Major incident

Klaviyo: Elevated errors for SMS opt-ins, scheduling, and sending

Affected: Text Message Sending, WhatsApp Sending

Current status of Klaviyo: Operational — live Klaviyo status

Timeline

1. Jul 21, 2026, 20:36 UTC
   investigating
   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.
2. Jul 21, 2026, 20:47 UTC
   identified
   We have identified the cause of the issue and a fix has been implemented. We are starting to see improvements in system performance.
3. Jul 21, 2026, 20:57 UTC
   monitoring
   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.
4. Jul 21, 2026, 21:09 UTC
   resolved
   SMS subscriptions, SMS sending, and the creation and scheduling of SMS and WhatsApp campaigns are operating as expected. This incident has been resolved.

Updates as published by Klaviyo (original).