Mathan are an epic doom metal band from Vienna, Austria, playing in the traditional doom mold with a focus on slow, heavy riffing and epic song structures. The band has been a fixture of the Viennese doom scene, performing at the Austrian Doom Metal Festival 'Doom over Vienna' alongside other regional and international acts. They remain unsigned and independent, releasing music through their Bandcamp page.

Mathians is a sludge/doom metal band from Novara, Italy, formed in 2020. They channel crushing sludge-doom through abrasive riffs and oppressive weight.

Mathusalem is a band from Paris, France, formed in 2022, having evolved from stoner and doom metal into synthwave. Their stylistic transformation reflects an adventurous creative spirit unbound by genre conventions.

Matote is a stoner, doom, and post-metal band from Badalona, Spain, formed in 2018. They merge stoner metal's fuzzy heaviness with doom's crushing weight and post-metal's atmospheric dynamics.

Matraque is a sludge, death, and doom metal band from Minsk, Belarus, formed in 2013 that grinds through low-tuned, punishing heaviness. Their approach layers crushing sludge grooves with death-doom weight, carving out a suffocating sonic space within the Belarusian underground.

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Maunah is a doom and post-metal band from Denmark, formed in 2025. They blend the crushing weight of doom with post-metal's atmospheric expansiveness and dynamic range.

Mausolée is a heavy and doom metal band from Paris, France, formed in 2024. Their French name meaning "mausoleum" captures the sepulchral weight of their heavy doom compositions.

Mauvaise Foi is a sludge/doom metal band from Paris, France, formed in 2017. They channel crushing sludge-doom through abrasive riffs and oppressive weight.