Klaviyo, Inc. Series A revenue for the last year amounted to 698.10 M USD, the most of which — 698.10 M USD — came from its highest performing source at the moment, Software-as-a-Service, the year earlier bringing 472.75 M USD. The greatest contribution to the revenue figure was made by United States — last year it brought Klaviyo, Inc. Series A 443.47 M USD, and the year before that — 307.22 M USD.