A California progressive death metal project formed in 2024, Sinthetik Sentienz blends the harmonic complexity and compositional ambition of progressive metal with the brutality and technical demands of modern death metal.

Los Angeles, California's Sinyells have built a sound since 2019 that layers industrial metal's mechanized, abrasive textures into a metalcore framework, producing music that feels digitally hostile and physically aggressive in equal measure.

Modesto, California's Siom have been working in raw black metal since 2015, producing intentionally lo-fi, caustic material that prioritizes atmosphere and malevolence over any concession to modern production standards.

Fairfax, California's Siphoner is a young black metal project formed in 2024, working in the Bay Area's fertile underground scene and drawing on the raw, unadorned traditions of atmospheric and orthodox black metal.

A California atmospheric black/death metal act active since 2015, Sire melds the sweeping, post-influenced atmospherics of atmospheric black metal with the crushing brutality of death metal, crafting dense and layered sonic environments.

Los Angeles, California's Sirenhex play traditional heavy metal forged in the city's sprawling underground scene since 2018, channeling the genre's foundational energy into material that owes a clear debt to classic metal's twin virtues of hooks and power.

Los Angeles outfit formed in 2014 who fuse the twin-guitar melodicism of Scandinavian death metal with power metal's soaring sensibility, resulting in music that is both technically demanding and built around hooky, anthemic structures. Their sound draws equally from In Flames-era melodeath and the more grandiose end of American power metal.

Los Angeles doom and heavy metal band formed in 2015, conjuring a ritualistic, occult-tinged atmosphere through slow tempos, commanding riffs, and deliberate pacing. Their name signals an affinity for the ceremonial side of doom metal, and their LA setting has long been fertile ground for that style.

Orange County, California melodic death metal band with roots going back to 2004, giving them over two decades in a scene that has seen plenty of turnover. Their melodic death approach is steeped in the Gothenburg tradition, applying it to the sun-baked Southern California underground.