Major incident

Klaviyo: Real-time segmentation delays

Affected: Segments

Current status of Klaviyo: Operational — live Klaviyo status

Timeline

1. Mar 27, 2026, 04:46 UTC
   monitoring
   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 Segments may be out of date by up to 2.5 hours.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.
2. Mar 27, 2026, 05:15 UTC
   resolved
   Real-time segmentation is processing in real-time, and this incident has been resolved.

Updates as published by Klaviyo (original).