Brooklyn's Clovis play a wall-of-sound doom and stoner rock blend steeped in grunge and classic heavy riffing. Their self-titled LP documents a band content to let the volume speak for itself.

A Flint, Michigan act working across melodic death metal, thrash, and straight death metal, Clovis bring a midwest blue-collar grit to their extreme metal sound. Their approach draws on the long lineage of Michigan's underground metal heritage.

A one-man gangsta slam project from Ohio, Clown Vomit channel the most cartoonishly brutal end of slam death metal with unapologetic absurdity. Their 2025 album Section 8 Slamz: Seezun 1 leans all the way into slamming low tunings and gutter-level aesthetics.

Seaside, California's Clownhouse blend death metal heaviness with thrash metal's velocity into a raw, aggressive attack. Their work fits naturally within the broader California tradition of uncompromising underground metal.

Denver's Clusterfux have been the Mile High City's crossover thrash standard-bearers since 1995, combining hardcore punk's aggression with thrash metal riffs into a relentless, politically charged attack. Active again since 2017 and signed to Beer City Records, their latest album Defy keeps the fury very much alive.

Germantown, Maryland's Clutch have spent over three decades as one of rock's most reliably excellent bands, evolving from hardcore punk origins into groove-laden, blues-infused hard rock. Neil Fallon's encyclopedic lyrical references and commanding baritone drive albums like 'Blast Tyrant' and 'Earth Rocker,' which overflow with riffs thick enough to stand on. Their refusal to chase trends combined with a legendary live show has earned them one of the most passionate cult followings in rock music.

Philadelphia's Clutch of Mammon is a one-man black and doom metal project with psychedelic undertones, releasing a steady stream of albums and EPs including Zrada and Alma. The project balances raw atmospheric black metal with oppressive doom, operating as an independent and prolific solo endeavor.

Rochester, New York's Clyde play a heavy, riff-centered stoner rock and metal blend rooted in the upstate New York underground. Their straightforward approach relies on massive tones and slow groove.

A highly obscure black metal and experimental project from Michigan, Cnilaoxex operate at the fringes of the underground with a sound that prioritizes noise and abstraction over convention. Details about the project remain sparse, which seems entirely intentional.