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Outage in Klaviyo

Campaign and flow page loading errors

Resolved Minor
May 08, 2026 - Started 4 days ago - Lasted about 10 hours
Official incident page

Incident Report

Summary AI Generated

Klaviyo experienced a 9.5-hour incident where users encountered errors loading campaign and flow pages, though email sending functionality remained operational throughout. The issue was caused by AWS infrastructure instability combined with increased retry traffic, which also resulted in analytics processing delays of approximately 2 hours. The incident was fully resolved with analytics processing returning to normal operation and all affected components restored.

We are currently investigating reports of errors loading campaign and flow pages within Klaviyo. Campaign and flow sending is not impacted. Our engineering team is actively working to identify and resolve the issue. We'll provide updates as soon as more information is available.
Components affected
Klaviyo Analytics Klaviyo App

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Latest Updates ( sorted recent to last )
RESOLVED 4 days ago - at 05/09/2026 12:31AM

Analytics processing for campaigns and flows is fully caught up and operating normally. We appreciate your patience throughout this incident. This incident has been resolved.

MONITORING 4 days ago - at 05/08/2026 11:13PM

Analytics processing for campaigns and flows is recovering and the delay is decreasing. Sending, scheduling, and other core functions remain fully operational. We're monitoring closely and will confirm once analytics return to normal operation.

IDENTIFIED 4 days ago - at 05/08/2026 08:19PM

Sending, scheduling, and other core functions are operating normally. Analytics for campaigns and flows are currently delayed by approximately 2 hours. These issues are tied to instability with an upstream infrastructure provider (AWS) and we are continuing to work through them. We'll provide updates as soon as we have more to share.

IDENTIFIED 4 days ago - at 05/08/2026 06:37PM

System performance is improving, and users can now access campaigns pages to complete scheduling. We determined these errors resulted from a combination of instability with an upstream infrastructure provider (AWS) and a significant increase in retry traffic. We continue to monitor closely and appreciate your patience throughout this incident.

IDENTIFIED 4 days ago - at 05/08/2026 05:10PM

We have identified the root cause of the errors and our engineering team is actively working toward a resolution. We'll provide updates as soon as more information is available.

INVESTIGATING 4 days ago - at 05/08/2026 03:02PM

We are currently investigating reports of errors loading campaign and flow pages within Klaviyo. Campaign and flow sending is not impacted. Our engineering team is actively working to identify and resolve the issue. We'll provide updates as soon as more information is available.

Latest Klaviyo outages

Processing delays - 5 days ago
API 503 Errors - 16 days ago
Real-time segmentation delays - about 2 months ago

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