Emerging from the vibrant Florida music scene, Underoath established itself as a defining force in post-hardcore, renowned for its intense sonic landscapes, dual vocal attack, and profound lyrical themes. Founded in 1997 in Ocala by vocalist Dallas Taylor and guitarist Luke Morton, the band would find its core identity after relocating to Tampa, solidifying around drummer and vocalist Aaron Gillespie, the group's last remaining original member. Their early work, including the albums Act of Depression, Cries of the Past, and The Changing of Times, was rooted in the Christian metalcore scene, building a dedicated underground following.

A pivotal shift occurred in 2003 with the departure of Taylor and the arrival of lead vocalist Spencer Chamberlain. This new lineup, which also included keyboardist Christopher Dudley, lead guitarist Timothy McTague, and bassist Grant Brandell, catalyzed the band's breakthrough. Their 2004 album, They're Only Chasing Safety, masterfully blended melodic hooks with raw aggression, becoming a landmark release that earned a gold certification from the RIAA and propelled Underoath to mainstream recognition within the rock world. They further cemented their status with 2006's critically acclaimed Define the Great Line, which debuted at number two on the Billboard 200 and also achieved gold status, showcasing a darker, more complex artistic evolution.

The band maintained its commercial and creative momentum with Lost in the Sound of Separation in 2008, but faced a significant change in 2010 when Gillespie departed. Former Norma Jean drummer Daniel Davison joined for the recording of Ø (Disambiguation), an album that featured more prominent singing from Chamberlain and McTague. Following this period, Underoath announced in 2012 that they would disband, playing a final series of shows in early 2013. Their hiatus proved temporary, however, as the band stunned fans by reuniting in 2015, with the key return of Gillespie to the fold.

This reunion ushered in a new, explicitly secular chapter for the group. Their 2018 comeback album, Erase Me, was their first release in eight years and openly distanced the band from its previous Christian label. They continued to explore this renewed creative freedom with Voyeurist in 2022. The band's current lineup, consisting of Gillespie, Chamberlain, Dudley, McTague, and Brandell, remains active, releasing their tenth studio album, The Place After This One, in March 2025, continuing a legacy of innovation and influence that has resonated with fans for nearly three decades.