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- Mach One (MySpace)
- MySpace muziekprofiel voor Mach One met tourdata, tracks, video’s, afbeeldingen, blogs, informatie over bands, downloads en meer
- Machiavel (Official)
- Madame Claus
- Magellan
- The Magic Elf
- Magic Pie
- Magna Carta
- Magrathea
- Bruce Main
- Pepe Maina
- Makkiwhipdies
- Man on Fire
- Mangala Vallis
- Mangrove
- Mangrove, the art of rock. Mangrove is een progrockband met sterke symfonische invloeden. Welcome to the official Mangrove website! Mangrove, the progressive rock sensation! Do you happen to like rough Hammond sounds, spacy Mellotron choirs combined with magnificent guitars, solidly supported by innovative drums and a driving bass? You've come to the right spot!
- Guy Manning
- Mansion Maze
- Mantikhoras
- Tributary Music
- Marillion (Official)
- Marillion (The Racket Club Online)
- The Mars Volta
- Mastermind
- Mastheria
- Mastheria, prog/symfo band
- Mathematicians
- Maury E I Pronomi
- Maximum Indifference
- MegaXBrand
- Hubi Meisel
- Merchants Vice
- Metaphor
- Renate Methöfer
- Mindcage
- Mindgame
- Mind's Eye
- Minstrel
- Missionfinger
- Mister Kite
- Modest Midget
- The homepage of the Alternative Progressive Rock band Modest Midget
- MohoDisco
- (Welcome to the) Moonlight Circus
- Moonlit
- Morning
- Morphelia
- Neal Morse
- Scott Mosher
- Mostly Autumn
- Mother Matrix
- Jonathan Mover
- Eddie Mulder
- Museo Rosenbach
- Mystery