Klaviyo experienced a minor incident on November 18, 2025, lasting —. The incident has been resolved; the full update timeline is below.
Update timeline
- monitoring Nov 18, 2025, 07:06 PM UTC
Nov 18, 14:06 EST Resolved - This incident has been resolved, as of 2 pm US eastern. All affected components are operational. Nov 18, 09:34 EST Monitoring - Fixes have been implemented for some services and we are monitoring the issues. Nov 18, 08:58 EST Identified - Cloudflare declared an incident around 6:30 am US Eastern causing all onsite activities, such as unsubscribe and subscribe preference pages and onsite form submissions to error out. Forms appear, but no requests or related events or subscriptions are processing. API calls are also experiencing 403s. https://www.cloudflarestatus.com/incidents/8gmgl950y3h7 We're currently investigating mitigation steps for the affected features.