes
- Grover
- Hahn
- Hammond
- Hanlong
- Hannabach
- Hardcase
- Haussel
- Hayman
- Heet Sound
- Helin
- Helukabel
- Herdim
- Heriba
- Hernandez
- Highly
- Highwood
- Hipshot
- Hirschmann
- Hitachi
- Hitpoint
- Hongh
- Hoolahan
- Hosco
- Hosco Japan
- Hotone
- Hovland
- Hünersdorff
- Huntington
- HW
