Mnemofobia is a heavy and thrash metal band from Casar de Cáceres, Spain, formed in 2014. They forge powerful metal combining heavy metal's classic foundations with thrash's aggressive edge.

Moby Dick is a NWOBHM-inspired heavy metal band from Northwich, England, formed in 2011. They channel the classic British heavy metal tradition.

A heavy and groove metal act from the tiny Finnish municipality of Pyhäntä, Mohare delivers thick, mid-tempo riffing from an improbably rural setting. Active since 2014, the band proves that crushing grooves can emerge from even the most remote corners of the Finnish countryside.

Moira is a heavy/groove metal act from the southwestern Finnish town of Harjavalta, active since 2015. Named after the Greek concept of fate, the band delivers destiny-heavy, rhythmically charged compositions.

Mokoma is a band from Lappeenranta, Finland, formed in 2009, having evolved from hard rock and heavy metal roots into thrash metal. Their stylistic evolution reflects an intensifying creative trajectory from accessible rock to extreme aggression.

Mole is a heavy metal band from Madrid, Spain, formed in 2019. They forge classic heavy metal rooted in powerful riffs and driving rhythms.

Molten Chains are a blackened heavy/thrash metal band based in Vienna, Austria, formed in 2017 by Australian-born guitarist and vocalist Brenton Weir. The band has released three albums — 'In the Antechamber Below' (2019), 'Torment Enshrined' (2020), and 'Orisons of Vengeance' (2022) on Alone Records — and have been covered by Decibel Magazine for their work blurring the lines between heavy, black, and avant-garde metal. Despite the black metal imagery, their sound lands closer to blackened thrash than orthodox black metal.

Molten Slag is a heavy and stoner metal band from London, England, formed in 2025. They channel heavy, riff-driven stoner metal from the UK capital.

Monasthyr is a thrash and heavy metal band from Mieres, Spain, formed in 2016. They combine the aggression of thrash with heavy metal's anthemic power from the Asturias region.