Five9 Inc. revenue for the last year amounted to 824.91 M EUR, the most of which — 824.91 M EUR — came from its highest performing source at the moment, Cloud Software, the year earlier bringing 727.72 M EUR. The greatest contribution to the revenue figure was made by United States — last year it brought Five9 Inc. 736.32 M EUR, and the year before that — 656.11 M EUR.