Current answer
Klaviyo experienced a major incident: Issue with Time Delays in Flows. ServiceAlert observed recovery on Aug 27, 2026.
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Incident Lifecycle
Affected Components
Email Sending
Text Message Sending
WhatsApp Sending
Mobile Push Sending
Processing
Incident Timeline
Monitoring
As of 9:30PM US/Eastern, flows have resumed sending as expected across all affected messaging channels. We are processing the backlog of affected flow messages. A fix has been deployed and system performance is improving.
We continue to monitor closely and appreciate your patience throughout this incident.
We continue to monitor closely and appreciate your patience throughout this incident.
Aug 27, 2026 at 1:51 AM UTC
Identified
Our Engineering team has identified the cause of this issue and is working to implement a fix to resolve the remaining impact on sending for flows affected by the time delay issue. Once the fix is rolled out, we will review and repair any impacted flows.
We are working to resolve this as quickly as possible and will share another update shortly.
We are working to resolve this as quickly as possible and will share another update shortly.
Aug 27, 2026 at 1:15 AM UTC
Investigating
At 3:25 PM US/Eastern on August 26, 2026, we began experiencing an issue where some profiles are not progressing past time delay actions in flows as expected. This is affecting flow sending across all messaging channels, including email, text messaging, push, and WhatsApp. Message sending from campaigns, and flows that do not include time delay actions are not impacted.
We are actively working on a fix. We will continue to provide updates as more information becomes available.
We are actively working on a fix. We will continue to provide updates as more information becomes available.
Aug 27, 2026 at 12:09 AM UTC
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