Antroforce is a thrash metal band from Carapicuíba, in the western zone of greater São Paulo, Brazil, formed as a tribute to the 1980s Brazilian metal underground — citing Dorsal Atlântica, Mutilator, Vulcano, and early Sepultura as primary influences. The band sings in Portuguese and released their self-titled debut full-length in 2019 on Bigorna Records, following a split with Harpago in 2015 and two earlier demos. Their 2021 single 'Sinfonia do Diabo' and subsequent album 'Antropocaos' show a band evolving within the classic Brazilian thrash framework.

Groove and thrash metal band from Brasília with horror-themed lyrics drawn from slasher films, zombies, and Lovecraftian mythology. Their sound draws from 1980s thrash metal and 1990s stoner and sludge, resulting in an eclectic heaviness reflected in releases such as "Grooves From the Grave: Mutants, Slashers, Zombies and Enraged Lovecraftian Deities." The band was active until their split-up and self-released their catalog on Bandcamp.

Apocrifo was a thrash metal band from Fortaleza, Brazil, whose lyrical focus centered on the great fallacies and contradictions of modern society. The band released the two-track demo "No Alvo" in 2014, delivering tightly wound, palm-muted thrash in the classic Brazilian tradition before splitting up.

Apofenia is an old-school death/thrash metal band from the city of San Luis, Argentina, formed in late 2015 and playing their first show in January 2016. The band released their debut demo "Peste" in July 2016, a five-track assault featuring tracks like "Descuartizado" and "Muerte" rooted in brutal, no-frills extreme metal. Driven largely by siblings Anabelle Escudero on drums and Gisselle Escudero on guitar and vocals, Apofenia became one of the more notable all-female extreme metal acts in Argentina's interior provinces.

Apokalyptic Raids is a black/death/thrash metal band from Rio de Janeiro, originally formed in 1998 as Apocalyptic Raids — a name drawn directly from a Hellhammer EP — before adopting the current spelling in 2001. Driven by guitarist and vocalist Leon "Necromaniac" Manssur, they have released a string of albums and splits since their debut "Only Death Is Real" (2001), channeling the proto-black metal ferocity of Hellhammer, Bathory, and Vulcano while collaborating with acts like Whipstriker and Atomic Roar.

Arcanjo is a Christian thrash metal band from Brasília, Distrito Federal, Brazil, with origins tracing back to 1994. The band's lyrical themes center on Christianity, perseverance, and redemption, and they released a split with Soul Factor in 2001 before a period of inactivity and subsequent reformation.

Ardid is a thrash metal band from the Florencio Varela area of Buenos Aires province, with a lineup including Marcelo Lopez on vocals and bass, Jorge "Costra" García on guitar, and Ricardo "Ricky" Rodriguez on drums. The band completed their album "Mundo en coma" in 2023, presenting it live at Zadar Club in Wilde. Their material draws on classic thrash influences while addressing themes rooted in the working-class neighborhoods of the southern Buenos Aires conurbano.

Arkhaikus was a thrash metal band from Presidente Prudente, São Paulo, Brazil, active from 2010 until their split-up and operating under several earlier names including Slackerness and Metaldier before settling on the final moniker. The band's lyrical themes centered on warfare, evil, and metal culture, fitting squarely within the aggressive thrash tradition of the Brazilian interior. They documented their live activity with a bootleg recording from a 2011 show in Santo Anastácio.

Arkillator is a thrash metal band from Quito, Ecuador, originally formed in 2017 under the name Nightmare before adopting their current identity. The two-piece outfit released their debut EP Miseria Social in January 2026, a five-track effort that delivers straightforward thrash in the tradition of the genre's classic era. They operate independently and perform live in the Quito metal scene.