Klaviyo incident
Elevated errors for SMS opt-ins, scheduling, and sending
Resolved after 32 minutes, affecting Text Message Sending and WhatsApp Sending, on July 21, 2026.
SMS subscriptions, SMS sending, and the creation and scheduling of SMS and WhatsApp campaigns are operating as expected. This incident has been resolved.
Affected components
Update timeline
- investigating Jul 21, 2026, 08:36 PM UTC
We are currently investigating an issue impacting SMS subscriptions, delays in SMS sending, and errors when creating or scheduling SMS and WhatsApp campaigns. We are working to restore normal service as quickly as possible. We will share another update as soon as we have more information.
- identified Jul 21, 2026, 08:47 PM UTC
We have identified the cause of the issue and a fix has been implemented. We are starting to see improvements in system performance.
- monitoring Jul 21, 2026, 08:57 PM UTC
System performance for SMS opt-in forms, sending, and campaign creation and scheduling remains stable. We continue to monitor closely and appreciate your patience throughout this incident.
- resolved Jul 21, 2026, 09:09 PM UTC
SMS subscriptions, SMS sending, and the creation and scheduling of SMS and WhatsApp campaigns are operating as expected. This incident has been resolved.
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