Klaviyo: Sending delays for event-triggered flows
Klaviyo's status page listed this on 15 Sept 2026. Lasted 4.4 h, filed against Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending and Processing. This is their record, not a measurement of ours.
What happened
Started
Resolved
Lasted4.4 h
What failedEmail Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending and Processing
Their impactMinor
Regions: their page does not say which. Ours checks from three cities, and the screen we saw is on our own incident pages, where there is one.
What Klaviyo said
On their page: Sending delays for event-triggered flows
Klaviyo's status page: “We have identified the cause of the delays affecting event-triggered flows. Affected flows may see delays of approximately 2 hours. Our team is now working on a fix to restore processing back to normal speed. We are working to resolve this as quickly as possible and will share another update shortly.”Identified
Klaviyo's status page: “Our team is continuing to implement a fix to mitigate the delays affecting event-triggered flows. Delays to affected flows remain at approximately 2 hours. We are working to resolve this as quickly as possible and will share another update shortly.”Identified
Klaviyo's status page: “Event-triggered flow processing is recovering, and our systems are now working through the backlog of delayed messages. Delayed messages will continue to send automatically as the backlog clears. A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.”Monitoring
Klaviyo's status page: “The backlog of delayed event-triggered flows has been fully processed and all systems are now operating normally. We apologize for the disruption this caused. This incident has been resolved.”Resolved
What our own check saw
Nothing of ours failed that day, or we were not checking Klaviyo yet.
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