German progressive power/speed metal band from Hof an der Saale, active since 1991 and one of the longest-running acts in this list. Their three-decade commitment spans the evolution of European power and speed metal through progressive complexity.

German progressive death metal band from Warburg, crafting technically ambitious death metal since 2021. Their sound channels progressive complexity through the genre's signature aggression and intensity.

Russian progressive/groove metal band from Moscow, blending technical ambition with rhythmic heaviness since 2007. Their cryptic acronym adds mystery to their nearly two decades of progressive groove.

M-Hunter is a progressive death/gothic metal band from Moscow, Russia, formed in 2020. They push death metal into progressive territory with technical ambition.

Maahlas is a progressive melodic death/black metal band from Oslo, Norway, formed in 2014. They forge extreme metal at the fierce intersection of black and death metal.

Mac Tyroon is a solo progressive metal project from Germany, led by a self-taught guitarist and former frontman who blends groove metal's raw energy with cinematic atmospheres and video game-influenced electronic elements. Releases like the "Evilution" EP showcase compositions that alternate between brutal heaviness and introspective soundscapes.

Mad Act is a progressive stoner and sludge metal band from Amiens, France, formed in 2019. They blend progressive ambition with stoner-sludge metal's crushing, groove-laden heaviness.

Mad Road is a progressive heavy and thrash metal band from Tallinn, Estonia, formed in 2014. They combine progressive metal's technical ambition with the raw energy of heavy and thrash metal.

Mad Smile is a metal band from Moscow, Russia, blending hard riffs with melodic themes and unconventional vocals. Their 2015 album 'Unleash the Lightning' delivers ten tracks where each song has its own distinct character, exploring dark narratives from psychological horror to warfare.