M.A.C.E. is a thrash metal band from Terni, Italy, formed in 2024. They deliver fierce thrash metal from the Umbrian region.

Bronza is a thrash metal act from Zagreb, active since 2020. The band channels the aggressive energy of classic thrash into the Croatian capital's growing metal underground.

M.G. is a thrash metal act from Navahrudak, Belarus, formed in 2020 that channels the aggression and speed of classic Eastern European thrash. The project delivers uncompromising riff-driven material rooted in the Belarusian underground metal scene.

M.I. is a thrash/groove metal band from Arendal, Norway, formed in 2023. They blend thrash metal's velocity with groove metal's rhythmic punch.

M.I.S. is a thrash metal and crossover band from Schaffhausen, Switzerland, formed in 2020 that channels explosive energy through a fusion of thrash aggression and hardcore punk attitude. Their riff-heavy approach bridges the gap between old-school thrash intensity and the raw directness of crossover.

A crossover thrash and hardcore act from Knokke-Heist active during the late 1980s, M.O.P. (Mistress of Pain) released two demos—Just Kidding and The Revenge of the Nerds!—during their brief but active 1988–89 run. The band were part of the early wave of Belgian bands bridging punk aggression and thrash metal energy.

M:D:A is a melodic death/thrash metal band from the Bünde/Bielefeld area of Germany, formed in 2020. Their sound merges the harmonic sophistication of melodic death metal with the aggressive urgency of thrash, emerging from the North Rhine-Westphalia underground.

Macaca Fuscata is a Spanish-language metal trio from Madrid, Spain, consisting of bass/vocals, guitars, and drums. Their catalog includes the tracks 'Circo Canibal,' 'Mi novia es un walking dead,' and 'Tradición secular,' blending heavy instrumentation with Spanish-language vocals.

MacAnimal were a hard rock and heavy metal band from the Amstetten-Ybbstal area of Lower Austria, active through the first half of the 1990s with an internationally composed lineup. The band built a strong regional following across the Mostviertel and beyond, playing the stages of the Austrian metal circuit during a formative era for the domestic scene. They are documented in the Encyclopaedia Metallum under groove and thrash-inflected heavy metal.