Kaddish is a post-hardcore band from Philadelphia, Pennsylvania. Formed in 2003, the band has released four full-length albums, including their self-titled debut in 2005 and "Thick Letters to Friends" in 2019. Kaddish's music is characterized by its intense and emotional lyrics, which often explore themes of loss, grief, and redemption. The band's sound is a mix of hardcore punk, post-rock, and noise, and they have been praised for their originality and their ability to create music that is both cathartic and challenging.