Mar <var data-var='date'>27</var>, <var data-var='time'>01:15</var> EDT Resolved - Real-time segmentation is processing in real-time, and this incident has been resolved.Mar <var data-var='date'>27</var>, <var data-var='time'>00:46</var> EDT 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 Segments may be out of date by up to 2.5 hours.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.

Real-time segmentation delays

Jan <var data-var='date'>12</var>, <var data-var='time'>07:23</var> EST Resolved - This incident has been resolved.Jan <var data-var='date'>12</var>, <var data-var='time'>07:05</var> EST Monitoring - A fix has been implemented and we are monitoring results. Campaign sending and scheduling is back to normal, and all delayed campaigns have been replayed.Jan <var data-var='date'>12</var>, <var data-var='time'>06:51</var> EST Identified - As of 6:45am US Eastern, the issue has been identified and a fix implemented. Any new scheduled or sent campaigns should process, with slight delays. We are actively replaying any campaigns that were delayed.Jan <var data-var='date'>12</var>, <var data-var='time'>06:12</var> EST Investigating - Beginning around 5am US Eastern time, we began observing delays in campaign scheduling and sending. New campaigns, and scheduled RAST (calculate Recipient at Send Times) campaigns, are unable to send. However non-RAST campaigns that were scheduled prior to 5am US Eastern Time are processing as usual. We do not expect data loss. We are actively working to resolve the incident and will provide updates as soon as possible.

Issues with Campaign Sending and Scheduling

Dec <var data-var='date'>22</var>, <var data-var='time'>19:07</var> EST Resolved - This incident has been resolved.Dec <var data-var='date'>22</var>, <var data-var='time'>18:58</var> EST Monitoring - We have confirmed the app is now widely available and are moving the incident to monitoring. 10% of accounts experienced messaging delays during this window. We are working to replay any impacted messages, including unsubscribes, inbound SMS, and flows. Any campaigns that failed during this time will need to be manually resent. We will continue to monitor system performance.Dec <var data-var='date'>22</var>, <var data-var='time'>18:37</var> EST Update - We identified broader service disruption across the Klaviyo app between 5:55 pm and approximately 6:10 pm ET. While initial reports were limited to account switching, we have since confirmed additional impact to app availability and functionality. The underlying issue has been addressed, and the app is now available. Some customers may continue to experience intermittent issues as systems fully recover. We are actively monitoring.Dec <var data-var='date'>22</var>, <var data-var='time'>17:37</var> EST Investigating - We are investigating reports of users unable to switch accounts once logged into Klaviyo

Users with access to multiple accounts being unable to switch accounts

Dec <var data-var='date'>18</var>, <var data-var='time'>01:36</var> EST Resolved - This incident has been resolved.Dec <var data-var='date'>18</var>, <var data-var='time'>01:06</var> EST Monitoring - A fix has been implemented and we are monitoring the results.Dec <var data-var='date'>18</var>, <var data-var='time'>00:12</var> EST Identified - The issue has been identified and a fix is being implemented.Dec <var data-var='date'>17</var>, <var data-var='time'>23:10</var> EST Investigating - Starting around 9:52pm US Eastern, a database upgrade failure caused data processing delays in-app. As a result, we are experiencing delays in event processing, flows, unsubscribes, segmentation, sending for certain campaigns, and v3 APIs. No data loss is expected. We are actively working to resolve the incident and will provide updates when possible.

Data processing delays

Dec <var data-var='date'>16</var>, <var data-var='time'>20:49</var> EST Resolved - As of 8:23 PM US/Eastern on 12/16/2025, this incident has been resolved and template cloning functionality has been fully restored.Dec <var data-var='date'>16</var>, <var data-var='time'>20:11</var> EST Monitoring - Beginning around 6:42 PM US/Eastern on 12/16/2025, customers may have noticed an issue with cloning templates from the Template Library. Our engineering team has identified the cause of this issue and is implementing a fix to restore functionality. We'll provide updates as soon as more information is available.

