Brainshot was a thrash metal band from Antofagasta, Chile, formed in 2009 and now split up, who released a demo titled Ataque Zombie in 2011 featuring Spanish-language tracks. They were part of the underground metal scene in northern Chile before disbanding.

Brainstormy is a progressive and avant-garde thrash metal band from Taubaté, São Paulo, Brazil. The band blended complex, experimental arrangements with thrash aggression, setting them apart from the more straightforward São Paulo thrash scene. They have since split up and were signed to AWC Records during their active period.

Bravecore is a metalcore band from the São Paulo and Guarulhos area of Brazil, formed in 2021. Drawing influence from acts such as As I Lay Dying, Lamb of God, and Asking Alexandria, the band writes lyrics in both Portuguese and English covering motivational, introspective, and political themes. They released their debut EP "Devastação" in 2021 and have appeared at multiple editions of the Metalcore Fest in São Paulo.

Bravelord is the solo power metal project of Chilean musician Rodrigo Bravo, launched in 2021 with the debut single The Power From The End Of The World, produced by Nicolás Arce at AST Studios. The debut full-length album of the same name was released in November 2025 through AST Music, a conceptual record built around an environmental allegory featuring guest vocals from Caterina Nix of Chaos Magic and Paulo Domic, drawing from the classic late-1990s power metal sound.

Braves Face the Devil is a stoner metal band from Fortaleza, Ceará, Brazil, formed in 2015. The band later evolved and continued under the name Netuno Doom, shifting toward a progressive doom metal sound with science fiction-themed lyrics drawing on cosmic horror and cyberpunk influences. Both incarnations have been active parts of the northeastern Brazilian heavy music scene.

Break the Ice is a death/thrash metal band from São Paulo, Brazil, formed in 2013. The band released a demo tape in 2015 featuring tracks such as "Agony" and "Blessed Death," recorded and mixed by Ugo Héon. They have since split up.

Briga de Bar — Portuguese for "Bar Fight" — is a thrash metal band from Belém, Pará, Brazil. The band released their recording "Tropa Banger" in 2015 and remain active as an independent act. They are part of Belém's underground metal scene in the Amazon region of northern Brazil.

Briselas is a folk metal band from Temuco, Chile, formed in July 2004 following the dissolution of another Temuco act, with a lineup that incorporates violin, flute, and keyboards alongside electric guitars. Drawing on Celtic folk influences and Chilean and Mapuche mythology, they released ...más Allá del Sol in 2010 and the twelve-track album Tierra de Poetas through Pewmawe Producciones in 2019.

Brisä is a stoner doom metal band from Congonhas, Minas Gerais, Brazil, formed in 2013. The band has built a reputation in the Brazilian underground scene for professional production and well-crafted compositions, performing at events such as the Rising Metal Fest and the 16º Heavy Fest in Conselheiro Lafaiete. Their sound is characterized by heavy, energetic performances rooted in the stoner doom tradition.