Klaviyo Outage History

48 incidents recorded over the last 365 days, 41 of them resolved. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.

Live Klaviyo status98.79% uptime history

Every Recorded Klaviyo Incident

Klaviyo incidents, newest first, with date, duration and status.
DateIncidentDurationStatus
Aug 19, 2026Delays in real-time segmentationProfile property updates are now being reflected in real-time segments at normal speed. Any profile property changes made during the incident window have been reflected in segment membership as expected, and no action…1h 23mResolved
Aug 12, 2026Campaign scheduling errorsCampaign scheduling has returned to normal operation. If you scheduled a campaign between 1:15 PM and 2:00 PM US/Eastern on August 12, 2026, we recommend checking its status and rescheduling if needed. This incident has…9 minResolved
Aug 7, 2026Login/MFA MaintenanceThe scheduled maintenance has been completed1h 0mScheduled
Aug 5, 2026Delays affecting campaign scheduling, preview emails, and double opt-in confirmationsThe email subscription and campaign features affected by this incident remain stable and are operating normally. Double opt-in confirmation emails, preview emails, and estimated recipient counts have returned to normal…1h 7mResolved
Jul 23, 2026Sync Tasks FailingThe system remains stable, and imports through the API, CSV upload, or SFTP are processing normally. Imports that failed during the incident were not reprocessed automatically. If an import you started between 8:00 AM…1h 26mResolved
Jul 21, 2026Elevated errors for SMS opt-ins, scheduling, and sendingSMS subscriptions, SMS sending, and the creation and scheduling of SMS and WhatsApp campaigns are operating as expected. This incident has been resolved.32 minResolved
Jul 9, 2026Data Infrastructure MaintenanceThe scheduled maintenance has been completed.1h 0mScheduled
Jul 9, 2026Catalog Webhook Processing DelaysThe repair to catch up on product update webhooks from the window of impact has been completed, and affected product data is up to date. This incident has been resolved.43h 8mResolved
Jul 7, 2026Klaviyo Loading Errors and Sending DelaysAll systems are operating normally. This incident has been resolved.1h 23mResolved
Jul 6, 2026Data Infrastructure MaintenanceThe scheduled maintenance has been completed.1h 0mScheduled
Jul 6, 2026Infrastructure for consent.Beginning at 6:00 PM (US Eastern Time) on Monday, July 6th, 2026, Klaviyo's Engineering team will perform maintenance on our infrastructure for consent. We expect the maintenance period to last approximately 1 hour…670h 32mResolved
Jul 6, 2026Infrastructure for consentBeginning at 6:00 PM (US Eastern Time) on Monday July 6th 2026, Klaviyo's Engineering team will perform maintenance on our infrastructure for consent. We expect the maintenance period to last approximately 1 hour…48h 0mScheduled
Jul 2, 2026Yahoo PH01 Block — Email Bounces to Yahoo/AOL RecipientsThe block within the Yahoo infrastructure that resulted in these elevated bounces has been resolved. Customers can safely resend to bounced recipients from this time period. This incident has been resolved.2h 0mResolved
Jun 12, 2026Meta Services DisruptionMeta-connected features in Klaviyo, including WhatsApp messaging, Meta integrations, and Instagram connectivity, have returned to normal. Messages that failed during the disruption were reprocessed, though a small…2h 40mResolved
Jun 10, 2026Errors when attempting to select templates for campaignsCustomers should no longer see any errors when selecting a template while creating or editing a campaign. This incident has been resolved.58 minResolved
Jun 8, 2026Campaign sending delaysCampaign sending has been restored and the backlog of delayed campaigns has completed sending. This incident has been resolved.3h 39mResolved
Jun 6, 2026WhatsApp DisruptionThe issue affecting WhatsApp features within Klaviyo has been resolved as of 6:45 PM US/Eastern on June 6, 2026. Our Engineering team has monitored performance and see that WhatsApp services have been restored including…5h 47mResolved
Jun 3, 2026Shopify API OutageThe issue affecting Shopify integrations has been resolved, and Shopify data syncing has returned to normal. Automated retry processes will continue to work through the backlog of affected requests. Some customers may…2h 52mResolved
May 19, 2026SMS Event Processing DelaysSMS events have been restored to real time processing as of 6:38 PM ET on May 19, 2026. Our Engineering team has monitored performance and see that systems have fully recovered. This incident has been resolved.3h 54mResolved
May 19, 2026Page loading errorsThe intermittent errors, slow page loads, and delays for email and SMS sends have been resolved. A small number of push notifications from impacted flows are being replayed and will deliver shortly. This incident has…1h 27mResolved
