Incrust is a death metal band from Salvador, Bahia, Brazil, featuring Moisés SG Grinder on vocals and bass, Guilherme Saldanha on guitar, and Mateus Oliveira on drums. Their debut album Baptized in Unholy Gore (2005) — a compilation of their 2001 and 2003 demos — was released on Ibex Moon Records after the band was discovered by Incantation's John McEntee, with mastering handled by Roger Beaujard of Mortician at Primitive Recordings Studio.

Inculpatory was a death metal band from Concepción, Chile, whose lineup included vocalist Gonzalo Novoa, guitarist Camilo Bustos, drummer Gabriel Jara, and bassist Francisco Nocetti. The band released their debut EP Instinto Asesino in March 2014, a three-track recording featuring Spanish-language tracks with horror and extreme metal themes.

Incurse is a death/groove metal band from Varginha, Minas Gerais, Brazil, formed in 2017. The band blends death, groove, progressive, and heavy metal influences, releasing the single "Tormented Scars" in May 2019 as a preview of their debut album Constant Violence.

Indiscipline is an all-female heavy metal power trio from Rio de Janeiro, formed in 2014. The band released their debut EP "In My Guts" in 2014, followed by the full-length "Sanguinea" through Shinigami Records in April 2017, and the three-song digital EP "Psalms of Darkness" in 2019. Their lineup features Alice D'Moura on vocals and bass and Maria Fernanda Cals on guitar.

Indisposed was an all-female thrash metal quartet from La Plata, Argentina, formed in 2013, with members Pely Macchi on vocals, Anahí Fernandez on guitar, Salo Astudillo on bass, and Laura on drums. The band released two EPs, "Hangover" (2015) and the self-titled "Indisposed" (2017), both rooted in classic 1980s thrash with high-energy tempos and sharp twin guitars.

Indominus is a heavy metal band from Salvador, Bahia, Brazil, formed around 2015–2016. The band released the EP "Theater of War" in 2017, marking their entry into the Salvador metal underground scene.

Indoraza is a heavy/folk metal band from Huancayo, Peru, formed in 1998 with a mission of celebrating Andean culture and indigenous heritage through their music. Their name fuses the words for "indigenous" and "race," reflecting their commitment to honoring the pre-Columbian worldview of their ancestors. Their catalog spans multiple EPs and culminates in the 2025 full-length "Ayahuasca."

Induce Terror is a brutal death metal band from Bogotá, Colombia, formed in 2019. The band released the EP New World Order in 2020, expanding on two earlier singles from the same year.

Industrial Noise is a grindcore and death metal act from Presidente Prudente, São Paulo, Brazil, with roots going back to 1994 and activity continuing through several periods into the present era. The band appeared on the No Fashion HC Records compilation "O Progresso da Regressão" (2000) with the track "Padrões de Cultura," and has released material through Cianeto Discos.