Lyria is a symphonic alternative metal band from Rio de Janeiro, Brazil, founded in 2012 by mezzo-soprano and songwriter Aline Happ. The band released their debut album "Catharsis" in 2014 and followed it with "Immersion" in 2018, both funded through crowdfunding campaigns that raised over $8,000 and $13,000 respectively from fans worldwide. Lyria won the Palco MP3 award for most-accessed heavy metal artist in both 2016 and 2017, and their songwriting frequently addresses themes of mental health, autism, and neurodiversity.

Magna Umbra was a symphonic metal band from Blumenau, Santa Catarina, Brazil, active from 2009 until disbanding in 2017. The band released the full-length album Someone at Your Door in 2015, a ten-track record showcasing their orchestral and melodic approach to heavy metal.

Mandoble is a Buenos Aires symphonic metal band built around vocalist Melitza Torres, violinist and vocalist Lucas Silva Sapia, guitarist Sherman Guala Janke, bassist Bastian Van Campos, and drummer Kevinn, known for elaborate theatrical stage productions incorporating actors, costumes, and video. The band released their debut EP The Gears Start to Move on March 29, 2019 — a six-track record produced, mixed, and mastered by Lucas Pereyra at Akiramenai Studio.

Mitsein is a symphonic metal outfit from Brasília built around the guitar work of Jeff Oliveira and the vocals of Cristienne Graciano. The band draws broadly from power, progressive, and melodic metal and has released singles and EPs since 2020, including a contribution to the Motim Underground compilation with the track "Revenge" in 2021.

Mulmeyun is a Santiago-based extreme metal project blending symphonic, black, and gothic doom elements, with the project's first release, the two-track EP A Tale of Love, appearing in September 2018. The band uses a Vocaloid voice bank as vocalist, an unusual choice within the Chilean metal underground, and has released a steady stream of material including Struggle (2020) and An Ancient Calling (2021). Thematically, the project frames suffering and sacrifice as necessary responses to modern nihilism and existential despair.

Founded by multi-instrumentalist Higor Hoenig, Neverwinter pairs his layered orchestral production with the expressive soprano vocals of Fernanda Zys, whose lyrics draw from 19th century literature and explore themes of fear and pain. Their 2019 debut Air Castle blends symphonic and power metal grandeur with gothic undertones drawn from bands like The Cure and HIM, resulting in a sound that sits at an unusual crossroads between darkness and melodic accessibility. The band produces everything independently out of their home studio in Paraná.

No One Spoke wove together distorted guitars, live violin, and the lyrical voice of Serbian-Brazilian vocalist Jelena Dobric into a style that deliberately avoided the operatic clichés common to female-fronted symphonic metal, drawing instead on classical and Latin influences. Their sole full-length "Nine Mirrors" (2021) spans nine tracks across forty-seven minutes and includes a guest appearance by bassist Rudy Sarzo on a cover of Ronnie James Dio's "Rainbow in the Dark."

NouseyesuoN fuses heavy metal with orchestral classical arrangements, structuring their 2020 album Death Is Nothing To Us as a suite of nine movements — each track numbered as an Opus — covering ground from Epicurean philosophy to Mayan mythology and medieval death imagery. The band's lyrical scope is unusually literary, drawing on poetry, nihilism, and esoteric history to give the music an almost academic density.

Nova Darkness is a Chilean melodic death metal band that released their debut album Of Doom and Grief in November 2019, a ten-track record incorporating neo-classical and symphonic elements alongside death metal riffing. The band followed it with Nigredo Tenebrae in January 2024, continuing to develop a sound influenced by the melodic death metal tradition of the 1990s.