| RAS | Grindcore/Death | Gipuzkoa | |
| Ready Aim Fire | Hard Rock | Bizkaia | |
| Red Dead | Death Metal | Lapurdi | |
| Reditio | Rock/Metal | Nafarroa | |
| Rise To Fall | Melodic Death Metal | Bizkaia | |
| Robert Rodrigo Band | Hard Rock | Bizkaia | |
| Rotten Notes | Death/Grindcore | Araba | |
| Sabotaje | Heavy Metal | Bizkaia | |
| Saddict | Death Metal | Lapurdi | |
| Samarithan | Doom Metal | Bizkaia | |
| Sasikurutza | Doom Metal | Bizkaia | |
| Sealed Room | Rock/Metal | Bizkaia | |
| Sentimen Beltza | Black Metal | Araba | |
| Sepulchral | Death Metal | Bizkaia | |
| Sffera | Heavy Metal | Bizkaia | |
| Shallow Waters | Post Black Metal | Gipuzkoa | |
| Shintra | Post-Metal | Bizkaia | |
| Sinmas | Thrashcore | Bizkaia | |
| Sixmika | Groove Metal | Araba | |
| Skin Tortured | Death Metal | Bizkaia | |
| SOA | Metal | Gipuzkoa | |
| Sönambula | Doom/Death Metal | Bizkaia | |
| Song Of Anhubis | Rock/Metal | Bizkaia | |
| Sons of Decay | Thrash/Black Metal | Gipuzkoa | |
| Sorgerth | Death Metal | Bizkaia | |
| Soulitude | Heavy/Power Metal | Bizkaia | |
| Soziedad Alkoholika | Crossover | Araba | |
| Spirikom | Death Metal | Nafarroa | |
| Strappado | Brutal Death Metal | Bizkaia | |
| Su Ta Gar | Heavy Metal | Gipuzkoa |
