Outage in Klaviyo
Flow sending delays
Resolved MinorIncident Report
Summary AI Generated
Klaviyo experienced a 2.6-hour incident on September 17, 2026, during which delays affected flow triggering and email sending, causing messages to send later than expected. The root cause was identified and addressed, with sending speeds gradually recovering before full resolution. All delayed messages were retained and successfully delivered once the incident was resolved.
We are investigating reports of delays affecting flow message sending. Some customers may see flow messages send later than expected. We will share another update as soon as we have more information.
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Latest Updates ( sorted recent to last )
RESOLVED
24 days ago - at 09/17/2026 07:46PM
Flow message sending has fully recovered and is processing at normal speeds. Delayed messages were not lost and have since been delivered. This incident has been resolved.
MONITORING
24 days ago - at 09/17/2026 07:21PM
Flow message sending is recovering, and delays are continuing to clear. Some customers may still see flow messages send later than expected as remaining processing catches up. We continue to monitor closely and appreciate your patience throughout this incident.
IDENTIFIED
24 days ago - at 09/17/2026 06:30PM
We are seeing early signs of improvement and continue to work towards full recovery. Customers may still see flow messages send later than expected. We will share another update shortly.
IDENTIFIED
24 days ago - at 09/17/2026 05:31PM
We have identified the cause of the delays affecting flow message sending and are working on a fix. Some customers may continue to see flow messages send later than expected while we resolve this. We will share another update shortly.
INVESTIGATING
24 days ago - at 09/17/2026 05:10PM
We are investigating reports of delays affecting flow message sending. Some customers may see flow messages send later than expected. We will share another update as soon as we have more information.
Latest Klaviyo outages
Analytics Events Processing Delays - 2 days ago
Login and page loading issues - 3 days ago
Flow sending delays - 20 days ago
Sending delays for event-triggered flows - 27 days ago
Issue with Time Delays in Flows - about 2 months ago
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