Klaviyo change history: Klaviyo Service Disruption

A critical Klaviyo disruption affected klaviyo.com, APIs, message sending and event processing, potentially preventing logins and campaigns or flows. It started 2026-05-05 21:24 UTC and was resolved 2026-05-07 23:02 UTC (2 days 1 h). Services were restored by 2026-05-06 15:59 UTC; subsequent background recovery did not affect platform use.