Scott Kelly is the longtime frontman of sludge-doom legends Neurosis, and his solo work — launched in Oakland in 2001 — strips the massive amplification away to reveal something rawer and more intimate: acoustic folk, sparse progressive structures, and the same scarred emotional intensity that defines his work with his main band. His voice, weathered and confessional, carries the weight of decades of extreme music through arrangements built on fingerpicked guitar and quiet devastation. It is metal's spirit filtered through folk's bones.

San Francisco technical/progressive death metal band formed in 2016, operating in a Bay Area tradition of cerebral extremity. Their music pushes at the architecture of death metal, favoring labyrinthine song structures and technical precision.

San Diego's Serpentyne draw from three directions at once — progressive, thrash, and power metal — resulting in a dynamic, melodically rich hybrid that has been sharpening its edge in Southern California's metal scene since 2018.

Out of Diamond Springs in the California Sierra Nevada foothills, Shadowkiller have been crafting progressive power metal since 2013 with an emphasis on technical ambition and expansive songwriting. Their music reaches for the soaring grandeur of European power metal while threading in the compositional complexity of the progressive side of the spectrum.

Palm Springs, California's Shrine of Resurrection, formed in 2021, pursue progressive death metal filtered through metalcore's structural sensibility — ambitious compositions that balance technical complexity with the direct aggression of the modern heavy underground.

San Diego progressive metal project Singularity Architect launched in 2024 with a conceptually ambitious approach to the genre, weaving intricate arrangements and technical musicianship into expansive song structures. As a recently formed act in the fertile Southern California progressive metal scene, they draw on the region's tradition of technically driven heavy music.

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.

Hailing from Ontario, California, Slanderus blend thrash ferocity with progressive architecture, building songs that shift between angular riffing and more expansive, technically minded passages. Active since 2013, they represent the Inland Empire's commitment to metal that rewards close listening.

San Diego progressive metal outfit formed in 2022, blending metal's technical weight with hard rock's melodic sensibility into an accessible yet complex sound. Slavior occupy a crossover space where progressive structure meets arena-ready hooks.