Juramento are a power metal band from Córdoba, Argentina, with a lineup that includes vocalist Adrian "Pirana" Gomez, guitarists Matias Villegas and Pablo Mancini, bassist Federico De Bernardi, and drummer Adolfo Diaz. The band released a demo presentation early in their career and have maintained an active presence in the Córdoba metal scene. They maintain an official website at juramentocba.com.ar.

Justabeli are a death/black metal band from Diadema, São Paulo, Brazil, active since 2001, whose early work was rooted in brutal death metal before incorporating increasingly aggressive black metal elements. Their debut album Hell War (2008) was released through Impaled Records and earned them spots alongside acts such as Rotting Christ and Vulcano; subsequent releases include Cause the War Never Ends (2015), Intense Heavy Clash (2019), and Screaming Triumph (2023).

Jäger Miliz is a thrash metal band from Puerto Montt, Chile, formed in 2016 by members Jorge Trujillo, Fabian Soto, Martin Trujillo, and Miguel Yáñez. Their debut release, Demo MMXXI (2021), recorded and mixed at Supra Producciones, includes two original tracks alongside covers of Venom's 'Welcome to Hell' and 'Black Metal.'

Kaatayra is the one-man atmospheric folk black metal project of Brasília-based musician Caio Lemos, launched in 2019. Lemos weaves traditional Brazilian folk instrumentation and regional mythology into raw black metal frameworks, drawing its name from a word meaning "Son or Daughter of The Woods." The project proved immediately prolific, releasing two full-lengths in its debut year — No Ruidar da Mata que Mirra and Nascido Sob o Signo Incivilizatório — and followed with further albums including Só Quem Viu o Relâmpago à Sua Direita Sabe (2020) and Inpariquipê (2021).

Kadabra is a heavy metal power trio from Vinhedo, São Paulo, Brazil, whose sound blends traditional heavy metal with Bay Area thrash influences and elements of Brazilian death metal. The band debuted with Devastation's Songs (2017) and followed with Remains of the Past (2019) before releasing Underground Resistance (2021), their first album recorded entirely in Portuguese.

Kadavro is a death/thrash metal band from Neuquén, Argentina, whose members perform under pseudonyms El Cadaver, G.G, Machacador, and Weedfinder. They released two records in 2021 — Evil Entities from the Hidden Past through Evil Damnations Records, and Paladar Negro — before following up with Procession of Evil in 2024.

Kaer Morhen is a melodic death metal band from Buenos Aires, Argentina, formed in 2017 by guitarists Andres and Adrian Ojeda alongside vocalist Christopher Amato, bassist Ariel Pirelli, and drummer Adrian Ojeda. They debuted with a self-titled EP in 2017 and followed with the three-track release Tales Deserve to Be Told in September 2018.

Kafziel is the solo instrumental progressive metal project of guitarist Pablo Cubilla from San Nicolás de los Arroyos, Argentina, who launched it in 2013. Cubilla, also a member of Rebhellion and Hatred Source, has maintained a prolific output across more than a dozen releases, including Defying Gravity (2015), Elements (2019), Ephemeral (2020), and Rewired (2024).

Kaiten is a thrash/death metal band from Valinhos, São Paulo, Brazil, formed in 2010. The band released the album Crash and Burn, operating as an unsigned independent act within the São Paulo underground metal scene.