Phronexis is a thrash metal band from La Paz, Bolivia, originally founded in 2017 as a one-man project by Alvin Phronexis before evolving into a full band. The name is a stylized take on the ancient Greek concept of phronesis — a form of practical wisdom or mindfulness — which informs the band's introspective lyrical direction alongside themes of disease, horror, and death. Signed to The Foul Swamp Productions, they have released two full-lengths, Pestiferous (2020) and Opulence of Metal (2024), establishing themselves as a consistent force in Bolivia's thrash underground.

Pigmachine were a short-lived São Paulo crossover thrash outfit whose members — Glauco on bass and vocals, Murillo Leite on guitar, and Fabio Moyses on drums — had previously played together in Apoleon. The band left behind a self-titled demo from late 1992, the "Nervum" split compilation with Apoleon in 1993, and the posthumously released "SP Punk / Studio Outtakes" in 1996.

Placenta was a female-fronted thrash metal quintet from Belo Horizonte active in the mid-1980s, making them one of the early all-women metal acts to emerge from the Brazilian underground. Their sole documented release is the 1987 rehearsal demo Madness in the Bus, a raw document that touched on themes from politics to Satanism, though an unofficial self-titled CD from 1992 is also known to exist.

Platinus is a Porto Alegre-based heavy and thrash metal band formed in 2012, drawing their sound from the classic 1980s thrash tradition. Their Demo Psicótica introduced tracks like "Destruindo a Farsa" and "Vida Psicótica," and the band went on to release the conceptual full-length Tensão, which the group has described as their most thematically ambitious work.

Platoon, also known as Platoon Thrash War, is a thrash metal band from Manaus with a militaristic lyrical focus on war, conflict, and destruction. Their 2019 album Máquina de Guerra, released through Bigorna Records, delivers eight tracks of old-school thrash aggression including the standout "Casualidades de Guerra," and the band has since appeared on compilations cementing their reputation in the Brazilian underground.

Formed in 2012 by Wilson (Evil Puke), Luan (slaughterrazor), and Alex Henrique Rangel, Poison Beer played aggressive old-school thrash drawing heavily from the German scene while weaving in crossover, black, and death metal influences. Their 2013 EP Poisoning the Priest laid out their provocative lyrical obsessions — alcohol, evil, and anti-religious sacrilege — over six short blasts of raw, unpolished thrash.

Poison the Preacher is a thrash metal, crossover, and hardcore punk band from Bogotá, Colombia, formed in 2021. The band blends raw hardcore aggression with old-school thrash principles and released their debut full-length "Vs the World" in 2025 through Concreto Records. Their catalog also includes several singles and a split release from 2022–2023.

Possuído pelo Cão (PxPxCx) is a crossover thrash supergroup assembled from members of VIOLATOR, D.F.C., and Terror Revolucionário, dedicated to reviving the circle-pit mayhem of 1980s hardcore-thrash hybrids. Their 2008 debut Possessed in the Circle Pit — just over twenty minutes of anti-religious sarcasm, Hardcore energy, and Thrash riffing — also features a cover of Attitude Adjustment's "Grey World" and remains a beloved slab of Brazilian underground crossover.

Predatory are a São Paulo thrash metal outfit whose material has been picked up by underground compilations including Suspiria de Profundis II and Violent Records' Endless Massacre IV, on which their track "Hated" appeared. Their sound is rooted in personal, gritty themes delivered through the hard-hitting thrash tradition of the Brazilian underground.