Outage in Klaviyo

Cloudflare incident disrupting onsite events

Resolved Major
November 18, 2025 - Started 1 day ago - Lasted about 5 hours
Official incident page

Incident Report

Cloudflare declared an incident around 6:30 am US Eastern causing all onsite activities, such as unsubscribe and subscribe preference pages and onsite form submissions to error out. Forms appear, but no requests or related events or subscriptions are processing. API calls are also experiencing 403s. https://www.cloudflarestatus.com/incidents/8gmgl950y3h7 We're currently investigating mitigation steps for the affected features.
Components affected
Klaviyo Unsubscribe & Preference Pages Klaviyo Signup Forms Klaviyo List Subscription Klaviyo API

Need to monitor Klaviyo outages?

One place to monitor all your cloud vendors. Get instant alerts when an outage is detected.

Start Free Trial
Latest Updates ( sorted recent to last )
RESOLVED 1 day ago - at 11/18/2025 07:06PM

This incident has been resolved, as of 2 pm US eastern. All affected components are operational.

MONITORING 1 day ago - at 11/18/2025 02:34PM

Fixes have been implemented for some services and we are monitoring the issues.

IDENTIFIED 1 day ago - at 11/18/2025 01:58PM

Cloudflare declared an incident around 6:30 am US Eastern causing all onsite activities, such as unsubscribe and subscribe preference pages and onsite form submissions to error out. Forms appear, but no requests or related events or subscriptions are processing. API calls are also experiencing 403s. https://www.cloudflarestatus.com/incidents/8gmgl950y3h7

We're currently investigating mitigation steps for the affected features.

Latest Klaviyo outages

Facebook Ads are not syncing correctly - 18 days ago
SMS Events Processing Delays - 21 days ago
Widespread Access Outage - about 1 month ago
Klaviyo App Access Issues - about 2 months ago
Consent pages - about 2 months ago

Status Page Aggregator: Cut the Noise, Keep the Control

With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.

Start free trial

No credit card required · Cancel anytime · 4600 services available

Integrations with Slack Microsoft Teams Google Chat Datadog PagerDuty Zapier Discord Webhook