Companies / Klaviyo / incidents

Klaviyo: Delay in Real-Time Event Processing

Affected components: AnalyticsProfilesSegmentationSegments

Timeline of updates

1. identified2025-09-19 14:38 UTC

   At around 7 AM Eastern time, we began experiencing delays in real-time event processing. Events may be out of date by up to 3 hours. Flows, Segments, Profiles, Reporting, as well as segment-targeted forms, may be impacted. We are actively working to restore real-time processing and will continue to provide updates here.

2. identified2025-09-19 17:07 UTC

   A fix has been implemented and we are monitoring the results. We expect real time event processing to be fully restored within 1 hour.

3. monitoring2025-09-19 18:42 UTC

   Event processing has been restored to real-time. There was no data loss as a result of this incident. We’re continuing to monitor and will post another update once we have fully cleared any backlog of processing data.

4. resolved2025-09-19 20:24 UTC

   This incident has been resolved.

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