Substack Outage History

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Substack had 43 outages in the last 2 years totaling 1173h 58m of downtime — averaging 1.8 incidents per month.

There were 43 Substack outages since June 18, 2024 totaling 1173h 58m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://substack.statuspage.io

Notice June 3, 2026

Delays in post delivery

Detected by Pingoru
Jun 03, 2026, 01:58 PM UTC
Resolved
Jun 03, 2026, 02:50 PM UTC
Duration
52m
Affected: Email delivery
Timeline · 3 updates
  1. investigating Jun 03, 2026, 01:58 PM UTC

    We are experiencing delays in post email delivery due to an outage from a third party service provider.

  2. monitoring Jun 03, 2026, 02:16 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Jun 03, 2026, 02:50 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice April 22, 2026

Service degraded due to a provider.

Detected by Pingoru
Apr 22, 2026, 07:12 PM UTC
Resolved
Apr 22, 2026, 08:48 PM UTC
Duration
1h 36m
Affected: Substack publicationsWriter dashboardsEmail deliverySubscription invoice processingSubstack.comPush NotificationsCustom domains
Timeline · 4 updates
  1. investigating Apr 22, 2026, 07:12 PM UTC

    We are experiencing an issue with a provider.

  2. identified Apr 22, 2026, 07:36 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Apr 22, 2026, 07:45 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Apr 22, 2026, 08:48 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice March 27, 2026

Issue with reported open rates

Detected by Pingoru
Mar 27, 2026, 10:20 PM UTC
Resolved
May 11, 2026, 05:55 PM UTC
Duration
44d 19h
Affected: Email delivery
Timeline · 2 updates
  1. investigating Mar 27, 2026, 10:20 PM UTC

    We’re investigating an issue affecting reported open rates for some publishers. Current evidence suggests this is related to how Gmail loads tracking pixels, and does not indicate a change in engagement or deliverability. We take responsibility for ensuring these metrics are accurate and are prioritizing improvements to our open rate tracking so this is resolved as quickly as possible. We will continue to provide updates here as we learn more.

  2. resolved May 11, 2026, 05:55 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor February 26, 2026

Publisher Stats Loading

Detected by Pingoru
Feb 26, 2026, 11:10 PM UTC
Resolved
Feb 26, 2026, 11:43 PM UTC
Duration
32m
Affected: Writer dashboards
Timeline · 3 updates
  1. investigating Feb 26, 2026, 11:10 PM UTC

    We're aware of an issue affecting loading publisher stats

  2. identified Feb 26, 2026, 11:40 PM UTC

    The issue has been identified and a fix is being implemented.

  3. resolved Feb 26, 2026, 11:43 PM UTC

    This incident has been resolved.

Read the full incident report →

Major February 12, 2026

Substack Availability Issues

Detected by Pingoru
Feb 12, 2026, 11:25 PM UTC
Resolved
Feb 13, 2026, 12:31 AM UTC
Duration
1h 5m
Affected: Substack publicationsWriter dashboardsSubstack.com
Timeline · 4 updates
  1. investigating Feb 12, 2026, 11:25 PM UTC

    We are currently investigating this issue.

  2. identified Feb 12, 2026, 11:42 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Feb 12, 2026, 11:43 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Feb 13, 2026, 12:31 AM UTC

    This incident has been resolved.

Read the full incident report →

Notice January 15, 2026

Issues loading Notes

Detected by Pingoru
Jan 15, 2026, 12:35 PM UTC
Resolved
Jan 15, 2026, 12:50 PM UTC
Duration
14m
Affected: Substack.com
Timeline · 3 updates
  1. investigating Jan 15, 2026, 12:35 PM UTC

    We're currently investigating an issue affecting load times of notes and inboxes

  2. monitoring Jan 15, 2026, 12:47 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Jan 15, 2026, 12:50 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice January 14, 2026

Elevated latencies

Detected by Pingoru
Jan 14, 2026, 05:38 PM UTC
Resolved
Jan 14, 2026, 08:47 PM UTC
Duration
3h 8m
Timeline · 3 updates
  1. investigating Jan 14, 2026, 05:38 PM UTC

    Substack is experiencing elevated latencies. We are working to investigate the issue.

