Austin one-man instrumental metal project by David Menendez ranging freely across thrash, doom, black, and progressive metal, treating each release as a genre-spanning compositional exercise.

Cave In formed in Methuen, Massachusetts in 1995, beginning as a metalcore act before undergoing one of the more dramatic stylistic evolutions in underground heavy music, shifting from the technical aggression of Until Your Heart Stops (1998) to the sprawling space-rock of Jupiter (2000). They signed to RCA Records and released the alternative rock-oriented Antenna in 2003, then went on hiatus in 2006 before reforming in 2009 and returning to heavier territory. The band remains active and is regarded as a key bridge between hardcore, progressive rock, and post-metal.

Miami duo of Venezuelan origin playing epic, shifting doom and progressive metal that moves between trudging heaviness and soaring melodic passages, with deep operatic vocals and classical guitar grandeur reminiscent of Rainbow and early Rush.

Oakland, Maryland's Cavern blend progressive metal's structural ambition with sludge heaviness and thrash metal's rhythmic aggression, producing a genre-spanning sound that shifts between cerebral complexity and sheer sonic weight.

Houston's Cavyrns blend doom metal's heavy, slow-moving gravity with progressive metal's compositional ambition, building songs that evolve deliberately through dynamics and tonal shifts.

Baton Rouge's Cea Serin were a technically proficient progressive metal act combining intricate, jazz-influenced guitar work with the melodic ambition of bands like Fates Warning and Symphony X.

Celestial Sovereignty is a progressive black/death metal band from Modesto, California. They blend the sinister atmosphere of black metal, the brutality of death metal, and the compositional complexity of progressive metal into multi-layered compositions.

Cellar Vessel is a progressive death metal band from Bozeman, Montana, combining the technical complexity and unconventional song structures of progressive metal with the crushing aggression and guttural extremity of death metal.

Cement Head is a doom and progressive metal band from Boulder, Colorado, combining the slow, heavy riff cycles of traditional doom with progressive arrangements and dynamic range drawn from classic heavy metal.