Daniel Keith Swain (born August 18, 1983), known mononymously as Danny!, is an American rapper, record producer, singer, and composer.

Swain rose to prominence after his debut performance on Late Night with Jimmy Fallon, where he premiered his song "Evil". After joining Okayplayer Records, Danny! released his album Payback, cited by AllMusic as one of the best hip-hop releases of the year. In 2013, Ebony magazine listed Swain among other rising artists in its "Leaders of the New School" piece, calling Swain one of a handful of "innovators".

Swain has composed background music that has since been placed in numerous motion pictures and television programs, most notably FOX's animated series Bob's Burgers for which Swain was awarded an Emmy plaque for his contributions to an episode that won in the Outstanding Animated Program category at the 69th Primetime Emmy Awards in 2017.