Critical incident

Klaviyo: Klaviyo Service Disruption

Affected: Klaviyo App, Email Sending, Email Sending, Sign-up Forms, Email Deliverability, Lists, Segments, Customer Agent, Consent Pages, Profiles, Helpdesk, Mobile Push Sending, Customer Hub, Reviews, Analytics

Current status of Klaviyo: Operational — live Klaviyo status

Timeline

1. May 5, 2026, 21:24 UTC
   investigating
   Klaviyo is currently experiencing a service disruption affecting access to klaviyo.com, our APIs, and message sending. Customers may be unable to log in, send campaigns or flows, or have their events processed during this time. Our engineering team is actively investigating the root cause. We'll provide updates as soon as more information is available.
2. May 5, 2026, 22:33 UTC
   investigating
   Our engineering team is continuing to investigate the disruption affecting klaviyo.com, our APIs, and message sending. We will provide updates as more information is available.
3. May 5, 2026, 23:40 UTC
   investigating
   We are continuing to investigate the issue affecting access to klaviyo.com and all associated services. Our engineering team is actively working to restore affected services. We will provide updates as soon as more information is available.
4. May 6, 2026, 00:25 UTC
   identified
   Access to klaviyo.com has been restored, and dependent services are progressively coming back online. Our team continues to work toward full recovery, which we expect within the next hour. We'll provide another update in 30 minutes.
5. May 6, 2026, 00:57 UTC
   identified
   Recovery is continuing to progress, and additional services are coming back online. Our team remains actively engaged, and we'll provide another update shortly.
6. May 6, 2026, 01:38 UTC
   identified
   We are seeing recovery across APIs, event ingestion, and subscriptions. Our team continues to work toward restoring full functionality.
7. May 6, 2026, 02:53 UTC
   monitoring
   Our engineering team has restored the impacted services and confirmed that systems have resumed functioning as intended. All Campaign/Flow messages impacted which are able to be replayed are currently sending. We're currently monitoring performance and will continue to update as incident is resolved.
8. May 6, 2026, 05:59 UTC
   monitoring
   Access to klaviyo.com and core platform services has been restored. The majority of platform areas have returned to normal operation, with many affected services recovering automatically as infrastructure came back online. Our team is continuing to monitor platform stability and is actively working through remaining data repairs, including unsubscribe processing and analytics recovery. We will share further updates as this work progresses.
9. May 6, 2026, 15:59 UTC
   monitoring
   Klaviyo services have been restored. Some background data reconciliation and recovery work is still in progress. This is not affecting overall system availability or customer use of the platform. Our team is continuing to monitor closely as we complete final repair efforts.
10. May 6, 2026, 21:30 UTC
    monitoring
    Klaviyo services remain restored and operating as expected. Final background recovery and repair work is ongoing, but is not affecting customer use of the platform. Our team is continuing to monitor closely.
11. May 7, 2026, 15:48 UTC
    monitoring
    Klaviyo services remain restored and operating as expected. Most recovery and repair work is now complete. Remaining work is focused on restoring webhook connections for a subset of WooCommerce and Eventbrite integrations and a subset of campaign analytics repairs, neither of which is affecting customer use of the platform. Our team is continuing to monitor closely.
12. May 7, 2026, 23:02 UTC
    resolved
    All Klaviyo services have been fully restored and final recovery work is complete. We appreciate your patience throughout this incident. This incident has been resolved.

Updates as published by Klaviyo (original).