Klaviyo experienced a minor incident on May 8, 2026 affecting Klaviyo App and Analytics, lasting 9h 29m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating May 08, 2026, 03:02 PM UTC
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.
- identified May 08, 2026, 05:10 PM UTC
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.
- identified May 08, 2026, 06:37 PM UTC
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 May 08, 2026, 08:19 PM UTC
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.
- monitoring May 08, 2026, 11:13 PM UTC
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.
- resolved May 09, 2026, 12:31 AM UTC
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.