Klaviyo Outage History
Uptime record, past incidents, and downtime history for Klaviyo.
Checking current status...
90-Day Trend
Monthly Uptime
| Month | Uptime | Days Tracked | Days with Issues |
|---|---|---|---|
| July 2026 | 55.6% | 9 | 4 |
| June 2026 | 80% | 30 | 6 |
| May 2026 | 77.4% | 31 | 7 |
| April 2026 | 95.2% | 21 | 1 |
Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.
Daily Status (Last 91 Days)
Apr 10
Today
Operational
Degraded
Partial Outage
Major Outage
Maintenance
No Data
Incident History
July 2026
Catalog Webhook Processing Delays
Started: Jul 9, 1:52 AM
monitoring
Product updates from ecommerce integrations are continuing to sync normally in real time. A background repair to fully update records from the earlier impact window (9:45 PM to 11:13 PM US/Eastern on July 8, 2026) is still in progress. We will confirm once this repair is complete.
Jul 9, 4:13 PM
monitoring
As of 11:13 PM US/Eastern on July 8, 2026, we have resumed processing webhooks. This means all new webhooks from integrations which use webhooks to update products are now syncing in real time.
Our Engineering Team is working implement a repair to catch up on any product update webhooks from during window of impact (9:45 PM and 11:13 PM US/Eastern July 8, 2026). We will confirm once the repair has been complete and the incident has been fully resolved.
Jul 9, 4:34 AM
identified
As of 9:45 PM US/Eastern on July 8, 2026, we paused processing new webhooks for product catalogs while we continue working on a fix. Catalog data, including in Templates and Customer Hub, will remain out of date until syncing resumes.
Our engineering team is actively working to restore realtime catalog updates. We'll provide updates as soon as more information is available.
Jul 9, 3:14 AM
investigating
At 4:00 PM US/Eastern on July 8, 2026, we identified delays syncing product updates from integrations using webhooks. This is causing catalog data, including in Templates and the Customer Hub, to not update in real time. Customer may see product data being out of date by up to 4 hours. Sending is not impacted but the product data in templates may not reflect real-time information.
We are working to resolve this as quickly as possible and will share another update shortly.
Jul 9, 1:52 AM
Klaviyo Loading Errors and Sending Delays
Started: Jul 7, 3:33 PM
monitoring
Sending delays have recovered, and login and navigation are operating normally. We continue to monitor closely and appreciate your patience throughout this incident.
Jul 7, 4:47 PM
identified
Campaign and flow sends are now delayed by less than 30 minutes and are continuing to recover. Login and navigation are operating normally. We will share another update shortly.
Jul 7, 4:32 PM
identified
Performance issues affecting login and general navigation in Klaviyo have recovered, and those areas are now operating normally. Some customers may still be experiencing delays with sends while we work to fully restore normal processing. We have identified the cause and are working to resolve the remaining impact as quickly as possible. We will share another update shortly.
Jul 7, 3:56 PM
investigating
Customers may be experiencing slower than usual performance when loading or navigating Klaviyo, and some sends may be delayed. We are actively investigating. We will share another update as soon as we have more information.
Jul 7, 3:33 PM
Infrastructure for consent.
Started: Jul 6, 9:32 PM
investigating
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. During this time, in-app and API operations related to SMS and Whatsapp Consent may be temporarily unavailable. This includes subscribes and unsubscribes. Please note that no data will be lost during this maintenance and these features should run as expected once maintenance has ...
Jul 6, 9:32 PM
Yahoo PH01 Block — Email Bounces to Yahoo/AOL Recipients
Started: Jul 2, 12:17 PM
investigating
Starting at 02:30AM US/Eastern on 07/02/2026, a subset of customers are currently experiencing an increase in bounced emails to Yahoo and AOL recipients with the reason of "554 Message not allowed - [PH01] Email not accepted for policy reasons.".
Our Engineering and Deliverability teams are actively investigating and working with Yahoo to resolve the issue. We do not recommend resending to those bounced recipients at this moment in time.
