Substack Status - Incident History

We're aware of an issue causing delays in publisher stats

2026-02-26T19:35:43-08:00

Feb 26, 19:35 PST
Resolved - This incident has been resolved.

Feb 26, 16:41 PST
Identified - The issue has been identified and a fix is being implemented.

Publisher Stats Loading

2026-02-26T15:43:08-08:00

Feb 26, 15:43 PST
Resolved - This incident has been resolved.

Feb 26, 15:40 PST
Identified - The issue has been identified and a fix is being implemented.

Feb 26, 15:10 PST
Investigating - We're aware of an issue affecting loading publisher stats

Substack Availability Issues

2026-02-12T16:31:20-08:00

Feb 12, 16:31 PST
Resolved - This incident has been resolved.

Feb 12, 15:43 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Feb 12, 15:42 PST
Identified - The issue has been identified and a fix is being implemented.

Feb 12, 15:25 PST
Investigating - We are currently investigating this issue.

Substack Availability Issues

2026-02-11T07:45:15-08:00

Feb 11, 07:45 PST
Resolved - This incident has been resolved.

Feb 11, 07:15 PST
Monitoring - All Substack services have been restored and error rates and latency have returned to normal levels. Our team is continuing to monitor.

Feb 11, 07:10 PST
Update - We have deployed a fix and are continuing to see recovery.

Feb 11, 06:57 PST
Update - We are continuing to work on a fix for this issue.

Feb 11, 06:53 PST
Update - We are continuing to work to restore service. Currently all Substack clients and services are experiencing elevated error rates and degraded performance.

Feb 11, 06:41 PST
Identified - We've identified the issue and are deploying changes to address.

Feb 11, 06:24 PST
Investigating - We are investigating an issue loading substack.com

Issues loading Notes

2026-01-15T04:50:41-08:00

Jan 15, 04:50 PST
Resolved - This incident has been resolved.

Jan 15, 04:47 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Jan 15, 04:35 PST
Investigating - We're currently investigating an issue affecting load times of notes and inboxes

Elevated latencies

2026-01-14T12:47:33-08:00

Jan 14, 12:47 PST
Resolved - This incident has been resolved.

Jan 14, 11:25 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Jan 14, 09:38 PST
Investigating - Substack is experiencing elevated latencies. We are working to investigate the issue.

Delays in audio read-aloud processing.

2026-01-05T21:36:39-08:00

Jan 5, 21:36 PST
Resolved - This incident has been resolved.

Jan 5, 09:17 PST
Investigating - We're experiencing a delay in processing the automated read-alouds for posts in the apps.

Substack is experiencing issues

2025-12-22T16:13:42-08:00

Dec 22, 16:13 PST
Resolved - This incident has been resolved.

Dec 22, 15:52 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Dec 22, 15:31 PST
Investigating - We are currently observing increased latency on Substack surfaces and are investigating the issue.

Substack is experiencing issues

2025-11-18T07:16:51-08:00

Nov 18, 07:16 PST
Resolved - This incident has been resolved.

Nov 18, 06:45 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Nov 18, 06:39 PST
Investigating - We are experiencing issues caused by a service provider, some access to Substack might be limited

Push notifications delayed on iOS

2025-11-05T09:38:35-08:00

Nov 5, 09:38 PST
Resolved - This incident has been resolved.

Nov 5, 09:29 PST
Monitoring - A fix has been implemented and we are monitoring the results.

Nov 5, 08:52 PST
Identified - We are experiencing delays due to a service provider outage.

Post emails delayed

2025-10-20T17:52:59-07:00

Oct 20, 17:52 PDT
Resolved - This incident has been resolved.

Oct 20, 14:50 PDT
Monitoring - Scheduled post sends are operational and we have caught up with the backlog.

Oct 20, 09:51 PDT
Update - We continue to experience delays with processing scheduled posts related to an outage from one of our service providers. Users can publish posts manually to bypass this. Our team is still investigating.

Oct 20, 07:12 PDT
Identified - We are seeing recovery of our publisher dashboard functionality. Other service functions such as scheduled posts continue to be degraded.

Oct 20, 06:49 PDT
Update - We are also seeing issues with publication dashboards including partial outages across the subscriber tab and some statistics. We are working to mitigate.

Oct 20, 06:41 PDT
Investigating - We are experiencing delays with processing scheduled posts related to an outage from one of our service providers. Our team is investigating.

Post notifications are delayed

2025-10-04T13:29:14-07:00

Oct 4, 13:29 PDT
Resolved - This incident has been resolved.

Oct 4, 12:22 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Oct 4, 09:25 PDT
Identified - The issue has been identified and a fix is being implemented.

Oct 4, 09:06 PDT
Investigating - We are experiencing delays in sending out email and push notifications for published posts.

Scheduled database maintenance

2025-10-03T21:23:00-07:00

Oct 3, 21:23 PDT
Completed - The scheduled maintenance has been completed.

Oct 3, 20:00 PDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.

Oct 3, 20:00 PDT
Scheduled - We will be performing a maintenance on the database. Expected downtime is about 2 minutes.

Post email delivery is delayed

2025-09-20T09:25:35-07:00

Sep 20, 09:25 PDT
Resolved - This incident has been resolved.

Sep 20, 09:08 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Sep 20, 07:42 PDT
Investigating - We are currently investigating this issue.

Substack experiencing increased latency

2025-09-15T12:12:06-07:00

Sep 15, 12:12 PDT
Resolved - This incident has been resolved.

Sep 15, 11:39 PDT
Monitoring - Substack is operating normally and our team is monitoring.

