FireGun is a groove and thrash metal band from Guarulhos, São Paulo, Brazil, formed in October 2009. Their debut EP What's the Reason?, recorded in February 2013 at Estúdio GR in São Paulo, features four tracks and showcases the band's lineup of vocalist Raimundo Rodriguês, lead guitarist Ricardo Oliveira, rhythm guitarist Ivan Santos, bassist Samuel Martins, and drummer Yuri Alexander. The band was working toward a debut full-length titled Inheritance of a Blind Nation as of 2017.

Flashover is a thrash metal band from Brasília, Brazil, formed in the mid-1990s with influences drawn from Kreator, Slayer, and Sepultura. The band released their debut album "Infamous Country" in 2001, followed by "Land of Cannibals" in 2003 on Lethal Records and "Superior" in 2008, establishing themselves as a consistent presence in the Brazilian thrash underground. Their current lineup includes guitarists Fernando Cezar and Itazil Junior alongside drummer Josefer Ayres, who also performs with Phrenesy.

Forceps was a thrash metal band from Taubaté, São Paulo, Brazil that has since split up. The band released the demo "Scars of the World" in 2002, their primary documented output from their active years.

Forget Everything is a thrash metal trio from Piracicaba, São Paulo, Brazil, formed in 2024, featuring Murilo Ramos on vocals and guitar, Mateus Lopes on bass, and João Lima on drums. The band launched with the debut single "Forget Everything" and followed it with the single "Dangers of the Dawn," showcasing a raw old-school thrash sound influenced by Sepultura, Toxic Holocaust, and Municipal Waste.

Forgotten Krypt was a one-man black/thrash/punk project from Uberlândia, Minas Gerais, Brazil, formed in 2014 under the alias Ensamhet. The project's self-titled demo, released on November 20, 2014 through Podreira Records on CD-R, included original tracks alongside a Darkthrone cover and drew influence from Darkthrone, Venom, Toxic Holocaust, and Burzum.

Fractura is a thrash metal and hardcore band from Santiago, Chile, formed in 2023 with a lineup of five members including vocalist Rampage and drummer Bastian. The band recorded their debut EP between August and September 2023, releasing it in April 2024 as a five-track statement of aggressive, pit-focused crossover thrash.

Frustrated Existence is a death/thrash metal solo project from Poço Fundo, Minas Gerais, Brazil, driven by multi-instrumentalist Ruben Alvim, who handles guitars, bass, and vocals. The project released its self-titled debut album in July 2023, a 11-track record recorded between November 2021 and February 2022 in a home studio, with tracks including "Shortcuts to Slavery" and "Implode this Damned System."

Fullgore is a death/thrash metal band from Vila Velha, Espírito Santo, Brazil, founded in mid-2002 by guitarists André Nideck and Gustavo Souza alongside drummer Marcus Vinicius. The band released their debut demo Blessed Sacred Blast in December 2003, a live-recorded effort praised for its tight blend of death and thrash metal.

Fullrage is a heavy/thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2020. They released their debut album, Resurrection Denied, in 2021 through True Metal Records — a ten-track effort with mix and mastering by Ben Hur Lima and cover artwork by Marcelo Vasco.