Bad Taste is a death/thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2017. They operate out of the South Brazilian underground, a region with a strong tradition of extreme metal, playing aggressive thrash rooted in the death metal aesthetic. The band remains active as an independent act.

Bagronk is a death/black metal band from the southern suburbs of Greater Buenos Aires, Argentina, with roots going back to an early 2000s formation. The band recorded the demo "Death and Blood Valley" and has built a persistent presence in the Argentine underground extreme metal scene across multiple active periods.

Barbed Wire were a death/thrash metal band from Brasília, the Brazilian capital, operating in the underground during the mid-2010s before splitting up. Brasília has a smaller but dedicated extreme metal community, and Barbed Wire delivered the raw, aggressive blend of death and thrash that the band's name implies, in the tradition of the brutal early Brazilian extreme metal scene.

Beelzeebuth was a death/black metal band from São Paulo, Brazil, that formed and dissolved within the 2020s as an unsigned underground act. Distinct from the similarly-named Beelzeebubth from Salvador, this São Paulo project operated in the raw, extreme end of Brazilian death-black metal — a tradition with deep roots in the city's prolific underground scene — before splitting up after a brief run.

Bewitchment is a one-man death/thrash metal project from Rio Grande da Serra, São Paulo, Brazil, helmed by Rodrigo "Infectz" Costa. The project draws heavily on old-school death metal influences, particularly the early works of Death and Pestilence's "Malleus Maleficarum" era, blending those sounds with thrash aggression. The project released the full-length "Oblivion Shall Reign" (2019) in a limited pressing of 500 copies through multiple Brazilian underground labels including Rapture Records and Extreme Sounds Records.

BlackForce is a death/thrash metal band from Niterói, Rio de Janeiro, Brazil. The band is signed to Profane Records and addresses themes including politics, religion, and the environment in their music.

Blasphemer is a death/thrash metal band from Santo André, São Paulo, Brazil, with roots in the local extreme metal underground. The band appeared on the "Headthrashers Live" compilation recorded at the Municipal Theatre in Santo André alongside Necromancia, MX, and Cova, documenting the early São Paulo thrash scene. Their lyrical themes centered on satanism, evil, war, and death.

Blowpipe is a death/thrash metal band from Campinas, São Paulo, Brazil. The band draws direct influence from the major thrash metal acts of the 1980s and death metal bands of the 1990s, and released a self-titled album in September 2020 through their own Blowpipe Records imprint. Their lineup includes Jean Quiles on vocals, Gedeon Alves on guitar, Edynho Baiochi on bass, and Johnny Hoglan on drums.

Bode Maldito is a one-man black/death/thrash metal project from Rio Grande do Sul, Brazil, operating within the Brazilian underground extreme metal scene. The project released the demo "Sodomizing Christ" digitally in 2024, with a limited physical edition of 33 copies issued in late 2024 by Poland's Unpure Records as part of their DIY Ungodly Underground Series. Lyrical themes revolve around Satanism and anti-Christianity.