  2. monitoring Jan 14, 2026, 07:25 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Jan 14, 2026, 08:47 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice January 5, 2026

Delays in audio read-aloud processing.

Detected by Pingoru
Jan 05, 2026, 05:17 PM UTC
Resolved
Jan 06, 2026, 05:36 AM UTC
Duration
12h 19m
Timeline · 2 updates
  1. investigating Jan 05, 2026, 05:17 PM UTC

    We're experiencing a delay in processing the automated read-alouds for posts in the apps.

  2. resolved Jan 06, 2026, 05:36 AM UTC

    This incident has been resolved.

Read the full incident report →

Minor December 22, 2025

Substack is experiencing issues

Detected by Pingoru
Dec 22, 2025, 11:31 PM UTC
Resolved
Dec 23, 2025, 12:13 AM UTC
Duration
41m
Affected: Substack.com
Timeline · 3 updates
  1. investigating Dec 22, 2025, 11:31 PM UTC

    We are currently observing increased latency on Substack surfaces and are investigating the issue.

  2. monitoring Dec 22, 2025, 11:52 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Dec 23, 2025, 12:13 AM UTC

    This incident has been resolved.

Read the full incident report →

Notice November 5, 2025

Push notifications delayed on iOS

Detected by Pingoru
Nov 05, 2025, 04:52 PM UTC
Resolved
Nov 05, 2025, 05:38 PM UTC
Duration
46m
Affected: Push Notifications
Timeline · 3 updates
  1. identified Nov 05, 2025, 04:52 PM UTC

    We are experiencing delays due to a service provider outage.

  2. monitoring Nov 05, 2025, 05:29 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Nov 05, 2025, 05:38 PM UTC

    This incident has been resolved.

Read the full incident report →

Major October 20, 2025

Post emails delayed

Detected by Pingoru
Oct 20, 2025, 01:41 PM UTC
Resolved
Oct 21, 2025, 12:52 AM UTC
Duration
11h 11m
Affected: Email delivery
Timeline · 6 updates
  1. investigating Oct 20, 2025, 01:41 PM UTC

    We are experiencing delays with processing scheduled posts related to an outage from one of our service providers. Our team is investigating.

  2. investigating Oct 20, 2025, 01:49 PM UTC

    We are also seeing issues with publication dashboards including partial outages across the subscriber tab and some statistics. We are working to mitigate.

  3. identified Oct 20, 2025, 02:12 PM UTC

    We are seeing recovery of our publisher dashboard functionality. Other service functions such as scheduled posts continue to be degraded.

  4. identified Oct 20, 2025, 04:51 PM UTC

    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.

  5. monitoring Oct 20, 2025, 09:50 PM UTC

    Scheduled post sends are operational and we have caught up with the backlog.

  6. resolved Oct 21, 2025, 12:52 AM UTC

    This incident has been resolved.

Read the full incident report →

Minor October 4, 2025

Post notifications are delayed

Detected by Pingoru
Oct 04, 2025, 04:06 PM UTC
Resolved
Oct 04, 2025, 08:29 PM UTC
Duration
4h 22m
Affected: Email deliveryPush Notifications
Timeline · 4 updates
  1. investigating Oct 04, 2025, 04:06 PM UTC

    We are experiencing delays in sending out email and push notifications for published posts.

  2. identified Oct 04, 2025, 04:25 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Oct 04, 2025, 07:22 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Oct 04, 2025, 08:29 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice September 20, 2025

Post email delivery is delayed

Detected by Pingoru
Sep 20, 2025, 02:42 PM UTC
Resolved
Sep 20, 2025, 04:25 PM UTC
Duration
1h 42m
Affected: Email delivery
Timeline · 3 updates
  1. investigating Sep 20, 2025, 02:42 PM UTC

    We are currently investigating this issue.

