Rockville, Connecticut's Cable underwent a dramatic stylistic transformation over their long career — from metalcore and hardcore beginnings in 1994 through to atmospheric sludge metal — earning placements on Hydra Head Records compilations and an Eyehategod tribute record.

A sludge and doom outfit from Dover, New Hampshire, Cactus Hag fuses southern-inflected heaviness with slow, grinding tempos and a grimy, feedback-drenched sound.

Hailing from Watertown, New York, Cacus plays stoner and doom metal rooted in thick, mid-paced riffing and a hazy, amplifier-worshipping aesthetic.

Oakland sludge metal/grindcore/powerviolence band on Youth Attack, channeling war, hate, and anti-humanity themes through abrasive, maximally aggressive music.

Call of the Void formed in Denver, Colorado around 2010, formerly operating as Ironhorse, and quickly established themselves as one of the heaviest acts in the American underground by blending grindcore blast beats with crust punk grit and sludge metal weight. Signed to Relapse Records, the band released Dragged Down a Dead End Path (2013), Ageless (2015), and Buried in Light (2019). Their approach draws equally from 1980s hardcore aggression and the nihilistic density of doom.

Allentown, Pennsylvania's Call Off Dead traffic in doom and sludge metal, stacking slow, oppressive riffs into a dense wall of sound since 2019.

Ohio-based sludge/punk hybrid that mashes the crawling heaviness of sludge metal with punk's raw, stripped-down hostility.

Atlanta instrumental sludge/post-metal duo formed in 2023, contributing to the growing Southern underground with crushing, wordless heaviness.

Saint Paul, Minnesota progressive sludge and groove metal band active since 2010, weaving horror and Norse/Viking imagery into their heavy, layered sound.