Outage report · Partial outage
Klaviyo outage on Aug 27, 2026
Issue with Time Delays in Flows
What happened
Klaviyo reported a partial outage starting Aug 27, 2026, 00:09 UTC, affecting Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending, Processing. It was marked resolved at Aug 27, 2026, 03:42 UTC.
- The incident lasted 3h 34m from first report to resolution.
- Klaviyo had reported 4 other partial or major outages in the 90 days before it.
- 12 other vendors we track reported a significant incident within 12 hours of it.
Latest update from Klaviyo
As of 11:26 PM US/Eastern on August 26, 2026, the repair to process affected flow messages from the window of impact has been completed, and flow sending has resumed as expected across all channels. We apologize for the disruption this caused. This incident has been resolved.
What our independent monitoring saw
Our independent monitoring of Klaviyo started after this incident, so this report is based on Klaviyo's status page.
Other outages around the same time
Significant incidents other vendors reported within 12 hours of this one.
Klaviyo's overall reliability
Klaviyo has a reliability score of 62.2/100, with 99.26% effective uptime and 13 incidents over the last 90 days.
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