Hammerthrash was a thrash metal band from Patos de Minas, Minas Gerais, Brazil, active from 2010 until splitting up in 2019. The band self-released a six-track self-titled EP in February 2010 via Bandcamp, featuring palm-muted riffing and aggressive vocals rooted in classic thrash. They remained an independent act throughout their existence.

Hate Spectrum is a solo thrash metal and deathcore project from Rio de Janeiro, Brazil, founded in 2022 by Eder Santana, a former member of Gangrena Gasosa. The project released the full-length album Egotrip in January 2023, a 13-track record preceded by several singles released throughout 2022.

Hateclash is a thrash metal band from Antofagasta, Chile, playing fast, aggressive street thrash in the tradition of crossover and metal punk. The band released their debut demo in 2008, followed by the EP "Enraged Facing the Outside" in 2009 and the full-length "Daily Shit" in 2019.

Headthrashers is a thrash metal band from Cascavel, Paraná, playing aggressive, politically charged metal with an explicitly anti-fascist stance. The band has released albums including Insurreição and Campos de Batalha, channeling the raw energy of classic speed and thrash metal from within Brazil's southern underground scene.

Heavenly Kingdom is a heavy/thrash metal band from Cubatão, São Paulo, Brazil. The band's lineup includes Brenno Lima, Leandro Dias, Vagner Mesquita, and Bruno Conrado, and their discography spans multiple full-length albums including Tears From The Sky, Nature In Fury, and Slave Of Time, released through Heaven's Music.

Hellbanger is a death/black/thrash metal band from Salvador, Bahia, Brazil, formed in 2021 and operating in the tradition of South American satanic speed metal. The band released the EP Satanic Speed in 2021 and followed it with the split album Satanic Speed & Bloody alongside Annihilation in 2023, with Hellbanger's tracks classified on Metal Archives under themes of War, Antichrist, and Death.

Helldog is a thrash metal and crossover band from Palmeira das Missões, Rio Grande do Sul, Brazil, operating under that name since 2015 after previously performing as MadDog from 2010. The band is active in the local scene and has recorded at Estúdio Play in Palmeira das Missões, with their socially themed approach rooted in classic Brazilian thrash and hardcore crossover.

Hellflight is a heavy and thrash metal band from São Paulo, Brazil, formed in 2016. The band released early recordings as Demos 01 and issued the single Mosh Pit Kerosene, establishing themselves as part of the independent São Paulo metal underground.

Hellish is a thrash metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2020. The band released the EP "Internal Uprising" in December 2025, featuring tracks including "Echoes of Oppression" and "Scars of an Internal War". They release independently through their Bandcamp page under the handle hellish-bh.