Stab! Stab! Stab! is a metalcore band from Pittsburgh, Pennsylvania, active since 2003, bringing an aggressive, no-frills approach to the genre shaped by the city's hardcore underground.

Stallionslaughter is a groove metal and metalcore band from Tulsa, Oklahoma, formed in 2016, blending groove metal's mid-paced riffing and swagger with the aggression and breakdowns of metalcore.

Stand Ablaze is a Pocatello, Idaho melodic death metal and metalcore band formed in 2021, combining the melodic harmonic sensibility of Scandinavian-influenced death metal with the structural intensity of metalcore.

Stand Defiant is an Asheville, North Carolina band formed in 2019, blending the raw aggression of crossover thrash with metalcore's structural intensity and the speed and riff density of traditional thrash.

Philadelphia avant-garde metalcore veterans with roots going back to the late 1980s, Starkweather evolved from raw hardcore-influenced metalcore into one of the most unconventional and challenging acts in extreme American metal, known for dissonant compositions and uncompromising artistic vision.

San Antonio, Texas melodic death metal and metalcore band formed in 2016, Start a War fuses the melodic aggression of Swedish death metal with the breakdowns and intensity of modern metalcore.

Hayward, California metalcore and melodic death metal band formed in 2025, State of Reliance blends the hook-driven intensity of metalcore with the melodic riff vocabulary of death metal.

Portland, Oregon power/thrash metal band formed in 2012, State of the Art combines the soaring vocals and anthemic drive of power metal with the speed and aggression of thrash.

Stigmata is a metalcore band from Troy, New York, formed in 2008, incorporating strong influences from crossover thrash, groove metal, and traditional thrash metal. Their sound reflects the hybrid, street-level aggression common to the upstate New York underground metal community.

San Diego melodic death metal and metalcore act formed in 2004, blending aggressive riffing with melodic hooks in the tradition of the early 2000s West Coast extreme metal scene.

Brooklyn thrash and hardcore band formed in 2011, channeling the aggressive cross-pollination of New York hardcore and Bay Area thrash into a tight, pit-ready attack.

Rancho Cucamonga, California band formed in 2017 that merges death metal, thrash, and metalcore influences into an aggressive style rooted in the Inland Empire's active extreme metal underground.

Storm the Sun is a Dallas, Texas band formed in 2013 that operates at the intersection of progressive metal and metalcore, combining technical ambition with heavy, rhythmically aggressive passages.

Stormscaper is a post-metal and metalcore band from Indianapolis, Indiana, formed in 2020, weaving the textural density of post-metal with metalcore's aggressive dynamics and emotional intensity.

Straight Line Stitch is a Knoxville, Tennessee band formed around 2008 that evolved from nu-metal roots into metalcore, distinguished by the powerful vocals of frontwoman Alexis Brown and a devoted following in the underground metal scene.