Boom! Studios is an American comic book and graphic novel publisher, headquartered in Los Angeles, California, United States.

Boom!'s first publication was Zombie Tales #1, a horror zombie anthology, released under the Boom! and Atomeka Press logos on June 29, 2005. The issue was originally solicited by Atomeka but released after Richie had left the company to start Boom! Studios. Giffen and DeMatteis imported their Hero Squared series from Atomeka to Boom! and Hero Squared became the very first Boom! comic book solicited solely under the Boom! logo, shipping July 27, 2005.

During this time in its history, Boom! focused on publishing an array of original series created by a slew of industry veterans: Giffen worked on Hero Squared, Planetary Brigade, 10, Jeremiah Harm, and the Tales titles like Zombie Tales and Cthulhu Tales. DeMatteis collaborated with Giffen on Hero Squared and Planetary Brigade and brought his own series, The Stardust Kid, with Mike Ploog, over from Image Comics. Mike Mignola and Troy Nixey's Oni Press series Jenny Finn migrated to Boom! and finally completed its story. Eisner Award winner Dave Johnson created covers for Zombie Tales and Cthulhu Tales. Joe Casey created The Black Plague while Rafael Albuquerque's first American work debuted in The Savage Brothers.

At the 2007 San Diego Comic-Con, Boom! announced plans to launch its first imprint, a new line of comics for children originally announced with the name Zoom!, but when the imprint launched in 2009, the imprint debuted as "Boom Kids!". Boom! also signed a deal with Pixar to produce comic books based on their properties and secured newsstand distribution. The first included The Muppet Show by Roger Langridge and The Incredibles: Family Matters by Mark Waid and artist Marcio Takara. In February 2011, Boom! re-branded Boom! Kids as KaBoom!, re-focusing the imprint to be appealing to all ages rather than only children.