Klaviyo experienced a minor incident on September 16, 2025 affecting Flow Email Sending, lasting 15m. The incident has been resolved; the full update timeline is below.
Affected components
Flow Email Sending
Update timeline
- identified Sep 16, 2025, 09:05 PM UTC
Starting 3:50pm US/Eastern on 9/16/25, we began observing delays in event-triggered flows. Users may see delays of up to 60 minutes. We're currently working on a fix. We’ll provide updates as soon as more information is available.
- monitoring Sep 16, 2025, 09:17 PM UTC
A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.
- resolved Sep 16, 2025, 09:21 PM UTC
This incident has been resolved.