Ajeno is an instrumental sludge and groove metal band from Buenos Aires, Argentina, known for heavy, riff-driven compositions without vocals. The band released their self-titled EP followed by Justificando el Kaos in November 2024, a three-track record recorded at Estudios Inclan and La Ochava Records. Both releases showcase a dense, slow-burning approach rooted in the heavier end of sludge and post-metal.

Antiklan is a post-doom and sludge metal trio from Natal, Rio Grande do Norte, Brazil, formed in 2022. The band — vocalist Julia Gusso, guitarist and bassist Flávio França, and drummer Max Barros — released their debut album 'Under Wetiko (Hymns from beneath the Veil)' in 2022, a five-track record recorded at Studio Black Hole in Natal and mixed in São Paulo. Their heavy, socially charged sound blends sludge and doom with an explicitly DIY, anti-authoritarian ethos, earning comparisons to punk-infused sludge.

Arabesco is a solo project from São Paulo, Brazil, formed in 2015 by multi-instrumentalist André Oliveira. The project blends acoustic elements with sludge and doom metal, creating a sparse and heavy sound rooted in the São Paulo underground scene.

Aroma de Saturno is a doom, sludge, and stoner metal band from Blumenau, Santa Catarina, Brazil, formed in 2018. They occupy the slower, heavier end of the Brazilian metal underground, releasing their self-titled EP and the track Ponto Sem Retorno through Bandcamp. Blumenau's German-immigrant heritage and industrial past give the city an unusual cultural backdrop for the kind of heavy, atmospheric metal Aroma de Saturno pursues.

Asilo was a Buenos Aires sludge, drone, and doom metal collective that built a catalog of slow, crushing releases across the 2010s, including the split with Neh Czneg (2013), Comunión (2014), and Desintegración (2019). Their approach leaned toward extended, corrosive compositions that placed them firmly within the heavier end of Argentina's underground doom scene.