Outage report · Major outage
Klaviyo outage on Oct 20, 2025
Widespread Access Outage
What happened
Klaviyo reported a major outage starting Oct 20, 2025, 08:58 UTC, affecting Shopify, Klaviyo App, Email Sending, Server-side, Email Sending, Sign-up Forms, Email Deliverability, Lists and 14 more. It was marked resolved at Oct 21, 2025, 17:06 UTC.
- The incident lasted 1d 8h from first report to resolution.
- It was the 2nd longest of 11 significant outages Klaviyo reported in the 12 months up to it.
- Klaviyo had reported 1 other partial or major outage in the 90 days before it.
- 12 other vendors we track reported a significant incident within 12 hours of it.
Latest update from Klaviyo
All services have been restored and are operating normally. Monitoring is complete, and this incident has been resolved. We appreciate your patience throughout this incident.
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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