Klaviyo experienced a major incident on March 27, 2026 affecting Segmentation, lasting 29m. The incident has been resolved; the full update timeline is below.
Affected components
Segmentation
Update timeline
- monitoring Mar 27, 2026, 04:46 AM UTC
Starting around 8:15 PM US Eastern 26th March, we began seeing delays in real-time segment processing for a subset of customers. Segments may be out of date by up to 2.5 hours. Engineering have identified a solution and are working to implement the fix shortly. We will continue to provide updates as real-time segmentation functionality is restored.
- resolved Mar 27, 2026, 05:15 AM UTC
Real-time segmentation is processing in real-time, and this incident has been resolved.