Hellmotz is a Southern/Thrash Metal band from Campo Grande, Mato Grosso do Sul, Brazil, formed by vocalist and founding member Hélio Guará. The band blends aggressive thrash with a Southern rock sensibility and released several recordings including the demo EP "Redneck Rampage", the full-length "South Born" (2014), and the single "To Forge a Soul" (2016).

HellNoise is a death/thrash metal band from Viña del Mar, Chile, who recorded their debut album "Hell Is Here" in Viña del Mar between May and July 2022. The nine-track record was mixed and mastered in Barcelona, Spain, and released independently on September 1, 2023.

Hellraider is a thrash metal band from Melipilla, Chile, founded in 2007 by members including former Disaster musicians Fredy Díaz and Hernaldo Tapia. The band built a substantial catalog with the debut full-length "The Revenge of Pork Head" (2011), the demo "The Time Has Come" (2014, released on tape by Street Metal Blasphemy), and the "Insanity" demo track in 2017.

Hellven is a death/thrash metal band from Itapecerica da Serra, São Paulo, Brazil. The band features a lineup of Edu on vocals and guitar, Kinho on guitar, Welker on bass, and AD on drums, playing aggressive extreme metal rooted in the São Paulo underground scene.

Hexagram is a death/thrash metal band from Batuco, in the Santiago metropolitan area of Chile. The band is unsigned and independent, with lyrical themes centered on religion, death, and slaughter.

Hicsos is a thrash metal band from Rio de Janeiro, Brazil, founded in 1990 and one of the city's longest-running acts in the underground scene. Their sound fuses thrash with hardcore, addressing themes of religion, politics, and social conflict, and they have documented their run with albums including Eatin' Concrete (2004), Technologic Pain (2007), and Circle of Violence (2011), the last of which was re-released in 2018 with a DVD documentary titled 26 Years of Thrash Violence. The band is signed to Metal Blast Records and remains active.

Hollowpoint Damage was a groove/thrash metal band from São Paulo, Brazil, formed in 2025. The band released the EP Killing Disorder in July 2025, their sole recorded output before splitting up.

Hombre Viejo is a black/thrash metal band from Necochea, Buenos Aires, formed in 2012 and currently active. Their discography spans four albums: Solitario Ser (2012), En la Quietud del Tiempo (2014), Del Fuego (2016), and Nueva Salida del Sol (2018), with lyrical themes centered on nature, occultism, and humanity.

Horny for Blood were a crossover thrash band from São Paulo, Brazil, formed in 2013. They released the eight-track EP "Vomithrash" in December 2013, a fast-paced collection drawing comparisons to acts like D.R.I. and Brazilian hardcore legends Ratos de Porão, with Portuguese-language songs covering topics ranging from urban life to social commentary.