A.R.I.D.A. is a groove metal and metalcore band from San Rafael, Mendoza, formed by vocalist and bassist Francisco Escudero, guitarists Tomas Villegas and Alejandro Martin, and drummer Mariana Gutierrez. The band released their debut album Sueño Demencial in May 2022, a five-track conceptual record produced with support from Argentina's INAMU arts funding program.

Alkimistal is a São Paulo-based metal act working the intersection of melodic death metal, thrash, and metalcore. Their Bandcamp release 'Reflections' showcases the blend of harsh riffing and melodic hooks that defines their sound within São Paulo's underground scene.

Antropos is a Brazilian groove metal and metalcore band formed in 2020, blending the heavy mid-tempo rhythms and chugging riffs of groove metal with the melodic structures and dynamic range characteristic of metalcore. Active within Brazil's contemporary underground scene, the band represents the country's ongoing absorption and reinterpretation of international heavy subgenres through a distinctly South American lens. They distribute their music independently through Bandcamp.

Asense is a progressive death metal and metalcore band from Santiago, Chile, formed in 2009, whose discography spans three albums: "The Cold Nightmares of Belphegor: Tempest in Seven Regions" (2009), "Cellarius" (2014), and "tō kyō - o da i ba" (2018). Their lyrics address sociopolitical themes and complex philosophical ideas, and all three records are available independently on Bandcamp.

Atria was a thrash metal and metalcore band from Maricá, Rio de Janeiro state, formed in 2020 and short-lived. Blending the riff aggression of thrash with metalcore's structured heaviness, the band were part of the broader metal underground in the greater Rio de Janeiro region before disbanding.

Aversus formed in 2012 in Centenario, Neuquén, blending metalcore aggression with thrash metal riffing in a corner of Patagonia that has produced only a handful of extreme acts. The band is signed to Marfus' Records, a Neuquén-based label dedicated to thrash, death, and metalcore from the region.

Away from the Sun is a modern metalcore band from Curitiba, Paraná, Brazil, formed in 2020. Blending melodic death metal with contemporary metalcore, the band weaves themes of psychoanalytic archetypes, philosophy, and misanthropy throughout their releases, including the albums Unity and Anima. Their sound draws on the melodic Gothenburg tradition while incorporating the rhythmic aggression of modern metalcore.

AXTY is a metalcore and nu-metalcore band from São Paulo, Brazil, formed in 2016 by vocalist Felipe Hervoso as a solo project originally named Anxiety, later expanding into a full quartet with guitarist Felipi Grivol, bassist Jonathas Peschiera, and drummer Gabriel Vacari. Their music draws on contemporary metalcore acts such as Architects and Bring Me the Horizon, incorporating electronic elements and alternating between harsh screams and clean vocals. Their 2024 album Hannya spans nu-metalcore, post-hardcore, and electronic territory, with lyrics centered on mental health and personal resilience.