Technical death metal band from Aracaju, Sergipe, named after Irineu Evangelista de Souza, the Baron of Mauá, the 19th-century industrialist who tried to modernize Brazil against government resistance. The band blends precision death metal with progressive and harmonic sensibilities, drawing influences from across the extreme spectrum from Napalm Death to Radiohead, and released the EP Conscience as an early showcase of their refined, worked-out approach. They have shared stages with established Brazilian acts including Torture Squad.

Acrimonious is a technical death metal band from Concepción, Chile, with roots going back to 1991 under the name Crematory before adopting their current name in 1992. The band released the full-length "Crisis de Odio" in 2005 and the EP "Infierno Terrenal" in 2017, both recorded in Concepción, along with the demo compilation "Unburied Past" in 2020. Their current lineup features Mauricio Cea on vocals, Jorge Matus and Danilo Garcia on guitars, Raúl Seguel on bass, and Patricio Lepe on drums.

Aeuphoria is a technical death metal band from Del Viso, Buenos Aires, Argentina, whose five-piece lineup — featuring Gustavo Alvarez Vivar on vocals, Damian Guardo and Nahuel Gannon on guitars, Franco Fuentes on bass, and Andres Fernandez on drums — came together in 2015 and released their debut album Æthernal Velum in 2016. The record blends the clinical precision of technical death metal with atmospheric and black metal textures, drawing comparisons to both Cascadian and Scandinavian approaches to extreme music. Æthernal Velum was recorded and produced by Alejandro Olmedo and earned the band attention from international metal publications for its ambitious scope.

Ayin was a technical death metal band from Campo Grande, Mato Grosso do Sul, Brazil. The project was conceived by guitarist/vocalist Abner Ramires in 2003 and realized as a full band in 2010 with the addition of bassist Tiago Romeo and drummer Leonardo Treuherz. Ayin wove themes of chaos, conspiracy, and Thelema through dense, technically demanding compositions, releasing the album "Ordo ab Chao" on Brutal Records before eventually disbanding.

Bestial Perception is a brutal and technical death metal band from La Plata, Argentina, featuring vocalist Necroseba and guitarist Martin Furkaz. The band released their debut album Pareidolik in December 2023 through Artes Negras Productions, with the album's title drawn from the psychological concept of pareidolia — the tendency to perceive meaningful shapes in random surfaces. Their sound centers on themes of catastrophe, sickness, and destruction.

Bloody Violence is a technical death metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed around 2013–2014. The band released their debut EP "Obliterate" in February 2014, a three-track release recorded at Studio Hurricane and produced by Sebastian Carsin, establishing them as part of the growing Porto Alegre extreme metal scene.

Burn the Mankind is a technical death metal and grindcore band from Porto Alegre, Rio Grande do Sul, Brazil, founded by guitarist Marcos Moura, a former member of Brazilian death metal act Nephasth. The band released their debut album "To Beyond" in 2015 and followed it with the conceptual EP "Chaos Matter" in 2020 via Cianeto Discos, the latter built around the four phases of human alchemy. Their current lineup includes members with ties to several prominent Brazilian extreme metal bands.

Catacomb was a technical death metal band from Buenos Aires, Argentina, whose lineup included guitarist and vocalist Maximiliano Rodriguez, guitarist Joel Poggi, bassist and vocalist Nicolas Becker, and drummer Martin Marques. The band released their debut EP, Unavoidable Internal Process, in July 2019, followed by two further releases in 2023: Where the Numbers End and Paradigm Shift. Their sound paired dense technical riffing with electronic touches and occasional clean vocals, setting them apart from more conventional tech-death acts in the South American underground.

Daedius is a progressive technical death metal band from La Ligua, in Chile's Valparaíso region, formed by a lineup including guitarists Francisco Lara and Jorge Salinas alongside vocalist Matias Espinoza. Their debut album 'Of Chaos and Resurgence', released in September 2018, presents seven tracks mixed and mastered by Darío Llancamán at Llancamaiden Studios.