Outage in Klaviyo
Data processing delays
Resolved MinorIncident Report
Starting around 9:52pm US Eastern, a database upgrade failure caused data processing delays in-app. As a result, we are experiencing delays in event processing, flows, unsubscribes, segmentation, sending for certain campaigns, and v3 APIs. No data loss is expected. We are actively working to resolve the incident and will provide updates when possible.
Components affected
Klaviyo API Klaviyo Segmentation Klaviyo Flow Triggering Klaviyo App Klaviyo Campaign Email Sending Klaviyo Flow Email SendingNeed to monitor Klaviyo outages?
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Latest Updates ( sorted recent to last )
RESOLVED
about 1 month ago - at 12/18/2025 06:36AM
This incident has been resolved.
MONITORING
about 1 month ago - at 12/18/2025 06:06AM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
about 1 month ago - at 12/18/2025 05:12AM
The issue has been identified and a fix is being implemented.
INVESTIGATING
about 1 month ago - at 12/18/2025 04:10AM
Starting around 9:52pm US Eastern, a database upgrade failure caused data processing delays in-app. As a result, we are experiencing delays in event processing, flows, unsubscribes, segmentation, sending for certain campaigns, and v3 APIs. No data loss is expected. We are actively working to resolve the incident and will provide updates when possible.
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