Boston, Massachusetts death and thrash metal band formed in 2011, combining the technical precision and brutality of death metal with the relentless velocity of thrash in the tradition of the New England extreme metal underground.

Tucson, Arizona black and death metal band formed in 2015, fusing the savage extremity of both genres into a dark and violent sound shaped by the arid, unforgiving environment of the Sonoran Desert underground.

Baltimore, Maryland sludge, thrash, and hardcore outfit formed in 2001, known for dense, churning arrangements that blend the caustic brutality of sludge metal with thrash-derived aggression and hardcore intensity, placing them among the most distinctive acts in the mid-Atlantic underground.

Swarmcatcher is a doom and sludge metal band from Grafton, Massachusetts, formed in 2022, dealing in slow, crushing riffs and oppressive heaviness rooted in the New England underground.

Salt Lake City's Swarmer blends post-metal, sludge, and stoner metal into expansive, riff-heavy soundscapes, drawing on the high desert's isolation for their dense, layered approach since forming in 2018.

Swarmlord is a black metal act from El Paso, Texas, active since 2013, channeling raw aggression and cold atmosphere from the border region's harsh landscape.

Formed in Los Angeles in 2021, Swartvoud crafts atmospheric black and doom metal with a cavernous, melancholic depth, blending slow-burning doom passages with frost-covered black metal atmospherics.

Los Angeles-based Swartwoud has operated since 2013 at the intersection of black metal, sludge, and crust punk, with an ambient undercurrent running through their abrasive, lo-fi recordings.

Swarzo is a symphonic and power metal band from Wilton, New Hampshire, formed in 2020, building melodic, orchestrally enriched metal in the tradition of European power metal.