A Maine-based act weaving together death metal brutality, melodic death metal leads, and thrash aggression, B-Rex-Tron has been active since 2021 and represents the cross-genre sensibility of the contemporary underground.

Allentown, Pennsylvania's B.O.T. stepped into the thrash underground in 2023, carrying on the Lehigh Valley's working-class metal tradition with the no-frills riff-forward intensity the genre demands.

South Carolina black metal act Baasthyrian was active in the early 2010s, releasing a self-titled EP and the single Womb Evacuation before going silent — a brief but uncompromising entry in the region's underground black metal history.

Salt Lake City heavy metal outfit Bacalou, active since 2023, takes their name from the Haitian Vodou spirit of death and darkness — an evocative foundation for a band bringing classic heavy metal energy to Utah's emerging metal underground.

Trenton, New Jersey thrash metal band that has been active since 2009, representing the Garden State's underground metal scene with a straight-ahead aggressive approach to the genre.

Joliet heavy/thrash act formed in 2025 blending traditional heavy metal songcraft with the aggressive edge of thrash, reflecting the Chicago metro area's enduring appetite for aggressive underground sounds.

Thrash metal band from Covington, Georgia with tracks including King KroK and Black Infusion, delivering no-frills thrash to the Southern underground.

Los Angeles crossover/thrash and grindcore band formed in 1989 by Keith Aazami and Dirk Rogers, maintaining a relentless output across three-plus decades that includes Lynch the Weirdo (2004), Worship of Fear (2015), Taught to Fear (2022), and Decency Anomaly (2025).

Brookfield, Wisconsin progressive and thrash metal band that eventually changed names, blending technically demanding thrash riffing with progressive song arrangements.

Portland, Oregon thrash metal band formed in 2017, delivering straightforward Bay Area-influenced thrash from the Pacific Northwest underground.

Smithtown, New York thrash metal band formed in 2014, playing no-frills thrash on Long Island's underground circuit.

Seattle progressive thrash and death metal band pushing the genre's technical boundaries with dynamic shifts and complex arrangements since their formation in the mid-2010s.

Pittsburgh thrash metal band driven by apocalyptic and fear-soaked themes, active from 2001 on B-Headed Records and appearing on the 2003 Milwaukee Metal Fest Compilation via Nightfall Records.

Thrash metal band from Austin, Texas, formed around 2021 and active in the city's heavy underground.

A thrash metal band from Nanuet, New York that formed in 1987 under the full name Cymon Bar Sinister, operating independently before dissolving.