Bonebeast is a death/thrash metal band from Presidente Dutra in the central region of the state of Maranhão, Brazil, formed in late 2014. The band began as a duo with Matheus Coelho on vocals and guitars and Ely Araújo on bass, releasing early demos between 2015 and 2016. They completed their lineup with drummer Gabriel Matos in 2018 and recorded their debut EP 'From the Ashes to the Chaos' at Headcrusher Studio in São Luís, releasing it in 2019.

Bonecrusher is a thrash metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2019. Operating out of a city long associated with Brazil's extreme metal tradition, the band plays aggressive thrash metal and is active within the Belo Horizonte underground scene.

BoneStripper was a thrash metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2014. The band released the EP 'A View of Heaven from a Seat in Hell' in January 2014 and was active within the Belo Horizonte metal scene before eventually splitting up.

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.

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.

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.

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.

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.