| Furyo | Industrial Metal | Lapurdi | |
| Gabezia | Metal | Gipuzkoa | |
| Gojira | Groove Metal | Lapurdi | |
| Gorrotun Hazixak | Thrashcore | Bizkaia | |
| Gory Delivery | Brutal Death Metal | Bizkaia | |
| Governors | Rock/Metal | Gipuzkoa | |
| Grave Dust | Thrash/Death Metal | Nafarroa | |
| Grendel | Power Metal | Araba | |
| Harsh | Brutal Death Metal | Bizkaia | |
| Heil Hipster | Rap Metal | Nafarroa | |
| Helde | Black Metal | Gipuzkoa | |
| Helldamm | Thrash Metal | Gipuzkoa | |
| Hellydays | Hard Rock | Bizkaia | |
| Hellydays | Hard Rock | Bizkaia | |
| Hex | Death Metal | Bizkaia | |
| Highlights | Hard Rock | Bizkaia | |
| Hilkar | Thrashcore | Gipuzkoa | |
| Hilotz | Thrash/Death Metal | Gipuzkoa | |
| Histolysis | Death Metal | Gipuzkoa | |
| Holly Brandy | Hard Rock | Bizkaia | |
| Holy Txala | Hardcore/Metal | Bizkaia | |
| Hopelessness | Melodic Death Metal | Gipuzkoa | |
| Horzdun | Sludge Metal | Gipuzkoa | |
| Hotzikara | Thrashcore | Gipuzkoa | |
| HRS | Hard Rock | Araba | |
| Hurmurao | Metal/Hardcore | Lapurdi | |
| Hybrid Moon | Death Metal | Gipuzkoa | |
| Hyronika | Heavy Rock | Gipuzkoa | |
| Ikarass | Post/Doom Metal | Araba | |
| Ikus | Metal | Nafarroa Beherea |
