Keter is a death/thrash metal band from Salvador, Bahia, Brazil, featuring vocalist Bawdy, guitarists George Lessa and Yury Duplat, bassist Fagner Nascimento, and drummer Renato Corpse. The band released a self-titled demo in 2008 and the live EP Caçadores das Trevas in 2009, and was elected the best metal band in Bahia by readers of Whiplash in 2010. They also contributed a track to the Headhunter D.C. tribute compilation A Deathmetallic Brotherhood in Darkest Mourning for God (Mutilation Productions, 2016).

Kevin Douglas is a self-taught instrumental guitarist from Sergipe, Brazil, working primarily in a rock and metal context. His Bandcamp catalogue includes the albums Rotten Fingers, Outlandish, Skin Spots, and Miscellaneous, showcasing a versatile approach to progressive and instrumental metal. He also produces gear-review content on YouTube, writing original tracks to accompany each video.

Key of Salomon is a Brazilian black metal band whose discography includes the demos Summoning of the Night Spirits (1998) and Illecebrarum Infernalis (1999), both self-released. The band operated in the raw, underground tradition of Brazilian black metal and has since split up.

Khadabra is a psychedelic doom metal quartet from Buenos Aires, Argentina, formed in 2013, comprising Verónica on vocals, Gastón on guitar, Facundo on drums, and Miguel on bass. The band documented their early live sound on Ritual Secreto (Vivo), a full live recording from the Casa Rodante venue in Almagro captured in September 2013, followed by a self-titled EP in 2015 and a second live album drawn from a March 2018 Club V performance.

Khallice is a progressive metal band from Brasília, Brazil, founded in 1994 by guitarist Marcelo Barbosa, who later joined Angra and Almah. The band released their debut album The Journey in 2003 via Hellion Records, followed by a worldwide reissue through Magna Carta Records in 2007 and the EP Inside Your Head in 2008. In early 2008 they won a contest to open for Dream Theater at Citibank Hall in Rio de Janeiro, one of the most visible showcases for a Brazilian progressive metal act at the time.

Khannas is a southern/groove metal band from San Rafael, Mendoza, Argentina, whose debut release was the EP Lengua de Diablo, issued on January 31, 2016. The four-track EP — containing "Bordeando abismos," "Resiste el olvido," "Memorias latentes," and "Lengua de diablo" — was recorded, mixed, and mastered at Aire Records by Facundo Lucero, with all compositions written by Fernando Ferre.

Khaotic is a one-person black metal project from São Paulo, Brazil, created in 2012 by D. Profaner, who handles all instruments and vocals. The project's output is marked by dense atmospheres and raw, misanthropic black metal, with themes centred on human weakness, anti-Christianity, and death. The band released the demo Antichrist Propaganda in 2012, followed by the EP The Beauty of Death and the full-length debut Tenebrae (2013).

Khazad Dûm is a black/death metal duo from Uberlândia, Minas Gerais, Brazil, founded around 2014–2015 by Noatún (guitars, vocals) and Gothmog (bass), drawing their name and lyrical themes from Tolkien's Middle-earth mythology. The band released the EP Garmadh in 2017 before issuing their debut full-length Khásma (BloodRock Records, 2019), which blends old-school extreme metal aggression with NWOBHM and doom influences, acoustic passages, and piano. A remastered edition of Khásma was released through Masked Dead Records in 2023.

Khronic Infection is a Brazilian death metal band formed in 2018, active under the Bandcamp name Chronic Infection. The band released their debut material in 2018 and continued developing a blunt, aggressive death metal sound, culminating in the 2026 full-length Worldwide Metastasis, an eight-track record whose titles — including "Womb of Rot," "Putrefaction of Humanity," and "Priests of Hate" — reflect the band's uncompromising extremity.