| BackBone | Sludge Metal | Bizkaia | |
| Balarrasa | Hard Rock | Bizkaia | |
| Basati | Metal | Bizkaia | |
| Beneath The Surface | Metal/Hardcore | Gipuzkoa | |
| Beyond His Faith | Metal | Bizkaia | |
| Bide Bakarra | Rap Metal | Nafarroa | |
| Biersbreaker | Viking Metal | Gipuzkoa | |
| Black Cat | Heavy Rock | Gipuzkoa | |
| Black Fire | Metalcore | Araba | |
| Black Ocean Witness | Metalcore | Bizkaia | |
| BlackBeltz | Heavy Metal | Nafarroa | |
| Blackhearth | Metal | Bizkaia | |
| Blast Wave | Power Metal | Gipuzkoa | |
| Bleed | Groove Metal | Bizkaia | |
| Bloody Brotherhood | Death Metal | Gipuzkoa | |
| Bourbon Kings | Nu Metal | Nafarroa | |
| Broken Legacy | Metalcore | Gipuzkoa | |
| Brumadensa | Hardcore/Metal | Gipuzkoa | |
| BudaSam | Hard Rock | Bizkaia | |
| Bullets Of Misery | Deathcore | Bizkaia | |
| Burning Preacher | Death/Thrash Metal | Gipuzkoa | |
| Butronian | Black Metal | Bizkaia | |
| Cäctus | Hard Rock | Bizkaia | |
| Can Of Worms | Thrash Metal | Lapurdi | |
| Carnivorous Voracity | Brutal Death Metal | Bizkaia | |
| Cerebral Effusion | Brutal Death Metal | Bizkaia | |
| Childrain | Groove Metal | Araba | |
| Chotakabra | Hardcore/Metal | Nafarroa | |
| Cobra | Rock/Metal | Bizkaia | |
| Conflict Noise | Death Metal | Bizkaia |
