Klaviyo incident

Cloudflare incident disrupting Klaviyo

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Resolved on December 5, 2025.

resolved Dec 05, 2025, 10:42 AM UTC

Between 3:48am (US Eastern) and 4:10am (US Eastern) Cloudflare experienced an outage which affected Klaviyo. During this time, users were unable to access Klaviyo.com and all Klaviyo APIs. During this window, a number of services were affected. Subscription events and click tracking events were lost. Outbound campaign message sending was not affected. Klaviyo is now fully operational and this incident has been resolved. https://www.cloudflarestatus.com/incidents/k9ppxftx8bs5

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Started
Dec 05, 2025, 09:00 AM UTC
Resolved
Dec 05, 2025, 09:00 AM UTC
Duration
–
Detected by Pingoru
Dec 05, 2025, 09:00 AM UTC

Update timeline

  1. resolved Dec 05, 2025, 10:42 AM UTC

    Between 3:48am (US Eastern) and 4:10am (US Eastern) Cloudflare experienced an outage which affected Klaviyo. During this time, users were unable to access Klaviyo.com and all Klaviyo APIs. During this window, a number of services were affected. Subscription events and click tracking events were lost. Outbound campaign message sending was not affected. Klaviyo is now fully operational and this incident has been resolved. https://www.cloudflarestatus.com/incidents/k9ppxftx8bs5

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