| Txerri Ugerrak | Rap Metal/Hardcore | Bizkaia | |
| Unbound | Heavy Metal | Araba | |
| Urbangrind | Death/Grindcore | Bizkaia | |
| Urkara | Melodic Death/Black Metal | Nafarroa | |
| Urlik | Crust/Black Metal/Hardcore | Bizkaia | |
| Usuales | Hard Rock | Gipuzkoa | |
| Vakumm | Groove Metal | Nafarroa | |
| Valkyria | Heavy Metal | Bizkaia | |
| Vertigo Rising | Alt Metal/Metalcore | Nafarroa | |
| Vhäldemar | Heavy/Power Metal | Bizkaia | |
| Viewer | Hardcore/Metal | Bizkaia | |
| War Symphony | Power Metal | Nafarroa | |
| When Evil Comes | Metalcore | Araba | |
| Withredd | Prog/Alt Metal | Bizkaia | |
| Wojtyla | Heavy Metal | Nafarroa | |
| Xilum | Alt Metal | Nafarroa | |
| Xtasy | Hard Rock | Nafarroa | |
| Ztah | Groove Metal | Lapurdi | |
| Zuldar | Melodic Death Metal | Bizkaia | |
| Zurbeltz | Groove Metal | Gipuzkoa |