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.

Brutal Death was a death/thrash metal band formed in 2011 in Rio Branco, Acre, Brazil. The band operated in the underground extreme metal scene of the Amazon region before disbanding.

Brutal War is a death/thrash metal band from Santa Maria da Vitória, Bahia, Brazil, formed in 2006. The band incorporates Christian and apocalyptic themes into their music and have released albums including "Hell is Real", "Revelation 666", "Warmageddon", and "Rage of Destruction".

Bruthus is a crossover thrash/heavy metal band formed around 2017–2018 in Nova Friburgo, Rio de Janeiro state, Brazil. Influenced by 1980s and 90s metal and rock, the band sings in Portuguese and has released the EP "O Sacode" (2018) and the full-length "Comigo Não" (2019), sharing stages with acts such as Noturnall and Edu Falaschi.

Bruto is a thrash metal band from Gama, a satellite city of Brasília, Brazil, with roots going back to the mid-2000s. The band performs in Portuguese and blends thrash metal aggression with rock and roll energy, releasing the album "Mundo Destruído" and becoming the first metal band to win the Gama Popular Music Festival (FMPG).