Exscidium is a thrash metal band from Bahía Blanca, Argentina, with a lineup that includes vocalist and guitarist Carlos Orlando and guitarist Nicolas Amestoy. The band released the full-length América Rapiña in 2015 and the EP Genealogía Del Miedo in 2021, the latter featuring tracks such as "Aporías" and "Gusanos". They also appeared on the Thrash S.A. compilation series, which documented the Argentine thrash underground.

Exsecratio is a melodic black metal band from Brasília, Distrito Federal, Brazil. The band released their debut album "Veins of Perception" in December 2023, a seven-track record exploring themes of hooliganism, philosophy, and misanthropy.

Exsim were a grindcore/sludge/thrash metal band from Recife, Pernambuco, formed in 2020 and now split-up. Their self-titled debut album, released in May 2020, crams 18 tracks into roughly 16 minutes and was recorded, mixed, and mastered entirely in a home studio by Daniel Farias. Lyrically the record tackles alienation, fear of fascism, and the precariousness of Brazilian working life.

Exterminio is a death metal band from San Martín, Buenos Aires, with roots stretching back to 1989, making them one of Argentina's earliest death metal acts alongside Vibrion and Escabios. Founding vocalist Fernando Grippo has remained a constant presence across the band's history, which spans the early cassette era through full-lengths including Epitaph (1994), Homicide in First Degree (2007, via Hurling Metal Records), Inhuman Atrocities (2012, via Icarus Music), and Narcorporations (2017). The current lineup also features guitarists Carlos Varela and Alejandro Bustamante, bassist Richard Farias, and drummer Juan Calvete.

Extinction Remains are a death/doom metal band from Brasília, Distrito Federal, formed in 2013. Their discography spans four releases — Ecologic Noise (2013), Genetics of Defeat (2015), Human Disaster Never Ending (2017), and the 2019 compilation Smog, which was pressed to 500 copies by Polish labels Defense Records and Mythrone Promotion. Themes of ecological collapse, misanthropy, and industrial death run throughout their catalog.

Extipicium is a one-man black metal project from La Falda, in the Sierras de Córdoba, created and handled entirely by Bacilo the Koch, who plays guitars, bass, and handles all vocals and production. The project's debut album, Through Ancient Rites to the Finest Architecture of Extinction, was released in November 2020 and features guest vocal contributions from Javier Blasfemor across most of its ten tracks. A second album, III: PULVIS.CINIS.NIHIL, followed in January 2022, with all releases self-managed under a DIY ethos.

Extirpado is a black/death metal power duo from Mexico City, Mexico, formed in 2014 by guitarist/vocalist León Dávalos and drummer Eduardo Salazar. The band plays a brutal, fast-paced hybrid of black and death metal, and released their debut EP Bestia in 2018.

Extração Craniana are a goregrind band from Campo Grande, Mato Grosso do Sul, founded in 2010 by guitarist Matheus Mattos and bassist/vocalist Gabriel Zamian, with drummer Alyson Matheus completing the lineup in 2012. The band released their debut full-length Mutilação Extrema in November 2012, channeling surgical gore aesthetics as a vehicle for anti-religious and anti-moralistic themes. They have been on hold since around 2012 but maintain an active Bandcamp archive.

Extremauncion is a groove and thrash metal band from Clorinda, in the northern Argentine province of Formosa, a region with a small but active metal scene anchored by events such as the Clorinda Rock Metal Fest. The band's recorded output includes the demo Corre o muere, documented in the Encyclopaedia Metallum, and further releases catalogued on Discogs. Their city of origin, Clorinda, sits on the Paraguayan border, giving the band one of the more geographically remote bases in the Argentine metal underground.