SMS Events Processing Delays

Event timeline

How this incident unfolded, from the official status page.

1. Identified

   12 months ago

   Klaviyo

   Starting at 1:00 PM US/Eastern, we began experiencing delays of up to 40 minutes for SMS events processing. SMS Sending is not impacted. We have identified the issue and are in the process of reverting a change to restore normal processing. We'll provide updates as soon as more information is available.

2. Identified

   12 months ago

   Klaviyo

   We want to acknowledge that downstream services (Segments and Flows) relying on the SMS events will also be impacted, until the event processing has caught up, which we expect to happen shortly. We'll continue to provide updates as they are available.

3. Identified

   12 months ago

   Klaviyo

   We are still working to restore normal processing of SMS events. A subset of customers may see delays of up to 90 minutes at this time. SMS Sending remains unaffected.

4. Monitoring

   12 months ago

   Klaviyo

   We have mitigated the delays and we expect SMS event processing to be fully caught up within the next 20 minutes. There was no data loss as a result of this incident.

5. Resolved

   12 months ago

   Klaviyo

   This incident has been resolved.