Klaviyo incident

Delay in Real-Time Event Processing

Resolved after 5 hours 46 minutes, affecting Analytics and Segments and 1 more, on September 19, 2025.

monitoring Sep 19, 2025, 06:42 PM 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.

Started
Sep 19, 2025, 02:38 PM UTC
Resolved
Sep 19, 2025, 08:24 PM UTC
Duration
5h 46m
Detected by Pingoru
Sep 19, 2025, 02:38 PM UTC

Affected components

AnalyticsSegmentsProfiles

Update timeline

  1. identified Sep 19, 2025, 02:38 PM 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 Events may be out of date by up to 3 hours.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. identified Sep 19, 2025, 05:07 PM 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. monitoring Sep 19, 2025, 06:42 PM 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. resolved Sep 19, 2025, 08:24 PM UTC

    This incident has been resolved.

Your product runs on more than Klaviyo

Add the vendors you depend on and get one message when any of them reports trouble. Free for 3 vendors, no card.

Add your stack →