Mansion is a doom metal and rock band from Turku, Finland, formed in 2013. They channel occult doom through ritualistic compositions steeped in dark mysticism.

Many Suffer is a black and doom metal band from Bradford, England, formed in 2020. They fuse black metal's darkness with doom's crushing weight.

Mararah is a gothic, doom, symphonic metal, and depressive black metal band from France, formed in 2025. They blend multiple dark metal traditions into brooding, emotionally devastating compositions.

Marasmo is a stoner and doom metal band from the Community of Madrid, Spain, formed in 2011. They channel heavy, crushing doom through a stoner metal lens of distorted riffs and sluggish grooves.

Formed in Mechelen in 2008 with an explicit mission to revive the early 1990s doom-death sound, Marche Funèbre have since released ten albums and performed over 180 concerts across more than 15 countries. Key releases including Into the Arms of Darkness, Roots of Grief, and the more recent Echoes From Beyond trace the band's growth from underground act to one of Belgium's most prolific doom-death exports.

Mardröm is a black/doom metal and drone project from Stolzenau, Germany, formed in 2024. Their sound occupies the suffocating intersection of black metal's frigid atmosphere, doom's crushing weight, and drone's hypnotic repetition.

Mare Infinitum is a atmospheric doom/death metal band from Moscow, Russia, formed in 2011. They craft crushing doom-death compositions steeped in oppressive heaviness.

Mares of Diomedes is a doom and sludge metal band from Belfast, Northern Ireland, formed in 2015. Named after the man-eating horses of Greek mythology, they deliver crushing doom-sludge.

A stoner and doom metal act from Birmingham, the city that birthed the genre, Margarita Witch Cult channels the Sabbathian tradition with fuzz-drenched riffs and occult themes since 2022. The band carries the weight of Birmingham's doom legacy in every down-tuned chord.