Alesana's overall genre is difficult to determine due to their frequent use of light and poppy influence combined with heavy outputs and metal influenced-screaming vocals. The band has been labeled under many genres like post-hardcore,screamo,^[] melodic metalcore^[ and emoAlthough these are the genres that Alesana is usually classified as, the band has labeled themselves as pop-metal,and "sweetcore" (a term that was made-up by the group that parodies the cliché of genres that suffix in "core").^[45] Their clean vocals and lyrics are described as appealing to emo and pop punk fans and their screams and heavy riffs are described as appealing to metal and hardcore punk fans.^[46]

Influences for the band include an array of rock bands such as The Beatles, Sonic Youth and Mew.^[47][48] The band is also influenced by an array of metal bands such as The Black Dahlia Murder and Iron Maiden.