| Arkhos | Groove Metal | Nafarroa | |
| Arvalastra | Death/Doom Metal | Bizkaia | |
| Asgarth | Heavy Metal | Gipuzkoa | |
| Aski Da | Metal/Hardcore | Gipuzkoa | |
| Astigarraga Thrower | Death Metal | Gipuzkoa | |
| Atila Txiguagua Beldurgarria | Rock/Metal | Bizkaia | |
| Atlas Project | Melodic Death Metal/Groove Metal | Nafarroa | |
| Auritz | Metal/Rock | Bizkaia | |
| BackBone | Sludge Metal | Bizkaia | |
| Basati | Metal | Bizkaia | |
| Beneath The Surface | Metal/Hardcore | Gipuzkoa | |
| Beyond His Faith | Metal | Bizkaia | |
| Bicephalous | Black 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 | |
| Bow To The Lions | Metalcore | Nafarroa | |
| Broken Legacy | Metalcore | Gipuzkoa | |
| BudaSam | Hard Rock | Bizkaia | |
| Bullets Of Misery | Deathcore | Bizkaia | |
| Butronian | Black Metal | Bizkaia | |
| Can Of Worms | Thrash Metal | Lapurdi |