Template Cloning Functionality

Dec <var data-var='date'> 5</var>, <var data-var='time'>04:00</var> EST Resolved - Between 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 of services were affected. Subscription events and click tracking events were lost. Outbound campaign message sending was not affected. Klaviyo is now fully operational and this incident has been resolved. https://www.cloudflarestatus.com/incidents/k9ppxftx8bs5

Cloudflare incident disrupting Klaviyo

Dec <var data-var='date'> 3</var>, <var data-var='time'>15:36</var> EST Resolved - Monitoring is complete, and this incident has been resolved. We appreciate your patience throughout this incident.Dec <var data-var='date'> 3</var>, <var data-var='time'>15:21</var> EST Monitoring - We successfully reverted the change and have confirmed that Customer Agent Web Chat follow-up prompts are sending as expected. We will continue to monitor to ensure there is no further impact.Dec <var data-var='date'> 3</var>, <var data-var='time'>15:08</var> EST Identified - As of 3:00 PM US/Eastern, we confirmed this issue is only impacted Web Chat. Customer Agent via SMS chat is not impacted. We have identified a recent change as the root cause and will be reverting this shortly. We continue to monitor closely and appreciate your patience throughout this incident.Dec <var data-var='date'> 3</var>, <var data-var='time'>14:57</var> EST Investigating - We are currently investigating an issue impacting Customer Agent follow-up prompts beginning around 11:20 AM US/Eastern. Follow-up prompts are not appearing after replies from the AI Agent. This prevents end users from continuing the conversation or escalating to a human agent. We'll provide updates as more information is available.

Customer Agent Follow Up Prompts not Appearing

Nov <var data-var='date'>28</var>, <var data-var='time'>17:05</var> EST Resolved - This incident has been resolved.Nov <var data-var='date'>28</var>, <var data-var='time'>16:11</var> EST Monitoring - Access to these services (Customer Hub, Helpdesk, and Customer Agent) remains stable. We are continuing to closely monitor these systems.Nov <var data-var='date'>28</var>, <var data-var='time'>15:46</var> EST Identified - Starting at 3:40pm (US Eastern), we have restored access to these services (Customer Hub, Helpdesk, and Customer Agent). We continue to closely monitor these systems.Nov <var data-var='date'>28</var>, <var data-var='time'>15:27</var> EST Investigating - Starting at 3:00pm (US Eastern), Klaviyo Helpdesk, Customer Hub, and the onsite web chat functionality of Customer Agent are unavailable. Our team is investigating the issue and will update with progress as soon as possible.

Klaviyo Helpdesk, Customer Hub, and Customer Agent services Outage

Nov <var data-var='date'>18</var>, <var data-var='time'>14:06</var> EST Resolved - This incident has been resolved, as of 2 pm US eastern. All affected components are operational.Nov <var data-var='date'>18</var>, <var data-var='time'>09:34</var> EST Monitoring - Fixes have been implemented for some services and we are monitoring the issues.Nov <var data-var='date'>18</var>, <var data-var='time'>08:58</var> EST Identified - 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.

Cloudflare incident disrupting onsite events

Nov <var data-var='date'>14</var>, <var data-var='time'>17:00</var> EST Completed - The scheduled maintenance has been completed.Nov <var data-var='date'>14</var>, <var data-var='time'>11:00</var> EST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Nov <var data-var='date'>14</var>, <var data-var='time'>09:58</var> EST Scheduled - Between 11:00 AM and 5:00 PM US/Eastern on Friday, November 14, 2025, Klaviyo Engineering will perform maintenance on our events infrastructure. During this maintenance window, event analytics may be delayed up to 45 minutes. No data loss will occur and no other Klaviyo functionality will be impacted.

Analytics Maintenance

Nov <var data-var='date'>13</var>, <var data-var='time'>16:30</var> EST Completed - The scheduled maintenance has been completed.Nov <var data-var='date'>13</var>, <var data-var='time'>10:00</var> EST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Nov <var data-var='date'>13</var>, <var data-var='time'>09:36</var> EST Scheduled - Between 10:00 AM and 5:00 PM US/Eastern on Thursday, November 13, 2025, Klaviyo Engineering will perform maintenance on our events infrastructure. During this maintenance window, event analytics may be delayed up to 45 minutes. No data loss will occur and no other Klaviyo functionality will be impacted.

