Klaviyo experienced a notice incident on July 2, 2025 affecting Flow Email Sending and SMS Sending - Other, lasting 22h 47m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Jul 02, 2025, 07:41 PM UTC
From 1:39-2:47PM US/Eastern on 7/2/25, Klaviyo users may have had duplicate flow messages sent to their profiles. Customers received the original message as expected, but may have received duplicate versions in the minutes to follow. Duplicate sending is no longer occurring. Our Engineering Team is investigating any downstream effects and will provide an update once we have more information.
- identified Jul 02, 2025, 10:58 PM UTC
We're continuing to work through repairs to billing as a result of the duplicate sends and will provide credits to the impacted accounts. We'll provide another update once we have more information to share.
- resolved Jul 03, 2025, 06:29 PM UTC
The team continues to work through the appropriate adjustments to billing as a result of these duplicate sends. We expect to follow up with impacted customers early next week with more information once this work has been completed.