| Sweet Rage | AltRock/Metal | Bizkaia | |
| Sykario | Rap Metal | Nafarroa | |
| 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 Hammer Killers | Hard Rock | Bizkaia | |
| The Hellectric Devilz | Heavy Metal | Lapurdi | |
| The Kraven | Groove Metal | Bizkaia | |
| The Name | Metal | Bizkaia | |
| The Wizards | Hard Rock | Bizkaia | |
| Titan | Heavy Metal | Lapurdi | |
| Tizona | Heavy Metal | Bizkaia | |
| Toifelthal | Heavy/Hard Rock | Nafarroa | |
| TOMB | Brutal Death Metal | Bizkaia | |
| Trannce | Industrial Metal | Gipuzkoa | |
| Trendkill | Groove/Thrash metal | Bizkaia | |
| Tunikah | Black Metal | Gipuzkoa | |
| Txatar | Thrash metal | Gipuzkoa | |
| Txerri Ugerrak | Nu 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 | Alternative Metal/Metalcore | Nafarroa |