Real-time segmentation delays

What to do

• Check whether you use Klaviyo Segments. Check your stack

  Drop a package.json, lockfile, Terraform or a list of domains at down.guide to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 3h 14m it lasted.

  Anything that failed between 2025-09-03 09:53 UTC and 2025-09-03 13:08 UTC may need a replay.

• Subscribe to Klaviyo's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=klaviyo works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Klaviyo 3

1. investigatingSep 3, 2025, 9:53 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 Segments may be out of date by up to 3 hours.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.

   provider

2. identifiedSep 3, 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.

   provider

3. resolvedSep 3, 2025, 1:08 PM UTC

   Real-time segmentation is processing in real-time, and the incident has been resolved.

   provider

Corrections

None so far.

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