Quark, Inc. is a privately-owned software company best known for QuarkXPress. Quark's attempts to diversify into other related areas have so far failed (multimedia development, photo/image editing).

Quark was founded by Tim Gill (President) and Fred Ebrahimi (CEO). Following Gill's retirement from the company, Ebrahimi took on both leadership roles. Unfortunately for Quark's public relations, Ebrahimi has been known to say some highly inflammatory things, such as "All customers are liars, thieves and bastards."

For much of its history, Quark had a history of doing relatively infrequent new versions, and pricing them at a high level. This, combined with public perception of CEO Ebrahimi's attitude towards their customers, has resulted in a strong negative feeling among many of Quark's customers, which seems to be enhancing competitor Adobe Systems' ability to woo people to try their competing software, Adobe InDesign.