Klaviyo, Inc. Series A revenue for the last year amounted to 937.46 M USD, the most of which — 937.46 M USD — came from its highest performing source at the moment, Software-as-a-Service, the year earlier bringing 698.10 M USD. The greatest contribution to the revenue figure was made by United States — last year it brought Klaviyo, Inc. Series A 584.84 M USD, and the year before that — 443.47 M USD.