Borroza are a death/thrash metal band from Bucaramanga, Santander, Colombia, formed in 2000 and signed to the Colombian label Upzurdo. They released their debut full-length Fantasma in 2008—recorded and mixed at Upzurdo Records in Bucaramanga and mastered in Hollywood—and have contributed tracks to several Colombian metal compilations including Al Filo de Metal Vol. V.

Boske are a Buenos Aires raw black metal project who have maintained a prolific output since 2021, releasing "Meditacion y muerte" and "Una leccion de Metal Negro" that year, followed by "Perseverancia y disciplina" in 2022 and "A punta de espada" in 2024. Their recordings lean hard into lo-fi production, visceral intensity, and an uncompromising fidelity to black metal's most primitive aesthetic. The band operates independently and remains active.

Boto não é Golfinho was a death metal and grindcore band from Londrina, Paraná, Brazil, active until their 2022 split-up. The band played fast, abrasive extreme metal in the noisecore tradition, releasing the album "Parlamentáveis" in March 2022, a nine-track record with a combined runtime of just over ten minutes.

Braincrusher is a crossover thrash band from Rio Claro, São Paulo, Brazil, formed in 2015. The band recorded their debut release "Mosh Crush Your Brain" live at the Válvula 9 studio in Rio Claro in August 2015, blending hardcore punk energy with thrash metal riffs, and followed it with the EP "Pátria Falida" in 2017 before going on hold.

Brainscanner is an industrial sludge metal project from São Paulo, Brazil, formed in 2016 by Ricardo Siqueira and Alexandre Dantas, known for slow, heavy, and mechanistic riff-driven compositions. The duo has been highly prolific, releasing a string of albums including "Trilobita" (2016), "Phoneutria" (2018), "Secret Transmissions" (2020), "Moebius" (2021), and "Slow Evolution" (2023), the latter recorded over three years in home studios.

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.

Brainwash is a thrash metal band from São Paulo, Brazil, formed in 2011. The band released the album "Time to Act" in 2013, a 12-track record rooted in the classic thrash metal style. They have since split up.

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.