Sep 15, 10:43 PDT
Identified - We are seeing recurrence of increased error rates and degraded performance across Substack.

Sep 15, 09:53 PDT
Update - As part of the earlier incident, we are noting delays in analytics updating and post email delivery. We are working to resolve the issue.

Sep 15, 09:46 PDT
Monitoring - We are seeing recovery of performance across Substack and are monitoring the issue.

Sep 15, 09:38 PDT
Update - We are working to resolve the remaining performance issues across Substack and expect to see recovery shortly.

Sep 15, 08:50 PDT
Update - We are continuing to investigate increased latency and error rates across Substack.

Sep 15, 08:42 PDT
Identified - We have identified an issue and are seeing normal performance across all systems.

Sep 15, 08:34 PDT
Update - We are continuing to investigate increased latency and error rates across Substack.

Sep 15, 08:24 PDT
Investigating - We are currently investigating reports of increased latency and slow response times across Substack.

Delay in sending scheduled posts

2025-08-30T09:32:34-07:00

Aug 30, 09:32 PDT
Resolved - This incident has been resolved.

Aug 30, 09:30 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Aug 30, 09:17 PDT
Identified - We are investigating a delay in the sending of scheduled posts.

Livestream creation not working

2025-08-26T07:45:09-07:00

Aug 26, 07:45 PDT
Resolved - This incident has been resolved.

Aug 26, 07:06 PDT
Investigating - We are experiencing an issue with a service provider that is causing livestream creation to be broken.

Unable to sign in on the Android app

2025-08-11T09:35:02-07:00

Aug 11, 09:35 PDT
Resolved - This incident has been resolved.

Aug 11, 09:27 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Aug 11, 09:15 PDT
Investigating - We are currently investigating this issue.

Substack Availability Issue

2025-06-23T22:19:04-07:00

Jun 23, 22:19 PDT
Resolved - This incident has been resolved.

Jun 23, 11:14 PDT
Update - Continuing to bring systems back online. Writer dashboard stats including open rates may be delayed or temporarily inaccurate.

Jun 23, 11:04 PDT
Monitoring - Restored functionality on Substack.com and app. We are continuing to work on a fix for some delays in email delivery.

Jun 23, 10:51 PDT
Identified - The issue has been identified and a fix is being implemented.

Jun 23, 10:45 PDT
Investigating - We are currently investigating a higher error rate when trying to load Substack

Substack Availability Issues

2025-06-23T10:22:08-07:00

Jun 23, 10:22 PDT
Resolved - This incident has been resolved.

Jun 23, 09:57 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Jun 23, 09:56 PDT
Identified - The issue has been identified and a fix is being implemented.

Jun 23, 09:50 PDT
Investigating - We are currently investigating a higher error rate when trying to load Substack

Substack is experiencing issues

2025-05-24T20:18:50-07:00

May 24, 20:18 PDT
Resolved - This incident has been resolved.

May 24, 08:20 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

May 24, 07:47 PDT
Investigating - We are currently investigating this issue.

Email analytics backup

2025-05-01T18:21:49-07:00

May 1, 18:21 PDT
Resolved - All email analytics should be up to date.

May 1, 16:47 PDT
Update - At this time, email delivery statistics are accurate, but we're still in the process of backfilling email open statistics between Tuesday and Wednesday afternoon.

Apr 30, 21:15 PDT
Update - Our engineers are backfilling missing data from the impacted time period. We'll continue to update the incident as that process completes.

Apr 30, 07:21 PDT
Identified - We have identified the issue related to delayed statistics for email deliveries and opens. We are currently processing enqueued events and working toward full recovery.

Apr 30, 06:31 PDT
Investigating - We are experiencing a delay in reader activity statistics relating to email deliveries/opens. Emails continue to send as normal, though their stats are currently delayed.

Increased error rates

2025-04-29T12:16:46-07:00

Apr 29, 12:16 PDT
Resolved - This incident has been resolved.

Apr 29, 11:41 PDT
Monitoring - We are seeing full recovery across Substack and our team is now monitoring.

Apr 29, 11:15 PDT
Update - We are continuing to see recovery. Substack publications, the publisher dashboard, and other functionality are fully recovered. We continue to work on increased error rates across Substack.com, the Substack app, and the post editor.

Apr 29, 11:11 PDT
Update - We are beginning to see recovery across Substack and error rates are returning the normal levels.

Apr 29, 11:03 PDT
Identified - We are experiencing elevated error rates across all Substack applications including publication websites, Substack.com, and the Substack apps. We have identified the issue and we are working toward recovery.

Apr 29, 10:52 PDT
Update - The website is down.

Apr 29, 10:49 PDT
Update - This issue is causing performance degradation across the system.

Apr 29, 10:03 PDT
Investigating - We are currently investigating this issue.

Errors loading notes feed

2025-03-24T17:09:39-07:00

Mar 24, 17:09 PDT
Resolved - This incident has been resolved.

Mar 24, 17:02 PDT
Monitoring - A fix has been implemented and we are monitoring the results.

Mar 24, 16:41 PDT
Identified - We have identified an issue preventing users from loading the notes feed and are implementing a fix

Email delivery delays

2025-03-11T10:35:32-07:00

Mar 11, 10:35 PDT
Resolved - This incident has been resolved.

Mar 11, 09:57 PDT
Monitoring - The issue causing delays to email delivery on posts has been addressed.

Mar 11, 09:52 PDT
Identified - We have identified the cause of the email delays and are working to resolve.

Mar 11, 09:43 PDT
Investigating - We are investigating reports of delayed email delivery for posts published on Substack.