Outage in Klaviyo

Delayed message sending

Resolved Minor
April 01, 2025 - Started 3 days ago - Lasted about 9 hours
Official incident page

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Outage Details

We are currently experiencing delays of up to an hour when sending email, SMS, and push notifications as of 12:30 PM (US Eastern) on April 1, 2025. We are actively investigating the issue to restore real-time sending.
Components affected
Klaviyo Flow Email Sending Klaviyo Campaign Email Sending
Latest Updates ( sorted recent to last )
RESOLVED 2 days ago - at 04/02/2025 03:08AM

All impacted campaigns have now been sent. This incident is resolved.

MONITORING 3 days ago - at 04/01/2025 11:54PM

Starting at 3:37 PM (US Eastern), campaigns began sending in real-time and we began resending delayed campaigns. We expect that all remaining delayed campaigns will be sent within the next 90 minutes. Transactional flow messages were not impacted by this incident. However, non-transactional flows scheduled to send between 12:22 -15:26ET were not delivered and will not be replayed to avoid untimely messages.

IDENTIFIED 3 days ago - at 04/01/2025 07:46PM

As of 3:37 PM (US Eastern), the issue has been identified and a fix is being implemented. All delayed campaigns will be resent.

INVESTIGATING 3 days ago - at 04/01/2025 05:44PM

We are currently experiencing delays of up to an hour when sending email, SMS, and push notifications as of 12:30 PM (US Eastern) on April 1, 2025. We are actively investigating the issue to restore real-time sending.

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