Outage report · Partial outage
Klaviyo outage on Nov 18, 2025
Cloudflare incident disrupting onsite events
What happened
Klaviyo reported a partial outage starting Nov 18, 2025, 13:58 UTC, affecting Server-side, Sign-up Forms, Lists, Consent Pages. It was marked resolved at Nov 18, 2025, 19:06 UTC.
- The incident lasted 5h 7m from first report to resolution.
- Klaviyo had reported 2 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
This incident has been resolved, as of 2 pm US eastern. All affected components are operational.
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.
Encountering issues with the service because of our provider cloudflare is encountering problems
Portal and Websites failing to load due to a 3rd party service outage
Console, Website, & API Availability Issues: Global Cloudflare Outage
503 Service Temporarily Unavailable error when accessing Contacts
Cloudflare incident is causing intermittent errors when accessing Bizzabo
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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