Klaviyo: Real-time segmentation delays

Impact: majorStatus: resolvedStarted 2026-03-27 04:46 UTCResolved 2026-03-27 05:15 UTC (30 min)2 updatesSource: stspg.io

Summary

Klaviyo reported major real-time segmentation delays affecting a subset of customers, with segments up to 2.5 hours out of date. The incident started at 2026-03-27 04:46 UTC and lasted 29 min, resolving at 2026-03-27 05:15 UTC. Engineering identified a solution, and Klaviyo confirmed real-time processing was restored.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: SegmentationSegments

Timeline of updates

monitoring2026-03-27 04:46 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 Segments may be out of date by up to 2.5 hours.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.
resolved2026-03-27 05:15 UTC
Real-time segmentation is processing in real-time, and this incident has been resolved.

Rewindex changes for this incident

Major incident: Real-time segmentation delays 2026-03-27 04:46 UTC

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Klaviyo profile · Recent Klaviyo incidents · Markdown · JSON