Fossilization is a death/doom metal duo from São Paulo, Brazil, formed around 2020–2021, featuring members also known from the sludge/doom band Jupiterian. The band debuted with the EP He Whose Name Was Long Forgotten in 2021 on Everlasting Spew Records, followed by the full-length Leprous Daylight in 2023 and the sophomore album Advent of Wounds in February 2026, all released through Everlasting Spew.

Fosso is a black metal duo from São Paulo, Brazil, formed in 2021, consisting of Pedro Alves on guitar, bass, and vocals, and Victor Miranda on drums. The band released their debut album Solo Amargo in June 2021, a claustrophobic eight-track record recorded and mixed by the duo between March and April of that year.

Fourkaos is a heavy/thrash/groove metal band from Campina Grande, Paraíba, Brazil, formed in 2019 by vocalist/guitarist Johnny Glaydson, lead guitarist Matheus Oliver, bassist Matheus Henrique, and drummer Rodolfo Diniz. The band released their debut album "Remnants of Sanity" in July 2019, an eight-track record blending thrash aggression with melodic and progressive elements. Their sound draws on multiple strands of heavy metal while maintaining a cohesive identity described as both modern and organic.

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.

Frater is a melodic death metal and metalcore band from Buenos Aires, Argentina, whose discography spans over a decade including "Into the Light" (2012), "Pulso en Eclipse" (2017), and "Sangre y Viento" (2024). Core members Andrés Bori on guitar and vocals and Andrés Zadunaisky on bass have appeared across multiple releases, with Juan Orcajada joining on vocals for the 2024 album.

Fratura is a one-man black metal project from São Paulo, Brazil, created at the end of 2019 by the sole member known as Corposeco. The project channels raw black metal through the lens of crust punk, d-beat, and powerviolence, a hybrid the artist calls "Black-Beat," combining lo-fi sonic violence with antifascist and anarchist themes. The debut album "Corposeco" was released in August 2020 and received a remastered edition in June 2022, which included a cover of Mayhem.

Freak Maniacs are a goregrind trio from São Paulo, Brazil, formed in 2022, consisting of Thales Gory on guitars and vocals, Igor Dead on bass and growls, and Huevo on drums. The band released their debut album "Various Stages Of The Murder Process" in January 2022, recorded at Sotão Estúdio in the Pirituba district of São Paulo and mixed and mastered by Simon Nicolas of Vergoten Records. Their sound blends gore-obsessed lyrical themes with sludge-inflected grind brutality.

Frenetic Trio are a death 'n' roll and psychobilly band from Londrina, Paraná, Brazil, active since 2005. The band combines the heaviness of death metal with the driving rhythms and voodoo atmosphere of psychobilly, producing a sound geared toward the darker end of the genre. Their self-titled debut was recorded at Audio Sonora Studios in Londrina in June 2004 and released in 2005, and the band has remained active in the Brazilian underground ever since.

Freyr is a one-man pagan black metal project from Brazil, active since 2022. The project released the debut album "The Blood of Tharsis" in 2022, followed by the full-length "Ancient Pagan Flame" in May 2023, an eleven-track release distributed through Masters of Kaos. A further full-length, "The Death Embracing," followed in 2024, establishing a prolific output rooted in Norse-pagan imagery and raw black metal aesthetics.