  2. monitoring Sep 20, 2025, 04:08 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Sep 20, 2025, 04:25 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice August 30, 2025

Delay in sending scheduled posts

Detected by Pingoru
Aug 30, 2025, 04:17 PM UTC
Resolved
Aug 30, 2025, 04:32 PM UTC
Duration
15m
Affected: Email delivery
Timeline · 3 updates
  1. identified Aug 30, 2025, 04:17 PM UTC

    We are investigating a delay in the sending of scheduled posts.

  2. monitoring Aug 30, 2025, 04:30 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Aug 30, 2025, 04:32 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice August 26, 2025

Livestream creation not working

Detected by Pingoru
Aug 26, 2025, 02:06 PM UTC
Resolved
Aug 26, 2025, 02:45 PM UTC
Duration
38m
Timeline · 2 updates
  1. investigating Aug 26, 2025, 02:06 PM UTC

    We are experiencing an issue with a service provider that is causing livestream creation to be broken.

  2. resolved Aug 26, 2025, 02:45 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice August 11, 2025

Unable to sign in on the Android app

Detected by Pingoru
Aug 11, 2025, 04:15 PM UTC
Resolved
Aug 11, 2025, 04:35 PM UTC
Duration
19m
Timeline · 3 updates
  1. investigating Aug 11, 2025, 04:15 PM UTC

    We are currently investigating this issue.

  2. monitoring Aug 11, 2025, 04:27 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Aug 11, 2025, 04:35 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor June 23, 2025

Substack Availability Issue

Detected by Pingoru
Jun 23, 2025, 05:45 PM UTC
Resolved
Jun 24, 2025, 05:19 AM UTC
Duration
11h 33m
Affected: Substack publicationsWriter dashboardsEmail deliverySubscription invoice processingSubstack.comPush NotificationsCustom domains
Timeline · 5 updates
  1. investigating Jun 23, 2025, 05:45 PM UTC

    We are currently investigating a higher error rate when trying to load Substack

  2. identified Jun 23, 2025, 05:51 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Jun 23, 2025, 06:04 PM UTC

    Restored functionality on Substack.com and app. We are continuing to work on a fix for some delays in email delivery.

  4. monitoring Jun 23, 2025, 06:14 PM UTC

    Continuing to bring systems back online. Writer dashboard stats including open rates may be delayed or temporarily inaccurate.

  5. resolved Jun 24, 2025, 05:19 AM UTC

    This incident has been resolved.

Read the full incident report →

Minor April 30, 2025

Email analytics backup

Detected by Pingoru
Apr 30, 2025, 01:31 PM UTC
Resolved
May 02, 2025, 01:21 AM UTC
Duration
1d 11h
Affected: Writer dashboards
Timeline · 5 updates
  1. investigating Apr 30, 2025, 01:31 PM UTC

    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.

  2. identified Apr 30, 2025, 02:21 PM UTC

    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.

  3. identified May 01, 2025, 04:15 AM UTC

    Our engineers are backfilling missing data from the impacted time period. We'll continue to update the incident as that process completes.

  4. identified May 01, 2025, 11:47 PM UTC

    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.

  5. resolved May 02, 2025, 01:21 AM UTC

    All email analytics should be up to date.

Read the full incident report →

Major April 29, 2025

Increased error rates

Detected by Pingoru
Apr 29, 2025, 06:15 PM UTC
Resolved
Apr 29, 2025, 07:16 PM UTC
Duration
1h 1m
Affected: Substack publicationsWriter dashboardsEmail deliverySubscription invoice processingSubstack.comPush NotificationsCustom domains
Timeline · 8 updates
  1. investigating Apr 29, 2025, 05:03 PM UTC

    We are currently investigating this issue.

