- IRA (PL) (Hard Rock-Poland)
- Ira (ITA) (Death Metal-Italy)
- Ira (MEX) (Power Metal-Mexico) - Other name : ex-Coprophagia
- Ira (POR) (Heavy Metal-Portugal)
- Ira Deum (Thrash Metal-Bulgaria)
- Ira Diaboli (Symphonic Black-Greece)
- Ira Divina (Unblack-Brazil)
- Ira Nascente (Metal-France)
- Ira Projeckts (Brutal Death-Chile)
- Ira Regia (Power Metal-Spain)
- Ira Tenax (Black Death-Germany)
- Irae (POR) (Black Metal-Portugal)
- Aventh (Melodic Death-Brazil) - Other name : ex-Irae
- Irae (FRA-1) (Melodic Death-France)
- Irae (FRA-2) (Hardcore-France)
- Irae Satanail (Black Metal-Colombia)
- Iraka (Technical Thrash-Spain)
- Numidas (Hard Rock-Algeria) - Other name : ex-Iran
- Iranach (Death Metal-USA)
- Irascibilis (Atmospheric Black-USA)
- Irasonoma (Progressive Death-USA)
- Irate Architect (Death Grind-Germany)
- IRATE (USA-1) (Nu Metal-USA) - Other name : Infinite Rebellion Against The Establishment
- Irate (USA-2) (Hardcore-USA)
- Irathus (Black Metal-Philippines)
- Irato (Heavy Metal-Argentina)
- Iratus Dominus (Black Death-Belarus)
- ID:Vision (Cyber Metal-Belarus) - Other name : ex-Desecrated, ex-Iratus Dominus
- Iraultza (Thrash Metal-Spain)
- Iraven (Heavy Death-France)
- Iraventus (Death Doom-Russia)
- Iravu (Atmospheric Black-Malaysia)