# Cloudflare incident disrupting Klaviyo

- Provider: [Klaviyo](https://down.guide/klaviyo)
- Level: confirmed
- Impact: Operational
- lasted 0m
- started 2025-12-05 10:42 UTC
- us
- id: DWN-b8e9a1c40e
- Official page: https://stspg.io/bbj7gt47htp5

## Updates from Klaviyo
### 2025-12-05 09:00 UTC: resolved
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

From the builder: does your app depend on Klaviyo? [Sazabi](https://www.sazabi.com/?utm_source=down-guide&utm_medium=markdown&utm_content=klaviyo) detects problems in your own logs without hand-written monitors, and you can ask it in plain language which errors mention Klaviyo.

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