Nov <var data-var='date'>12</var>, <var data-var='time'>16:00</var> EST Completed - The scheduled maintenance has been completed.Nov <var data-var='date'>12</var>, <var data-var='time'>13:00</var> EST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Nov <var data-var='date'>12</var>, <var data-var='time'>12:01</var> EST Scheduled - Between 1:00 PM and 4:00 PM US/Eastern on Wednesday, November 12, 2025, Klaviyo Engineering will perform maintenance on our events infrastructure. During this maintenance window, event analytics may be delayed up to 45 minutes. No data loss will occur and no other Klaviyo functionality will be impacted.

Nov <var data-var='date'> 2</var>, <var data-var='time'>12:41</var> EST Resolved - The incident is now resolved. All delayed data for Facebook Integrations, which occurred between 1:00 AM and 2:00 AM, has been fully restored.Nov <var data-var='date'> 2</var>, <var data-var='time'>08:13</var> EST Monitoring - A fix has been identified and we are monitoring the results.Nov <var data-var='date'> 2</var>, <var data-var='time'>02:03</var> EST Identified - As of 1:00 AM ET (approximately one hour ago), our Facebook integration sync encountered a failure, resulting in a temporary delay in data sync. We have confirmed that no data has been lost, and the system failure is strictly impacting sync times. The root cause has been successfully identified, and our engineering team is actively working on deploying the necessary fix.

Facebook Ads are not syncing correctly

Oct <var data-var='date'>29</var>, <var data-var='time'>15:43</var> EDT Resolved - This incident has been resolved.Oct <var data-var='date'>29</var>, <var data-var='time'>15:27</var> EDT Monitoring - We have mitigated the delays and we expect SMS event processing to be fully caught up within the next 20 minutes. There was no data loss as a result of this incident.Oct <var data-var='date'>29</var>, <var data-var='time'>15:12</var> EDT Update - We are still working to restore normal processing of SMS events. A subset of customers may see delays of up to 90 minutes at this time. SMS Sending remains unaffected.Oct <var data-var='date'>29</var>, <var data-var='time'>14:27</var> EDT Update - We want to acknowledge that downstream services (Segments and Flows) relying on the SMS events will also be impacted, until the event processing has caught up, which we expect to happen shortly. We'll continue to provide updates as they are available.Oct <var data-var='date'>29</var>, <var data-var='time'>14:16</var> EDT Identified - Starting at 1:00 PM US/Eastern, we began experiencing delays of up to 40 minutes for SMS events processing. SMS Sending is not impacted. We have identified the issue and are in the process of reverting a change to restore normal processing. We'll provide updates as soon as more information is available.

SMS Events Processing Delays

Oct <var data-var='date'>23</var>, <var data-var='time'>20:23</var> EDT Resolved - Between 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 customers' ability to view or test templates as expected. The Engineering team has identified the cause and implemented the fix. We are seeing links redirect as expected.

