| Positiva | Hard Rock | Bizkaia | |
| Potentor | Heavy Metal | Gipuzkoa | |
| Prophetic Scourge | Death Metal | Lapurdi | |
| Quaoar | Progressive Rock/Metal | Bizkaia | |
| RAS | Grindcore/Death | Gipuzkoa | |
| Ready Aim Fire | Hard Rock | Bizkaia | |
| Recreate | Metalcore | Nafarroa | |
| Red Dead | Death Metal | Lapurdi | |
| Reditio | Rock/Metal | Nafarroa | |
| Rezikle | Metal | Gipuzkoa | |
| Rhevent | Heavy Metal | Nafarroa | |
| Rise To Fall | Melodic Death Metal | Bizkaia | |
| Robert Rodrigo Band | Hard Rock | Bizkaia | |
| Rotten Notes | Death/Grindcore | Araba | |
| Sabotaje | Heavy Metal | Bizkaia | |
| Sealed Room | Rock/Metal | Bizkaia | |
| Sen Horx | Rock/Metal | Bizkaia | |
| Sentimen Beltza | Black Metal | Araba | |
| Sepulchral | Death Metal | Bizkaia | |
| Servants Of The Sword | Brutal Death Metal | Gipuzkoa | |
| Sffera | Heavy Metal | Bizkaia | |
| Shallow Waters | Melodic Doom/Death Metal | Gipuzkoa | |
| Shintra | Post-Metal | Bizkaia | |
| Shrapnel Meat | Thrashcore | Bizkaia | |
| Silent Opera | Symphonic Death Metal | Lapurdi | |
| Sinmas | Thrashcore | Bizkaia | |
| Sixmika | Groove Metal | Araba | |
| Sönambula | Doom/Death Metal | Bizkaia | |
| Song Of Anhubis | Rock/Metal | Bizkaia | |
| Sorgerth | Death Metal | Bizkaia |
