- Matricyde (Thrash Metal-United-Kingdom)
- Mantric (Progressive Metal-Norway)
- Matarife (Sludge Doom-Spain)
- Mathilde (Black Death-Switzerland)
- Maule (Heavy Metal-Canada)
- Mastercastle (Power Metal-Italy)
- Masterful (Melodic Power-France)
- Maestrick (Progressive Power-Brazil)
- Martriden (Black Death-USA)
- Marseille (NWOBHM-United-Kingdom)