Template Tag redirecting issue

Oct <var data-var='date'>21</var>, <var data-var='time'>13:06</var> EDT Resolved - All services have been restored and are operating normally. Monitoring is complete, and this incident has been resolved. We appreciate your patience throughout this incident.Oct <var data-var='date'>20</var>, <var data-var='time'>20:31</var> EDT Update - As of 7:32pm EST, we have successfully processed the delayed unsubscribe events and conversion attribution analytics has been restored. We continue to monitor service functionality as repairs have been completed.Oct <var data-var='date'>20</var>, <var data-var='time'>16:45</var> EDT Update - Flow sending is fully caught up and restored to real-time. We continue to process delayed conversion attribution analytics and delayed profile unsubscribes.Oct <var data-var='date'>20</var>, <var data-var='time'>16:21</var> EDT Monitoring - Segmentation processing has been restored to real-time. Segments relying on custom object properties remain delayed and we're continuing to restore normal processing for these. We expect flow sending to be fully caught up within the next hour. We continue to process delayed conversion attribution analytics and delayed profile unsubscribes.Oct <var data-var='date'>20</var>, <var data-var='time'>14:55</var> EDT Identified - A mitigation has been deployed for the issue impacting flow sending. Any delayed messages are now being replayed and flow performance is improving. We will confirm once this has been fully restored. The team continues to work through the segmentation processing delays. We continue to monitor closely and appreciate your patience throughout this incident.Oct <var data-var='date'>20</var>, <var data-var='time'>13:37</var> EDT Update - We are currently experiencing delays in segmentation processing for a subset of users by up to 2.5 hours. We’re working to mitigate these processing delays as quickly as possible.Oct <var data-var='date'>20</var>, <var data-var='time'>12:46</var> EDT Investigating - We are currently investigating an issue impacting flow sending beginning around 12:00 PM US/Eastern. We’ll provide updates as soon as more information is available.Oct <var data-var='date'>20</var>, <var data-var='time'>11:26</var> EDT Update - Segmentation processing has been restored. We continue to work through processing for the delayed analytics and unsubscribes.Oct <var data-var='date'>20</var>, <var data-var='time'>11:09</var> EDT Update - We continue to process delayed conversion attribution analytics and delayed profile unsubscribes. We are currently experiencing delays in segmentation processing for a subset of users by up to 60 minutes. We’re working to mitigate these processing delays as quickly as possible.Oct <var data-var='date'>20</var>, <var data-var='time'>08:39</var> EDT Update - As of 8:30am EST, we have successfully sent the delayed campaign and flow messages. Over the next several hours, we will process delayed conversion attribution analytics and delayed profile unsubscribes. We continue to closely monitor our systems.Oct <var data-var='date'>20</var>, <var data-var='time'>06:41</var> EDT Update - As of 6:15am EST, we are continuing to stabilize our systems and process any actions that were affected by the provider outage, which lasted from approximately 2:50 to 5:30am EST. We are attempting to send any campaigns and flows messages that couldn't be sent during that time. We are also processing events and profile information received during that time. Data from API requests that received an error during the incident were lost. We will continue to share updates as we make progress.Oct <var data-var='date'>20</var>, <var data-var='time'>05:58</var> EDT Monitoring - As of 5:30am EST, the ability to log in and access the Klaviyo app has been restored. Restoration of all functionality and services is in progress. We are actively investigating the state of sending (campaigns, flows). We will continue to monitor services as functionality is repaired and will share updates as we make progress.Oct <var data-var='date'>20</var>, <var data-var='time'>04:58</var> EDT Investigating - Starting around 2:50am EST, due to outages with an upstream provider, several services in Klaviyo including log-in and sending are inaccessible. We'll provide updates as soon as more information is available.

Widespread Access Outage

Oct <var data-var='date'> 2</var>, <var data-var='time'>13:59</var> EDT Resolved - This incident has been resolved.Oct <var data-var='date'> 2</var>, <var data-var='time'>13:43</var> EDT Monitoring - From 1:17 PM to 1:32 PM US/Eastern on 10/2/25, we experienced an issue that resulted in errors accessing the Klaviyo app, disruption in event ingestion, and issues submitting signup forms. A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.

Klaviyo App Access Issues

Sep <var data-var='date'>30</var>, <var data-var='time'>22:31</var> EDT Resolved - This incident has been resolved.Sep <var data-var='date'>30</var>, <var data-var='time'>22:16</var> EDT Monitoring - We are currently monitoring an issue that was impacting subscribe and unsubscribe pages for all profiles. This may have prevented profiles from opting in or out of marketing communications. We'll provide updates as soon as more information is available.

Consent pages

Sep <var data-var='date'>29</var>, <var data-var='time'>09:27</var> EDT Resolved - This incident has been resolved.Sep <var data-var='date'>22</var>, <var data-var='time'>15:43</var> EDT Monitoring - We have concluded our repairs and these campaigns should now show in the campaign list view as expected. We continue to monitor closely and appreciate your patience throughout this incident.Sep <var data-var='date'>19</var>, <var data-var='time'>17:50</var> EDT Identified - We're continuing to work through repairs for this subset of campaigns. We'll provide updates as soon as more information is available. We appreciate your patience throughout this incident.Sep <var data-var='date'>19</var>, <var data-var='time'>09:38</var> EDT Investigating - We are currently investigating an issue where a subset of scheduled and draft campaigns may not be appearing in the campaign list view as expected. We are actively investigating. We’ll provide updates as soon as more information is available.