  2. investigating Apr 29, 2025, 05:49 PM UTC

    This issue is causing performance degradation across the system.

  3. investigating Apr 29, 2025, 05:52 PM UTC

    The website is down.

  4. identified Apr 29, 2025, 06:03 PM UTC

    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.

  5. identified Apr 29, 2025, 06:11 PM UTC

    We are beginning to see recovery across Substack and error rates are returning the normal levels.

  6. identified Apr 29, 2025, 06:15 PM UTC

    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.

  7. monitoring Apr 29, 2025, 06:41 PM UTC

    We are seeing full recovery across Substack and our team is now monitoring.

  8. resolved Apr 29, 2025, 07:16 PM UTC

    This incident has been resolved.

Read the full incident report →

Major March 24, 2025

Errors loading notes feed

Detected by Pingoru
Mar 24, 2025, 11:41 PM UTC
Resolved
Mar 25, 2025, 12:09 AM UTC
Duration
28m
Affected: Substack.com
Timeline · 3 updates
  1. identified Mar 24, 2025, 11:41 PM UTC

    We have identified an issue preventing users from loading the notes feed and are implementing a fix

  2. monitoring Mar 25, 2025, 12:02 AM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Mar 25, 2025, 12:09 AM UTC

    This incident has been resolved.

Read the full incident report →

Minor March 11, 2025

Email delivery delays

Detected by Pingoru
Mar 11, 2025, 04:43 PM UTC
Resolved
Mar 11, 2025, 05:35 PM UTC
Duration
51m
Affected: Email delivery
Timeline · 4 updates
  1. investigating Mar 11, 2025, 04:43 PM UTC

    We are investigating reports of delayed email delivery for posts published on Substack.

  2. identified Mar 11, 2025, 04:52 PM UTC

    We have identified the cause of the email delays and are working to resolve.

  3. monitoring Mar 11, 2025, 04:57 PM UTC

    The issue causing delays to email delivery on posts has been addressed.

  4. resolved Mar 11, 2025, 05:35 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor February 28, 2025

Publisher Dashboard and Notifications are experiencing slowdowns

Detected by Pingoru
Feb 28, 2025, 11:43 PM UTC
Resolved
Mar 01, 2025, 12:28 AM UTC
Duration
45m
Affected: Writer dashboardsSubstack.com
Timeline · 4 updates
  1. investigating Feb 28, 2025, 11:43 PM UTC

    Publisher Dashboard and Notifications are experiencing slowdowns. We are investigating the cause.

  2. identified Feb 28, 2025, 11:45 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Feb 28, 2025, 11:56 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Mar 01, 2025, 12:28 AM UTC

    This incident has been resolved.

Read the full incident report →

Major February 3, 2025

Substack home page and app home tab errors

Detected by Pingoru
Feb 03, 2025, 07:25 PM UTC
Resolved
Feb 03, 2025, 08:49 PM UTC
Duration
1h 24m
Affected: Substack.com
Timeline · 6 updates
  1. investigating Feb 03, 2025, 07:25 PM UTC

    We are investigating reports of Notes not loading on the Substack homepage.

  2. investigating Feb 03, 2025, 07:29 PM UTC

    We have identified an issue causing increased errors from the Substack web destination as well as the home tab of the Substack app. We are working to resolve.

  3. identified Feb 03, 2025, 07:37 PM UTC

    We have identified the issue and we're working to resolve the errors from the Substack.com home page and Substack app home tab.

  4. identified Feb 03, 2025, 08:14 PM UTC

    We are continuing to work to resolve the increased error rate from the Substack home page and Substack app home tab. Some Substack users may not see Notes in your feed while we work to restore service.

  5. monitoring Feb 03, 2025, 08:31 PM UTC

    We have restored the feed for all users on Substack.com and in the Substack app home tab and have seen error rates subside. We are continuing to monitor.

  6. resolved Feb 03, 2025, 08:49 PM UTC

    This incident has been resolved.

Read the full incident report →