Erupting from the Pittsburgh hardcore scene in 2015, 156/Silence fuse the poetic intensity of post-hardcore with the aggression of mathcore and metallic hardcore. Named after a measure count on a piece of sheet music, the band channels chaotic energy through dissonant riffs and visceral screams. Their atmospheric yet punishing sound has made them torchbearers for Pittsburgh's resurgent heavy music community.

Better Lovers emerged as a supergroup from the wreckage of Every Time I Die, uniting vocalist Greg Puciato (ex-Dillinger Escape Plan) with ETID guitarist Jordan Buckley, drummer Clayton Holyoak, and bassist Stephen Micciche. Their 2023 debut 'God Made Me an Animal' channels chaotic mathcore fury and experimental edge into one of the heaviest new projects of the decade.

Chamber are a Nashville metalcore band formed in 2017, known for a violent, dissonant style that the group has framed as psychotic mosh metal. Their music pulls from metalcore, mathcore, death metal, hardcore, and industrial-tinged noise, creating songs that feel unstable even when the riffs are tightly arranged. Early EPs such as Hatred Softly Spoken, Final Shape/In Search of Truth, and Ripping / Pulling / Tearing led into full-length records including Cost of Sacrifice and A Love to Kill For, each sharpening the band's taste for odd-time punishment and abrupt mood shifts. Chamber's guitars scrape and twist rather than simply chug, while the drums often move between blast-driven chaos and breakdown weight. The vocals are harsh and desperate, matching lyrics that lean into fear, obsession, violence, and emotional ruin. Nashville is not always foregrounded in national conversations about metallic hardcore, but Chamber make a strong case for the city's heavier underground. Their songs are not designed for passive listening. They are tense, hostile, and physically demanding, but the disorder is organized. Chamber matter because they bring mathcore danger back into metalcore without losing the pit-centered force that makes the music hit in a room.

Emerging from the ashes of The Chariot's sister bands in the early 2000s Solid State Records scene, Douglasville, Georgia's Norma Jean have been one of metalcore's most consistently experimental and uncompromising acts for two decades. Albums like 'Bless the Martyr and Kiss the Child' and 'O' God, the Aftermath' helped define the chaotic, mathcore-influenced end of the metalcore spectrum, while later works like 'Polar Similar' showed their evolution into atmospheric, textured heaviness. Cory Brandan Putman's unhinged vocal approach and the band's refusal to repeat themselves have made them a touchstone of creative heavy music.

Formed in Morris Plains, New Jersey, in 1997, The Dillinger Escape Plan are widely credited with defining mathcore as a genre, their 1999 debut Calculating Infinity establishing a template of ferocious rhythmic complexity, dissonance, odd time signatures, and barely controlled live violence that influenced an entire generation of extreme music. Across six studio albums — including Ire Works (2007) and One of Us Is the Butcher (2016) — the band progressively incorporated melody, electronics, and jazz-influenced experimentation without surrendering the underlying aggression. They disbanded in December 2017 after a farewell run of shows, leaving behind one of the most uncompromising and influential catalogs in 21st-century heavy music.