Krytik is a death metal band from Minas Gerais, Brazil, formed in 2020. Their debut album Mutilated was released in June 2020, establishing their place in the state's active underground extreme metal scene.

Ktharsys is a heavy/power metal band from Caracas, Venezuela, founded by guitarist Martha Yánez. The band released their debut full-length, "Tras las huellas," in 2019 — an 11-track album recorded at OMG Productions that explores themes of emotional struggle and introspection, available as a free download on Bandcamp. The project draws on classic heavy metal foundations while maintaining an independent, self-produced ethos within the Venezuelan metal scene.

Kuarup is a Brazilian sludge/doom metal trio formed in 2025 by current and former members of Nekkrofuneral, A Peste, and Omfalos — José Antônio Dai Hou (bass/vocals), Fabrício Cardoso (guitars), and Vinicius Rispoli (guitars). Their debut EP, A Dor é o Combustível da Mudança, was released on March 21, 2025, blending heavy sludge riffs with melodic lead passages and lyrics in Portuguese addressing colonialism, fascism, and late capitalism.

Kubark is a grindcore band from Valparaíso, Chile, whose name is borrowed from the CIA's classified 1963 counterintelligence interrogation manual — a reference that resonates sharply given Chile's history of US-backed state violence. Their 2015 full-length Exterminados Como Ratas and 2019 EP Desintegración Interior deliver short, abrasive tracks addressing state repression, police brutality, and social collapse, and they have appeared on a Latin American grindcore split alongside bands from Peru, Colombia, and Argentina.

Kuld is a raw black metal band from Rio de Janeiro, Brazil, active since 2015. Their full-length Beyond The Black Spell, released on April 12, 2015, spans nine tracks of stripped-back, lo-fi black metal and remains available on Bandcamp.

Kuldefølels is a two-piece black metal band from La Plata, Argentina, formed in 2017 by Marcs Hegal (guitar, vocals) and Leo Asaru (drums, backing vocals). The duo released a self-titled recording in March 2017, followed by the live album "Diagonal Oscura" (September 2018) and the studio recording "La Casa de las Mentiras" (September 2019). Their Bandcamp catalog also includes cover recordings of Burzum and Darkthrone tracks.

Kultist is a black/thrash metal band from São Paulo, Brazil, formed in 2014 and known for their conceptual approach rooted in the cosmic horror fiction of H.P. Lovecraft. Their 2019 debut album The Black Goat — featuring vocalist Dan Pacheco alongside a rhythm section of Yasmin Amaral (guitar), Karine Campanille (bass), and Letícia Figueiredo (drums) — weaves each of its eight tracks around a specific Lovecraftian entity.

Kurcuma is a thrash and groove metal band from Don Bosco, Buenos Aires, formed in 2021. They released two demos in their debut year — "Ojos Rojos" and "Las Puertas" — and followed up with a self-titled EP in August 2022 available on Bandcamp. The band operates as an independent act rooted in the Buenos Aires underground metal scene.

Kybalion is a heavy metal band from Lanús, Buenos Aires, built around brothers Leonardo Fracchia (vocals/guitar) and Maximiliano Fracchia (drums), alongside guitarist Aldo Leipus and bassist Diego Moreno. The band released the full-length album "Hacete cargo" in 2004 on Del Imaginario Discos, and issued a live recording, "Live Sessions," in May 2024 through Black Metal Musicians Productions.