Jul 2, 12:17 PM
June 2026
Meta Services Disruption
Started: Jun 12, 2:49 PM
monitoring
We are seeing further recovery with WhatsApp messaging, Meta integrations, and Instagram connectivity. WhatsApp messaging should no longer encounter failures. We've replayed all failed messages during this time period. We continue to monitor and will confirm once recovery has completed.
Jun 12, 5:19 PM
identified
Customers may continue to experience issues with Meta-connected features in Klaviyo, including WhatsApp messaging, Meta integrations, and Instagram connectivity. This is caused by a disruption at an upstream provider that affects connections to these features. We have begun to see partial recovery, and some messages are now sending successfully. We are working to resolve this quickly and will share another update as soon as more information is available.
Jun 12, 3:48 PM
investigating
Customers are currently experiencing issues with Meta-connected features in Klaviyo, including WhatsApp messaging, Meta integrations, and Instagram connectivity.
We are investigating a disruption with an upstream provider and will share another update as soon as we have more information.
Jun 12, 2:49 PM
Errors when attempting to select templates for campaigns
Started: Jun 10, 6:47 PM
monitoring
A fix has been deployed and system performance is improving. Customers should start to be able to successfully select a template. We continue to monitor closely and appreciate your patience throughout this incident.
Jun 10, 7:23 PM
identified
We have identified the root cause and are working on a fix. We will share another update shortly.
Jun 10, 7:02 PM
investigating
Customers may be experiencing an error when selecting a template while creating or editing a campaign. Our team is actively investigating and will share another update as soon as we have more information.
Jun 10, 6:47 PM
Campaign sending delays
Started: Jun 8, 9:10 PM
monitoring
We have deployed a fix and campaign sending is recovering. We are processing the backlog of delayed campaigns and expect to deliver them shortly. We continue to monitor closely and appreciate your patience throughout this incident.
Jun 8, 11:54 PM
identified
We are continuing to work through the fix for this issue. We are working to resolve this as quickly as possible and will share another update shortly.
Jun 8, 11:20 PM
identified
We have identified the root cause and are working on a fix. We will share another update shortly.
Jun 8, 9:19 PM
investigating
Some customers may be experiencing delays with campaign sending, where sends are currently stuck in processing. We are investigating the issue and will provide an update as soon as we have more information.
Jun 8, 9:10 PM
WhatsApp Disruption
Started: Jun 6, 5:18 PM
investigating
All WhatsApp functionality is currently unavailable for customers due to an upstream provider outage (including sending, integration setup and template editing). The Engineering team is actively investigating and will share more information as soon as it becomes available.
Jun 6, 5:18 PM
Shopify API Outage
Started: Jun 3, 2:23 PM
monitoring
We're seeing further recovery for Shopify integrations, and Shopify data syncing is returning to normal. Automated retry processes are working through the backlog of affected requests. No action is required for customers with existing integrations. Customers who saw errors while setting up a new Shopify integration can retry that setup. We continue to monitor closely and appreciate your patience throughout this incident.
Jun 3, 3:06 PM
identified
The issue has been identified and we are seeing early signs of recovery. We are continuing to monitor the situation closely and will share another update shortly.
Jun 3, 2:46 PM
investigating
Klaviyo is aware of an issue affecting the Shopify integration.
Some customers attempting to set up a new Shopify integration, or performing actions that depend on the Shopify API, may be encountering errors.
Customers with existing integrations may experience delays in Shopify data syncing. The issue is caused by a partial outage affecting an upstream service, and our team is actively monitoring the situation while automated retry processes work to recover affected requests.
You can follow ...
Jun 3, 2:23 PM
May 2026
SMS Event Processing Delays
Started: May 19, 8:36 PM
identified
We have identified the cause of the issue and SMS event processing is recovering. Delays in processing SMS events are currently around 3 hours and continue to decrease. SMS campaign sending continues to be unaffected and recipients are continuing to receive messages at the expected send times. Customers may continue to see downstream delay in SMS event-triggered flow sending, real-time segments built on SMS event data, and reporting until processing has fully caught up. Customers may also enc...
