Klaviyo: SMS Event Processing Delays
Klaviyo's status page listed this on 20 May 2026. Lasted 3.9 h, filed against Segments, Text Message Sending, Processing and Analytics. This is their record, not a measurement of ours.
What happened
Started
Resolved
Lasted3.9 h
What failedSegments, Text Message Sending, Processing and Analytics
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: SMS Event Processing Delays
Klaviyo's status page: “SMS event processing is delayed by approximately 2–3 hours. SMS sending is not impacted and recipients are receiving messages at the expected send times. This is impacting when SMS-related events appear in customer accounts, which may cause a delay in SMS event-triggered flows, real-time segments built on SMS event data, and reporting. Our team is actively investigating and we'll provide updates as soon as more information is available.”Investigating
Klaviyo's status page: “We have identified the cause of the issue and SMS event processing is recovering. Delays in processing SMS events are currently around 3 hours and continue to decrease. SMS campaign sending continues to be unaffected and recipients are continuing to receive messages at the expected send times. Customers may continue to see downstream delay in SMS event-triggered flow sending, real-time segments built on SMS event data, and reporting until processing has fully caught up. Customers may also encounter errors when creating and registering RCS agents, and when viewing videos within the platform. W…”Identified
Klaviyo's status page: “SMS events have been restored to real time processing as of 6:38 PM ET on May 19, 2026. Our Engineering team has monitored performance and see that systems have fully recovered. 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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