Toledo, Ohio progressive death metal band formed in 2024, pursuing technically ambitious compositions that push the boundaries of conventional death metal.

Sullvation is a Chicago, Illinois progressive heavy/power metal band formed in 2022, weaving together melodic power metal hooks, progressive structures, and the raw energy of classic heavy metal.

Summoner's Circle formed in Knoxville, Tennessee in 2015, crafting a theatrically dense blend of doom, black, death, and progressive metal the band describes as 'Epic Metal.' Drawing influence from Dimmu Borgir, Fleshgod Apocalypse, and Opeth, the six-piece builds elaborately structured compositions around original mythology and occult imagery. Their 2024 album Cult, released on Black Lion Records, functions as a concept piece confronting organized religion, partly inspired by controversy surrounding a metal festival in their home state.

Sumptus Ignis is a progressive death/doom metal band from Key Largo, Florida, formed in 2017, weaving dense, slow-burning compositions that balance mournful doom passages with technical death metal aggression.

Suncinder is a Detroit, Michigan act formed in 2019 that melds progressive melodic death metal with deathcore, layering technical riffing and melodic complexity over punishing, breakdown-driven passages.

Sunlander is a progressive/thrash metal band from Norman, Oklahoma, formed in 2017, combining the rhythmic aggression of thrash with the compositional complexity and time-signature experimentation of progressive metal.

Sunless are a progressive death metal band from Minneapolis, Minnesota, formed in 2016, known for intricately layered compositions that blend dissonant technical death metal with atmospheric and avant-garde sensibilities. Their work draws comparisons to Gorguts and Ulcerate in its dense, labyrinthine approach to extreme music.

Sunrise Dreamer is a progressive metal project from New York, formed in 2021, pursuing the melodic and compositionally ambitious side of the genre with a focus on dynamic songwriting and technical musicianship.

Sunrunner is a heavy metal and progressive rock band from Portland, Maine, formed in 2005, blending melodic hard rock sensibilities with progressive metal structures in a sound informed by the classic and modern ends of the genre.