OPEN TEXT CORP. revenue for the last year amounted to 5.45 B EUR, the most of which — 2.51 B EUR — came from its highest performing source at the moment, Customer Support, the year earlier bringing 1.77 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought OPEN TEXT CORP. 2.80 B EUR, and the year before that — 2.34 B EUR.