Outage report · Partial outage

Klaviyo outage on Oct 22, 2026

Outbound Webhook Delays

SeverityPartial outage
StartedOct 22, 2026, 22:20UTC
ResolvedOct 23, 2026, 13:06UTC
Duration14h 47m

What happened

Klaviyo reported a partial outage starting Oct 22, 2026, 22:20 UTC, affecting Analytics. It was marked resolved at Oct 23, 2026, 13:06 UTC.

  • The incident lasted 14h 47m from first report to resolution.
  • It was the 2nd longest of 10 significant outages Klaviyo reported in the 12 months up to it.
  • Klaviyo had reported 3 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

Event webhook delivery was fully restored at 2:40 AM US/Eastern on October 23, 2026 after the backlog was processed. Webhook data was retained, and webhook actions in flows were not affected. We apologize for the disruption this caused. This incident has been resolved.

Read Klaviyo's official incident report ↗

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

62.2/100

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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