May 19, 10:21 PM
investigating
SMS event processing is delayed by approximately 2–3 hours. SMS sending is not impacted and recipients are receiving messages at the expected send times. This is impacting when SMS-related events appear in customer accounts, which may cause a delay in SMS event-triggered flows, real-time segments built on SMS event data, and reporting. Our team is actively investigating and we'll provide updates as soon as more information is available.
May 19, 8:36 PM
Page loading errors
Started: May 19, 4:11 PM
monitoring
A fix has been deployed and system performance is improving. Intermittent errors, slow page loads, and delays for email and SMS sends are recovering. We continue to monitor closely.
May 19, 5:17 PM
identified
We have identified the cause of the intermittent errors and slow page loads some customers are experiencing in the Klaviyo app. Some customers may also be experiencing delays of up to 20 minutes for email and SMS sends, as well as delays in flows that send push notifications. Our engineering team is deploying a fix.
May 19, 4:46 PM
investigating
Customers may be experiencing intermittent errors and slow page loads in the Klaviyo app. Our engineering team is actively investigating. We'll provide updates as soon as more information is available.
May 19, 4:11 PM
Campaign and flow page loading errors
Started: May 8, 3:02 PM
monitoring
Analytics processing for campaigns and flows is recovering and the delay is decreasing. Sending, scheduling, and other core functions remain fully operational. We're monitoring closely and will confirm once analytics return to normal operation.
May 8, 11:13 PM
identified
Sending, scheduling, and other core functions are operating normally. Analytics for campaigns and flows are currently delayed by approximately 2 hours. These issues are tied to instability with an upstream infrastructure provider (AWS) and we are continuing to work through them. We'll provide updates as soon as we have more to share.
May 8, 8:19 PM
identified
System performance is improving, and users can now access campaigns pages to complete scheduling. We determined these errors resulted from a combination of instability with an upstream infrastructure provider (AWS) and a significant increase in retry traffic. We continue to monitor closely and appreciate your patience throughout this incident.
May 8, 6:37 PM
identified
We have identified the root cause of the errors and our engineering team is actively working toward a resolution. We'll provide updates as soon as more information is available.
May 8, 5:10 PM
investigating
We are currently investigating reports of errors loading campaign and flow pages within Klaviyo. Campaign and flow sending is not impacted. Our engineering team is actively working to identify and resolve the issue. We'll provide updates as soon as more information is available.
May 8, 3:02 PM
Processing delays
Started: May 8, 1:32 AM
monitoring
Segmentation has been restored to real-time processing, and campaign and forms analytics have now recovered. This was a reporting UI display issue only, no data was lost. Our engineering team continues to monitor closely until our upstream service provider has confirmed full recovery.
May 8, 4:59 PM
identified
Segmentation has been restored to realtime processing. Our engineering team continues to restore the remaining affected analytics. We will continue to provide updates as real-time analytics functionality resumes.
May 8, 7:08 AM
identified
A subset of customers are currently experiencing segmentation processing delays of approximately 1.5 hours and may find that analytics data is not fully up to date. Access to reporting pages has been restored and our engineering team is actively working to bring segmentation and analytics back to real time. We'll provide updates as soon as more information is available.
May 8, 3:46 AM
identified
Our engineering team continues to investigate areas affected by an upstream service provider. Customers may experience processing delays for segmentation and analytics, and loading issues with reporting pages.
For campaigns, sends may not reach the most up-to-date audience due to segmentation delays. Segment-triggered flows may also fail to trigger correctly as profiles may not be added to or removed from segments as expected. We'll provide updates as soon as more information is available.
