Malsten is a doom metal act from Malmö, active since 2019. The band delivers crushing, glacially paced doom from Sweden's third-largest city.

Malämmar is an atmospheric sludge, doom, and post-metal trio from Barcelona, Spain, formed in 2016. Their releases including the Vendetta LP and performances at dunk!festival deliver crushing atmospheric heaviness that defies easy categorization.

Mammoth Storm formed in Säffle, Sweden at the end of 2012 for the express purpose of playing heavy, riff-driven doom, drawing on stoner metal and traditional doom conventions without affectation. The band released their debut full-length Fornjot in 2015 on Napalm Records, followed by Alruna (2019) on Argonauta Records, each featuring lengthy, slow-burning compositions built around massive guitar tones and atmospheric organ. Their straightforward dedication to the heaviness of the riff places them in line with Swedish doom tradition alongside acts like Reverend Bizarre and Witchcraft.

Manali is a cosmic doom band from Kolding, Denmark, featuring guitar, drums, bass, and synth/vocals. Their catalog consists of rehearsal tape volumes that capture the raw, unpolished essence of their spacey, heavy sound, emphasizing live-session intensity over studio polish.

Mang Ont is a stoner, sludge, and doom metal band from Tartu, Estonia, formed in 2012, blending heavy, slow riffs with psychedelic drone and noise. Their Estonian-language releases including Külmavärinad and Sügavkülmunud tuum channel crushing sonic weight through modular synth, bass, and guitar.

Mangled Dreams is a Voss-based act that evolved from doom metal to thrash metal and crossover, active since 2022. The band channels the dramatic Norwegian fjord landscape into aggressive, shape-shifting compositions.

Manhir is a drone and doom metal band from Alton, England, formed in 2013. They craft crushing drone-doom compositions built on sustained heaviness and repetition.

Maniard is a stoner and doom metal act from Bordeaux, channeling the city's famed hedonistic culture into heavy, fuzz-laden grooves since 2013. The band layers languid, smoke-wreathed riffs over pounding rhythms in the tradition of classic stoner doom.

Manicomio Zero is a death and doom metal band from Savona, Italy, formed in 2016. Their Italian name meaning "asylum zero" captures the madness-tinged heaviness of their doom-death.