Klaviyo Outage History

A fix has been deployed and system performance is improving. Recent profile property updates are now being reflected in real-time segments more quickly, and the delay has improved to approximately 2.5 hours. Changes to profiles may still take slightly longer than usual to update segment membership as the system continues to catch up. Email and SMS sending and other core functions remain unaffected. We continue to monitor closely and appreciate your patience throughout this incident.

Between 1:15 PM and 2:00 PM US/Eastern on August 12, 2026, some customers experienced errors when scheduling campaigns, and some scheduled campaigns were canceled. If you scheduled a campaign during this window, we recommend checking its status in your account. A fix has been deployed and system performance is improving. We continue to monitor closely and will confirm once fully resolved.

A fix has been deployed and the affected email subscription and campaign features have recovered. Double opt-in confirmation emails are sending again, and preview emails and estimated recipient counts are working as expected. We continue to monitor closely and appreciate your patience throughout this incident.

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.

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.

As of 11:13 PM US/Eastern on July 8, 2026, we have resumed processing webhooks. This means all new webhooks from integrations which use webhooks to update products are now syncing in real time. Our Engineering Team is working implement a repair to catch up on any product update webhooks from during window of impact (9:45 PM and 11:13 PM US/Eastern July 8, 2026). We will confirm once the repair has been complete and the incident has been fully resolved.

Product updates from ecommerce integrations are continuing to sync normally in real time. A background repair to fully update records from the earlier impact window (9:45 PM to 11:13 PM US/Eastern on July 8, 2026) is still in progress. We will confirm once this repair is complete.

Sending delays have recovered, and login and navigation are operating normally. We continue to monitor closely and appreciate your patience throughout this incident.

We are seeing further recovery with WhatsApp messaging, Meta integrations, and Instagram connectivity. WhatsApp messaging should no longer encounter failures. We've replayed all failed messages during this time period. We continue to monitor and will confirm once recovery has completed.

A fix has been deployed and system performance is improving. Customers should start to be able to successfully select a template. We continue to monitor closely and appreciate your patience throughout this incident.

We have deployed a fix and campaign sending is recovering. We are processing the backlog of delayed campaigns and expect to deliver them shortly. We continue to monitor closely and appreciate your patience throughout this incident.

We're seeing further recovery for Shopify integrations, and Shopify data syncing is returning to normal. Automated retry processes are working through the backlog of affected requests. No action is required for customers with existing integrations. Customers who saw errors while setting up a new Shopify integration can retry that setup. We continue to monitor closely and appreciate your patience throughout this incident.

A fix has been deployed and system performance is improving. Intermittent errors, slow page loads, and delays for email and SMS sends are recovering. We continue to monitor closely.

Analytics processing for campaigns and flows is recovering and the delay is decreasing. Sending, scheduling, and other core functions remain fully operational. We're monitoring closely and will confirm once analytics return to normal operation.

Segmentation has been restored to real-time processing, and campaign and forms analytics have now recovered. This was a reporting UI display issue only, no data was lost. Our engineering team continues to monitor closely until our upstream service provider has confirmed full recovery.

We successfully implemented a fix as of 3:20 AM US/Eastern that restored all API activity. We are continuing to monitor the results.

Mar 27, 01:15 EDT Resolved - Real-time segmentation is processing in real-time, and this incident has been resolved. Mar 27, 00:46 EDT Monitoring - Starting around 8:15 PM US Eastern 26th March, we began seeing delays in real-time segment processing for a subset of customers. Segments may be out of date by up to 2.5 hours. Engineering have identified a solution and are working to implement the fix shortly. We will continue to provide updates as real-time segmentation functionality is restored.

Jan 12, 07:23 EST Resolved - This incident has been resolved. Jan 12, 07:05 EST Monitoring - A fix has been implemented and we are monitoring results. Campaign sending and scheduling is back to normal, and all delayed campaigns have been replayed. Jan 12, 06:51 EST Identified - As of 6:45am US Eastern, the issue has been identified and a fix implemented. Any new scheduled or sent campaigns should process, with slight delays. We are actively replaying any campaigns that were delayed. Jan 12, 06:12 EST Investigating - Beginning around 5am US Eastern time, we began observing delays in campaign scheduling and sending. New campaigns, and scheduled RAST (calculate Recipient at Send Times) campaigns, are unable to send. However non-RAST campaigns that were scheduled prior to 5am US Eastern Time are processing as usual. We do not expect data loss. We are actively working to resolve the incident and will provide updates as soon as possible.

Dec 18, 01:36 EST Resolved - This incident has been resolved. Dec 18, 01:06 EST Monitoring - A fix has been implemented and we are monitoring the results. Dec 18, 00:12 EST Identified - The issue has been identified and a fix is being implemented. Dec 17, 23:10 EST Investigating - Starting around 9:52pm US Eastern, a database upgrade failure caused data processing delays in-app. As a result, we are experiencing delays in event processing, flows, unsubscribes, segmentation, sending for certain campaigns, and v3 APIs. No data loss is expected. We are actively working to resolve the incident and will provide updates when possible.

Dec 16, 20:49 EST Resolved - As of 8:23 PM US/Eastern on 12/16/2025, this incident has been resolved and template cloning functionality has been fully restored. Dec 16, 20:11 EST Monitoring - Beginning around 6:42 PM US/Eastern on 12/16/2025, customers may have noticed an issue with cloning templates from the Template Library. Our engineering team has identified the cause of this issue and is implementing a fix to restore functionality. We'll provide updates as soon as more information is available.