Spaisekult is a Vermont-based progressive sludge metal and hardcore band formed in 2022. They meld the caustic, slow-burning density of sludge metal with hardcore's propulsive urgency and progressive metal's structural ambition, operating on the experimental edge of all three genres.

Technical progressive metal from San Antonio. Ron and Bobby Jarzombek.

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 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.

Spellbinder is a progressive metal band from Clearwater, Florida, formed in 2001, crafting technically proficient and melodically rich progressive metal informed by the genre's classic 1990s era.

Spire is a progressive death metal and metalcore band from Syracuse, New York, formed in 2004, blending technical guitar work and complex song structures with the heaviness of death metal and the intensity of metalcore.

Spirit Molecule is a progressive metal band from Greenville, North Carolina, formed in 2007, known for intricate compositions and a dynamic approach that weaves complex rhythms and melodic passages.

Spiritual Sickness is a progressive power metal band from Long Island, New York, formed in 2012, combining the melodic sweep and clean vocal delivery of power metal with the technical complexity and shifting dynamics of progressive metal.

Los Angeles progressive death metal and deathcore act Sporemacide formed in 2025, combining the technical ambition of progressive metal with the heaviness of death metal and deathcore.

SSR is a Houston, Texas progressive/technical power-thrash metal band formed in 2022, blending the technical complexity of progressive metal with the aggressive drive of thrash and the melodic ambition of power metal.

Indianapolis progressive metal act founded in 2024, StarChaser blends intricate instrumental passages with rock-rooted hooks in the expansive progressive metal/rock tradition.

Fort Smith, Arkansas progressive thrash metal band formed in 2016, Staring into Fire channels the technical aggression of thrash into song structures that incorporate progressive shifts in tempo and texture.

Arizona progressive black metal band formed in 2015, Stars Eat Worlds merges the dissonance and aggression of black metal with progressive song structures that prioritize atmosphere and compositional depth.

Progressive metal act from Sayreville, New Jersey, formed in 2010, blending heavy riffing with dynamic structural shifts and melodic rock sensibilities. Their sound draws from the progressive metal and rock traditions without abandoning accessibility.

Philadelphia progressive power metal band formed in 2022, combining the anthemic melodic drive of power metal with the structural complexity and technical ambition of the progressive tradition.