May 8, 2026Campaign and flow page loading errorsAnalytics processing for campaigns and flows is fully caught up and operating normally. We appreciate your patience throughout this incident. This incident has been resolved.9h 29mResolved
May 8, 2026Processing delaysSegmentation continues to process in real-time and is fully recovered. We determined the delays resulted from instability with an upstream infrastructure provider (AWS). This incident is now resolved.17h 32mResolved
May 5, 2026Klaviyo Service DisruptionAll Klaviyo services have been fully restored and final recovery work is complete. We appreciate your patience throughout this incident. This incident has been resolved.49h 38mResolved
Apr 26, 2026API 503 ErrorsWe confirmed that all API activity has been stable since the fix was released. Any requests that returned 503 errors during the outage window will need to be retried. This incident has been resolved.46 minResolved
Mar 27, 2026Real-time segmentation delaysReal-time segmentation is processing in real-time, and this incident has been resolved.29 minResolved
Jan 12, 2026Issues with Campaign Sending and SchedulingThis incident has been resolved.1h 10mResolved
Dec 22, 2025Users with access to multiple accounts being unable to switch accountsThis incident has been resolved.1h 30mResolved
Dec 18, 2025Data processing delaysThis incident has been resolved.2h 25mResolved
Dec 17, 2025Template Cloning FunctionalityAs of 8:23 PM US/Eastern on 12/16/2025, this incident has been resolved and template cloning functionality has been fully restored.37 minResolved
Dec 5, 2025Cloudflare incident disrupting KlaviyoBetween 3:48am (US Eastern) and 4:10am (US Eastern) Cloudflare experienced an outage which affected Klaviyo. During this time, users were unable to access Klaviyo.com and all Klaviyo APIs. During this window, a number…-102 minResolved
Dec 3, 2025Customer Agent Follow Up Prompts not AppearingMonitoring is complete, and this incident has been resolved. We appreciate your patience throughout this incident.38 minResolved
Nov 28, 2025Klaviyo Helpdesk, Customer Hub, and Customer Agent services OutageThis incident has been resolved.1h 38mResolved
Nov 18, 2025Cloudflare incident disrupting onsite eventsThis incident has been resolved, as of 2 pm US eastern. All affected components are operational.5h 7mResolved
Nov 14, 2025Analytics MaintenanceThe scheduled maintenance has been completed.6h 0mScheduled
Nov 13, 2025Analytics MaintenanceThe scheduled maintenance has been completed.6h 30mScheduled
Nov 12, 2025Analytics MaintenanceThe scheduled maintenance has been completed.3h 0mScheduled
Nov 2, 2025Facebook Ads are not syncing correctlyThe incident is now resolved. All delayed data for Facebook Integrations, which occurred between 1:00 AM and 2:00 AM, has been fully restored.10h 37mResolved
Oct 29, 2025SMS Events Processing DelaysThis incident has been resolved.1h 26mResolved
Oct 24, 2025Template Tag redirecting issueBetween 3:46pm EST and 7:29pm EST on 23rd Oct 2025, customers may have noticed an issue causing web view & unsubscribe tags to redirect to incorrect Template previews or broken pages. This may have affected some…0 minResolved
Oct 20, 2025Widespread Access OutageAll services have been restored and are operating normally. Monitoring is complete, and this incident has been resolved. We appreciate your patience throughout this incident.32h 7mResolved
Oct 2, 2025Klaviyo App Access IssuesThis incident has been resolved.16 minResolved
Oct 1, 2025Consent pagesThis incident has been resolved.15 minResolved
Sep 19, 2025Delay in Real-Time Event ProcessingThis incident has been resolved.5h 46mResolved
Sep 19, 2025Campaigns List ViewThis incident has been resolved.239h 49mResolved
Sep 16, 2025Event-triggered flow delaysThis incident has been resolved.15 minResolved
Sep 3, 2025Omnichannel Campaign ResendsThis incident has been resolved.1h 23mResolved
Sep 3, 2025Real-time segmentation delaysReal-time segmentation is processing in real-time, and the incident has been resolved.3h 14mResolved
Aug 27, 2025Klaviyo App Access IssuesBetween 10:50am - 11:03am US/Eastern on 8/27/25, we experienced an issue that resulted in errors accessing the Klaviyo app, disruption in event ingestion, and issues submitting signup forms. We have resolved the issue.0 minResolved

How to Read This Klaviyo Incident Log

Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Klaviyo acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.

Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.

The longest single Klaviyo outage in this window ran 27d 22h, against a mean recovery of 1d 1h. If you depend on Klaviyo in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.