| T-TreintayCuatro | Heavy Metal | Araba | |
| Taken | Power Metal | Nafarroa | |
| The Blackening | Thrash/Groove Metal | Nafarroa | |
| The Broken Horizon | Metalcore | Nafarroa | |
| The Covenant | Post Metal | Bizkaia | |
| The Flying Scarecrow | Rock/Metal | Bizkaia | |
| The Hellectric Devilz | Heavy Metal | Lapurdi | |
| The Kraven | Groove Metal | Bizkaia | |
| The Name | Metal | Bizkaia | |
| Titan | Heavy Metal | Lapurdi | |
| Toifelthal | Heavy/Hard Rock | Nafarroa | |
| Trannce | Industrial Metal | Gipuzkoa | |
| Trendkill | Thrash/Groove Metal | Bizkaia | |
| Tunikah | Black Metal | Gipuzkoa | |
| Txatar | Thrash Metal | Gipuzkoa | |
| 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 | |
| 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 | |
| X-at | Rock/Metal | Gipuzkoa |