Semper Acerbus is an American metalcore band from Texas formed on December 2016. The group consists of vocalist Nelson Acerbus , guitarists Jaime Vargas and Joe Dragich, bassist Sammy Farhat and drummer Aidan Oldnettle.

Semper Acerbus primarily plays heavy metal and metalcore combining sounds from extreme metal and hardcore. Like some modern metalcore bands, Semper Acerbus vocally combine singing, screaming vocals, and growls. Semper Acerbus music mixes solid punched riffs, double bass drum patterns, power chords, dual-guitar harmonies, often punctuated by guitar solos and breakdowns.

SA has been constantly playing big festivals, national and international level, also opening for national acts on tour and shows across the nation.