ACI WORLDWIDE INC revenue for the last year amounted to 1.32 B EUR, the most of which — 621.44 M EUR — came from its highest performing source at the moment, Billers, the year earlier bringing 588.10 M EUR. The greatest contribution to the revenue figure was made by United States — last year it brought ACI WORLDWIDE INC 803.78 M EUR, and the year before that — 795.81 M EUR.