| The Space Octopus | Rock/Metal/Prog | Bizkaia | |
| The Wizards | Hard Rock | Bizkaia | |
| Titan | Heavy/Speed Metal | Lapurdi | |
| Toifelthal | Heavy/Hard Rock | Nafarroa | |
| TOMB | Brutal Death Metal | Bizkaia | |
| Torheit | Death/Groove Metal | Nafarroa Beherea | |
| Tunikah | Black Metal | Gipuzkoa | |
| Txatar | Thrash metal | Gipuzkoa |
|
| Unbound | Heavy Metal | Araba | |
| Urbangrind | Death/Grindcore | Bizkaia | |
| Urlik | Crust/Black Metal/Hardcore | Bizkaia | |
| Usuales | Hard Rock | Gipuzkoa | |
| Vakumm | Groove Metal | Nafarroa | |
| Valkyria | Heavy Metal | Bizkaia | |
| Velka | Black Metal | Gipuzkoa | |
| Vertigo Rising | Alternative Metal/Metalcore | Nafarroa | |
| Vhäldemar | Heavy/Power Metal | Bizkaia | |
| Vice Presidentes | Sludge Metal | Araba | |
| Voltium | Thrash Metal | Bizkaia | |
| War Symphony | Power Metal | Nafarroa | |
| When Evil Comes | Metalcore | Araba | |
| Withredd | Prog/Modern Metal | Bizkaia | |
| Wojtyla | Heavy Metal | Nafarroa | |
| Xtasy | Hard Rock | Nafarroa | |
| ZaKill | Thrashcore/Crossover | Nafarroa | |
| Ztah | Groove Metal | Lapurdi |
