Klaviyo experienced a minor incident on July 23, 2026 affecting Server-side and WooCommerce and 1 more component, lasting 1h 26m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Jul 23, 2026, 02:35 PM UTC
Beginning around 8:09 AM US/Eastern on July 23, 2026, profile imports started through the API, CSV upload, or SFTP may fail to complete, and the imported profiles may not be created. New integrations connected during this period may also be delayed in starting their initial sync. We have identified the cause and are deploying a fix. We are working to resolve this as quickly as possible and will share another update shortly.
- monitoring Jul 23, 2026, 03:16 PM UTC
Profile imports have recovered, and imports through the API, CSV upload, or SFTP are processing normally again. Integrations connected during the impact window are also resuming their initial syncs. Our team is working to reprocess API imports that failed during the incident. We continue to monitor closely and appreciate your patience throughout this incident.
- resolved Jul 23, 2026, 04:01 PM UTC
The system remains stable, and imports through the API, CSV upload, or SFTP are processing normally. Imports that failed during the incident were not reprocessed automatically. If an import you started between 8:00 AM and 11:00 AM US/Eastern on July 23, 2026 did not complete, please re-run it to ensure those profiles are imported. This incident has been resolved.