Campaigns List View

Sep <var data-var='date'>19</var>, <var data-var='time'>16:24</var> EDT Resolved - This incident has been resolved.Sep <var data-var='date'>19</var>, <var data-var='time'>14:42</var> EDT Monitoring - Event processing has been restored to real-time. There was no data loss as a result of this incident. We’re continuing to monitor and will post another update once we have fully cleared any backlog of processing data.Sep <var data-var='date'>19</var>, <var data-var='time'>13:07</var> EDT Update - A fix has been implemented and we are monitoring the results. We expect real time event processing to be fully restored within 1 hour.Sep <var data-var='date'>19</var>, <var data-var='time'>10:38</var> EDT Identified - At around 7 AM Eastern time, we began experiencing delays in real-time event processing. Events may be out of date by up to 3 hours. Flows, Segments, Profiles, Reporting, as well as segment-targeted forms, may be impacted. We are actively working to restore real-time processing and will continue to provide updates here.

Delay in Real-Time Event Processing

Sep <var data-var='date'>16</var>, <var data-var='time'>17:21</var> EDT Resolved - This incident has been resolved.Sep <var data-var='date'>16</var>, <var data-var='time'>17:17</var> EDT Monitoring - A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.Sep <var data-var='date'>16</var>, <var data-var='time'>17:05</var> EDT Identified - Starting 3:50pm US/Eastern on 9/16/25, we began observing delays in event-triggered flows. Users may see delays of up to 60 minutes. We're currently working on a fix. We’ll provide updates as soon as more information is available.

Event-triggered flow delays

Sep <var data-var='date'> 3</var>, <var data-var='time'>18:56</var> EDT Resolved - This incident has been resolved.Sep <var data-var='date'> 3</var>, <var data-var='time'>18:41</var> EDT Monitoring - We have identified the root cause and have mitigated any further incorrect resends of omnichannel campaigns. We continue to monitor closely and appreciate your patience throughout this incident.Sep <var data-var='date'> 3</var>, <var data-var='time'>17:32</var> EDT Investigating - We are currently investigating an issue where omnichannel campaigns were resent unexpectedly. We'll provide updates as soon as more information is available.

Omnichannel Campaign Resends

Sep <var data-var='date'> 3</var>, <var data-var='time'>09:08</var> EDT Resolved - Real-time segmentation is processing in real-time, and the incident has been resolved.Sep <var data-var='date'> 3</var>, <var data-var='time'>08:46</var> EDT Identified - We have identified a root cause and are implementing a fix. We do not currently have an estimate for when processing will be back to real-time. We will post another update once a timeline is available.Sep <var data-var='date'> 3</var>, <var data-var='time'>05:53</var> EDT Investigating - We are currently experiencing delays in real-time segment processing. Segments may be out of date by up to 3 hours. Flows triggered by segments, as well as segment-targeted forms, may be impacted. We are actively working to restore real-time processing and will continue to provide updates here.

Aug <var data-var='date'>27</var>, <var data-var='time'>11:26</var> EDT Resolved - Between 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.

Aug <var data-var='date'>12</var>, <var data-var='time'>13:14</var> EDT Resolved - This is now resolved, triggering is back to real-time.Aug <var data-var='date'>12</var>, <var data-var='time'>13:05</var> EDT Monitoring - Triggering of event-based flows is now back to real-time. We're continuing to monitor and will provide an additional confirmation of full recovery.Aug <var data-var='date'>12</var>, <var data-var='time'>12:39</var> EDT Investigating - We are currently investigating delays in the triggering of event-based flows, which began around 08/12/2025 at 11:45 US/Eastern. Our team is actively working to resolve the issue. Further updates will be provided as soon as new information is available.

Is Klaviyo down?

Klaviyo status is UP

Lastest published events

Real-time segmentation delays

Issues with Campaign Sending and Scheduling

Users with access to multiple accounts being unable to switch accounts

Klaviyo Services, Components and Regions

Recent Klaviyo events

Real-time segmentation delays

Issues with Campaign Sending and Scheduling

Users with access to multiple accounts being unable to switch accounts

Data processing delays

Template Cloning Functionality

Cloudflare incident disrupting Klaviyo

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Is Klaviyo down?

Klaviyo status is UP

Lastest published events

Real-time segmentation delays

Issues with Campaign Sending and Scheduling

Users with access to multiple accounts being unable to switch accounts

Klaviyo Services, Components and Regions

Recent Klaviyo events

Real-time segmentation delays

Issues with Campaign Sending and Scheduling

Users with access to multiple accounts being unable to switch accounts

Data processing delays

Template Cloning Functionality

Cloudflare incident disrupting Klaviyo

Get your FREE account now,5 monitors included!

Get your FREE account now,
5 monitors included!