May 8, 2:22 AM
investigating
We are currently investigating an issue affecting analytics and reporting, flows, campaigns, and segmentation. This issue appears to be related to a disruption with an upstream service provider. Customers may experience errors or be unable to load flows and campaigns pages, see delays in real-time segmentation updates, and find analytics data temporarily unavailable.
Our team is actively working to resolve this. We'll provide updates as soon as more information is available.
May 8, 1:32 AM
Klaviyo Service Disruption
Started: May 5, 9:24 PM
monitoring
Klaviyo services remain restored and operating as expected. Most recovery and repair work is now complete. Remaining work is focused on restoring webhook connections for a subset of WooCommerce and Eventbrite integrations and a subset of campaign analytics repairs, neither of which is affecting customer use of the platform. Our team is continuing to monitor closely.
May 7, 3:48 PM
monitoring
Klaviyo services remain restored and operating as expected. Final background recovery and repair work is ongoing, but is not affecting customer use of the platform. Our team is continuing to monitor closely.
May 6, 9:30 PM
monitoring
Klaviyo services have been restored. Some background data reconciliation and recovery work is still in progress. This is not affecting overall system availability or customer use of the platform. Our team is continuing to monitor closely as we complete final repair efforts.
May 6, 3:59 PM
monitoring
Access to klaviyo.com and core platform services has been restored. The majority of platform areas have returned to normal operation, with many affected services recovering automatically as infrastructure came back online. Our team is continuing to monitor platform stability and is actively working through remaining data repairs, including unsubscribe processing and analytics recovery. We will share further updates as this work progresses.
May 6, 5:59 AM
monitoring
Our engineering team has restored the impacted services and confirmed that systems have resumed functioning as intended. All Campaign/Flow messages impacted which are able to be replayed are currently sending. We're currently monitoring performance and will continue to update as incident is resolved.
May 6, 2:53 AM
identified
We are seeing recovery across APIs, event ingestion, and subscriptions. Our team continues to work toward restoring full functionality.
May 6, 1:38 AM
identified
Recovery is continuing to progress, and additional services are coming back online. Our team remains actively engaged, and we'll provide another update shortly.
May 6, 12:57 AM
identified
Access to klaviyo.com has been restored, and dependent services are progressively coming back online. Our team continues to work toward full recovery, which we expect within the next hour. We'll provide another update in 30 minutes.
May 6, 12:25 AM
investigating
We are continuing to investigate the issue affecting access to klaviyo.com and all associated services. Our engineering team is actively working to restore affected services. We will provide updates as soon as more information is available.
May 5, 11:40 PM
investigating
Our engineering team is continuing to investigate the disruption affecting klaviyo.com, our APIs, and message sending. We will provide updates as more information is available.
May 5, 10:33 PM
investigating
Klaviyo is currently experiencing a service disruption affecting access to klaviyo.com, our APIs, and message sending. Customers may be unable to log in, send campaigns or flows, or have their events processed during this time. Our engineering team is actively investigating the root cause. We'll provide updates as soon as more information is available.
May 5, 9:24 PM
April 2026
API 503 Errors
Started: Apr 26, 7:24 AM
monitoring
We successfully implemented a fix as of 3:20 AM US/Eastern that restored all API activity. We are continuing to monitor the results.
Apr 26, 7:43 AM
identified
Starting at approximately 2:27 AM US/Eastern on 04/25/2026, we began experiencing intermittent elevated errors across our APIs. Some customers may experience 503 errors when trying to log into Klaviyo, load certain pages or make API requests. Our Engineering Team has identified the root cause and has implemented mitigations. We'll provide updates as soon as more information is available.
Apr 26, 7:24 AM
March 2026
Real-time segmentation delays
Started: Mar 27, 4:46 AM
monitoring
Starting around 8:15 PM US Eastern 26th March, we began seeing delays in real-time segment processing for a subset of customers. Segments may be out of date by up to 2.5 hours.
Engineering have identified a solution and are working to implement the fix shortly. We will continue to provide updates as real-time segmentation functionality is restored.
Mar 27, 4:46 AM