Los Angeles grindcore outfit H.A.R.M. has been blasting through the Southern California underground since 2018, delivering the kind of short, violent bursts that the genre demands. Their name functions as a mission statement.

Northampton, Pennsylvania's Hackpeter mashes death metal's surgical brutality against grindcore's frantic brevity, producing a sound that's equal parts calculated and chaotic since their 2019 formation.

Portland's Hacksaw brings a grind-splattered death metal sound to the Pacific Northwest underground, their jagged attack and economical song structures marking them as a product of the city's adventurous extreme scene since 2016.

Columbus, Ohio's Hadak Ura is one of the more unorthodox acts to emerge from the Midwest's extreme metal scene — a grinding black metal project that fuses the frozen hatred of black metal with the frenetic velocity of grindcore since 2015.

Milwaukee's Half Gorilla are one of the newer acts blurring the line between grindcore and death metal, bringing chaotic speed and blunt force to the Wisconsin underground since 2023. Short songs, maximum damage.

One of Maine's most idiosyncratic metal acts, Hallowed Butchery have spent over fifteen years refusing to settle — beginning as a black/grind project and gradually morphing into something incorporating doom, folk, and experimental elements. Based in Kennebec County, their music sounds like it grew out of the woods rather than any rehearsal space.

Rochester's Hallucination Realized play grindcore with the frantic urgency the format demands — short, explosive, and loud enough to rattle teeth. Part of a small but active upstate New York extreme underground since 2018.

Named with sardonic humor, Dover, Pennsylvania's Hamilton Fish have been grinding out death metal and grindcore since 2019 — short, vicious songs that waste no time and take no prisoners.

Fresno's Hands That Kill arrived in 2025 swinging a chaotic three-way hybrid of death metal, thrash, and grindcore — short, fast, and built to draw blood from the first second.

Don't let the name fool you — Dyer, Indiana's Handsome Prick play brutally earnest grindcore and death metal, delivering short blasts of punishing noise with zero irony since 2016.

Painesville, Ohio's Hangnail have been grinding away since 1998, their thrash and grindcore roots keeping them lean and mean across nearly three decades of relentless, no-frills extremity.

New Orleans' Hangnail have dealt in death metal and grindcore since 1998, pairing the city's swampy, heavy undercurrent with the kind of blasting ferocity that demands short, vicious songs.

Chicago's Harpoon bring the controlled chaos of grindcore to the thrash metal framework, producing music that's fast, violent, and barely contained since 2014. Their sound has the aggression of both genres and the patience of neither.

Worcester, Massachusetts's Harvest Manipulation weaponize black metal, death metal, and grindcore into a chaotic, multi-headed assault that refuses to stay within any single genre's borders. Active since 2018, they operate in the most extreme margins of the heavy underground.

Pennsylvania's Hashgrinder emerged from the Poconos in 2015 fusing death metal's grotesque power with grindcore's short-fuse aggression. Their approach is blunt and efficient — songs that hit hard and end before the bruise has time to form.