ACI Worldwide, Inc. develops, markets, installs, and supports software products and services for facilitating electronic payments in the United States and internationally. It operates through Banks, Merchants, and Billers segments. The company offers ACI Acquiring, a solution to process credit, debit, and prepaid card transactions, deliver digital innovation, enhance fraud prevention, and reduce interchange fees; ACI Issuing, a digital payment issuing solution; and ACI Enterprise Payments Platform to provide payment players payment processing and orchestration for digital payments.