Mountains of Mine is a progressive stoner metal band from the UK, formed in 2020. They blend progressive ambition with stoner metal's fuzzy grooves.

A progressive death metal act from the Västmanland town of Hallstahammar, Mourning Sign has been crafting ambitious compositions since 2017. The band pushes death metal into progressive territory.

Mouthpeace is a progressive death/thrash metal band from Stockholm, Sweden, formed in 2012. They forge aggressive extreme metal at the crossroads of death and thrash.

Mr. Gul is a progressive metal band from Malmö, Sweden, formed in 2002. They craft intricate progressive compositions with technical ambition.

Mudslider is a progressive thrash, heavy, and death metal band from Normandy, France, formed in 2025. They blend progressive ambition with the aggression of thrash, heavy, and death metal.

Muhūrta is an oriental folk and progressive metal band from Paris, France, formed in 2024. They fuse Eastern folk traditions with progressive metal's technical complexity, creating a culturally rich sonic tapestry.

A progressive death metal act from the southern Portuguese town of Vila Real de Santo Antonio on the Spanish border, Mundana has been crafting ambitious compositions since 2017. The band channels the Algarve's southernmost point into complex, genre-pushing death metal.

A progressive metal act from Kaiserslautern with a tongue-in-cheek name, Murder She Wrote blends technical riffing with unconventional song structures. Formed in 2013, the band pushes beyond the confines of straightforward metal into more adventurous compositional territory.

Murder Therapy is a progressive death and metal act from Bologna that has evolved from their heavier early sound into more adventurous progressive territory since 2008. The band represents the intellectual side of Emilia-Romagna's deep metal underground.