Klaviyo experienced a minor incident on September 3, 2025 affecting Segmentation, lasting 3h 14m. The incident has been resolved; the full update timeline is below.
Affected components
Segmentation
Update timeline
- investigating Sep 03, 2025, 09:53 AM UTC
We are currently experiencing delays in real-time segment processing. Segments may be out of date by up to 3 hours. Flows triggered by segments, 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.
- identified Sep 03, 2025, 12:46 PM UTC
We have identified a root cause and are implementing a fix. We do not currently have an estimate for when processing will be back to real-time. We will post another update once a timeline is available.
- resolved Sep 03, 2025, 01:08 PM UTC
Real-time segmentation is processing in real-time, and the incident has been resolved.