Outage in Klaviyo
Page loading errors
Resolved MinorIncident Report
Summary AI Generated
Klaviyo customers experienced intermittent errors and slow page loads in the app, along with delays of up to 20 minutes for email and SMS sends and delays in push notification flows. The incident affected multiple components including the main app, campaign sending, flow sending, and various SMS/MMS services. The engineering team identified the root cause, deployed a fix, and resolved all issues within 1.5 hours, with a small number of affected push notifications being replayed.
Customers may be experiencing intermittent errors and slow page loads in the Klaviyo app. Our engineering team is actively investigating. We'll provide updates as soon as more information is available.
Components affected
Klaviyo App Klaviyo SMS Sending - Toll Free Number MMS Klaviyo SMS Sending - Short Code SMS Klaviyo Flow Email Sending Klaviyo SMS Sending - Short Code MMS Klaviyo Mobile Push Sending Klaviyo Campaign Email Sending Klaviyo SMS Sending - Toll Free Number SMS Klaviyo SMS Sending - OtherTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 05/19/2026 05:38PM
The intermittent errors, slow page loads, and delays for email and SMS sends have been resolved. A small number of push notifications from impacted flows are being replayed and will deliver shortly. This incident has been resolved.
MONITORING
2 days ago - at 05/19/2026 05:17PM
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.
IDENTIFIED
2 days ago - at 05/19/2026 04:46PM
We have identified the cause of the intermittent errors and slow page loads some customers are experiencing in the Klaviyo app. Some customers may also be experiencing delays of up to 20 minutes for email and SMS sends, as well as delays in flows that send push notifications. Our engineering team is deploying a fix.
INVESTIGATING
2 days ago - at 05/19/2026 04:11PM
Customers may be experiencing intermittent errors and slow page loads in the Klaviyo app. Our engineering team is actively investigating. We'll provide updates as soon as more information is available.
source IsDown
Users report possible problems with Klaviyo
Reports started 7 minutes before official outage was reported
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