ACI Worldwide, Inc. engages in the development, marketing, installation, and support of software products and solutions primarily focused on facilitating real-time electronic payments. It operates through the following segments: Banks, Merchants, and Billers. The firm offers electronic bill presentment and payment services to consumer finance, insurance, healthcare, higher education, utility, government, telecommunications, and mortgage sectors, implementation services, including product installations and configurations, and custom software modifications. It markets its products under the ACI Worldwide brand. ACI Worldwide was founded in 1975 and is headquartered in Elkhorn, NE.