Spawnsire is a black/death metal band from Chicago, Illinois, formed in 2019, fusing the cold, dissonant textures of black metal with the heaviness and malevolence of death metal in the tradition of Chicago's prolific extreme metal underground.

Spazmic is a brutal death metal and goregrind band from El Paso, Texas, formed in 2008, operating at the extreme end of the underground with dense, abrasive recordings that blend the gore-splattered imagery and brutality of the genre's most uncompromising practitioners.

Speak of the Devil is a thrash and death metal band from Roanoke, Virginia, formed in 2012, merging the riff-forward aggression of thrash with death metal heaviness in the tradition of the East Coast underground.

Spear is a death metal band from Mesa, Arizona, active since 2016, delivering straightforward, punishing death metal rooted in the genre's foundational aesthetics. Their work favors crushing riffs and direct brutality over stylistic embellishment.

Spear Siege is a Texas blackened death metal act formed in 2025, combining the aggression of death metal with the cold, blasting ferocity of black metal. A newly emerged project, they represent the current wave of extreme metal coming out of the Lone Star State.

Species Splicer is a Lynnwood, Washington band formed in 2017 that operates in the overlapping territory of blackened brutal death metal and deathcore. Their sound grafts the chromatic density and guttural extremity of brutal death metal onto deathcore's breakdown-heavy architecture, with black metal atmosphere woven throughout.

Speckmann Project is the ongoing death metal vehicle of Paul Speckmann, the American vocalist and bassist best known as the driving force behind Master, one of the founding bands of the American death metal scene. Reactivated in 2022 and based around Uherské Hradiště in the Czech Republic, where Speckmann has long resided, the project continues his decades-long tradition of stripped-down, riff-forward death metal.

Spectral Blood is a Tampa, Florida death/black metal band formed in 2018, drawing from the city's legendary extreme metal lineage while incorporating the cold menace of black metal. Their sound merges Floridian death metal's thick, churning low end with black metal's atmospheric hostility.

Spectral Damnation is a progressive heavy and power metal band from Kingston, New York, formed in 2018, blending the epic melodic ambition of power metal with progressive metal's structural complexity. Their music favors expansive arrangements, technical proficiency, and soaring vocal dynamics.

Spectral Descent is a New Jersey death metal band formed in 2017, pursuing a sound built on technical riffing and downtuned aggression in the tradition of the American death metal underground. Their work reflects the dense, oppressive character that defines the East Coast extreme metal scene.

Spectral Manifest is a Houston, Texas black/death metal band with roots going back to 2009, one of the longer-running acts operating at the intersection of those two genres in the state. Their work blends the infernal density of death metal with the blasphemous atmosphere of black metal in the tradition of South American and European underground extremity.

Spectral Voice is a death/doom metal band from Denver, Colorado, formed in 2015, known for crushing slow-motion heaviness and cavernous, sepulchral atmosphere that draws comparisons to early Autopsy and Paradise Lost; they share members with Blood Incantation.

Spectral Voices is a progressive/melodic death metal band from Brooklyn, New York, active since 2005, blending technical death metal aggression with melodic sensibilities and progressive song structures.

Spectre of War is an Austin, Texas band formed in 2021, combining the ferocity of death metal and thrash with the raw, anarchic energy of crust punk into a relentless, war-torn sonic assault.

Spektralaeon is a death/black metal band from Wisconsin, formed in 2016, blending the technical brutality of death metal with the cold, dissonant aggression of black metal.