Thrash and crossover metal band from Minas Gerais founded by Manu Joker, who had previously drummed for Sarcófago on the 1989 EP Rotting. Joker switched to vocals for Uganga's debut album Atitude Lótus (2002/2003) and led the band through a run of releases including Vol. 3: Caos Carma Conceito (2010), Opressor (2014), and Servus (2019), with the band completing two European tours across 14 countries.

Progressive metal band from Brazil featuring vocalist and guitarist Mauricio Bortoloto, bassist Pedro Ghoneim, and drummer Matheus Vazquez. Their debut album Memory was released in 2022 and includes eight tracks, among them the single Carnival, which adapts the Brazilian frevo rhythm into a heavy metal arrangement.

Uinyuvoro is a one-man atmospheric black metal project from Viña del Mar, Chile. The project released a prolific run of material in 2019, including the full-lengths Tenten Vilu - Cai cai Vilu and Space, drawing on Mapuche mythology as reflected in titles referencing the serpent deities Ten ten Vilu and Cai cai Vilu.

Ultimo Aliento is a stoner metal and rock trio from Berazategui, Argentina, consisting of Martín García (vocals and guitar), Maximiliano Alegre (bass and backing vocals), and Hernán Falcón (drums and backing vocals). The band has released original material including tracks such as Camino a la batalla and Doble filo through OíD!, the municipal recording initiative of Berazategui.

Thrash metal band from Osasco, São Paulo, formed in 2017. Their debut demo Entre Nas Trevas, released in April 2017, was recorded at No Limits Studio in São Paulo and produced by Ivi Kardec; its five tracks include Genocídio Radioativo and Executor.

Ultranza is a heavy metal trio from Balcarce, in the Buenos Aires province of Argentina. The band released their debut album Desde El Abra in February 2020, a nine-track record that drew comparisons to classic hard rock and thrash traditions and was recognized in year-end roundups of Argentine metal releases.

Solo project of Anna C. Chaos, operating from Mairiporã, São Paulo since 2007, working in atmospheric sludge, drone, and doom metal. She writes, records, mixes, and masters all material herself, with the debut release Entrails recorded in 2009 and a prolific output that reached the 11th full-length Filled by Empty Spaces in 2020 and the 13th album Mourning Carnivals From Now On in 2023 on Time to Kill Records. The albums Belong to Nothing (2018), Deserts of the Soul, Filled by Empty Spaces, and To Become Unreal (2021) form a connected sequence she titled the Tetralogy of Solitude.

Umbra Tenebrae are a Colombian atmospheric black metal band whose name translates to "Shadow of Darkness," formed in 2025. Their debut full-length Nocturnorum Visiorum, produced by Rex Aetherum, was released in January 2026 and contains six tracks exploring themes of darkness, wisdom, and consciousness.

Umzac are a symphonic gothic/folk metal band from Bogotá, Colombia, formed in 2010, whose name derives from the Chibcha language of the Muisca people and translates roughly to "darkness." Rooted in Muisca legends and mythology, their music incorporates traditional Colombian rhythms including Bambuco and Pasillo, and they released their debut EP Usqua Quyca | Hilando Historias in October 2017.