Issues loading Notes
Affected: Substack.com
Timeline · 2 updates
- investigating Aug 18, 2026, 04:23 AM UTC
We are currently investigating this issue.
- resolved Aug 18, 2026, 04:54 AM UTC
This incident has been resolved.
Substack Outage History
Substack is up right nowSubstack had 18 outages in the last 2 years totaling 1127h 55m of downtime — averaging 0.7 incidents per month.
There were 18 Substack outages since August 26, 2025 totaling 1127h 55m of downtime. Each is summarised below — incident details, duration, and resolution information.
Issues loading media on Substack
Affected: Substack.com
Timeline · 3 updates
- investigating Jul 16, 2026, 10:06 AM UTC
We're aware of an issue affecting how some media loads on Substack (particularly images).
- monitoring Jul 16, 2026, 11:22 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jul 16, 2026, 04:01 PM UTC
This incident has been resolved.
Delays in post delivery
Affected: Email delivery
Timeline · 3 updates
- 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.
- monitoring Jun 03, 2026, 02:16 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 03, 2026, 02:50 PM UTC
This incident has been resolved.
Service degraded due to a provider.
Affected: Substack publicationsWriter dashboardsEmail deliverySubscription invoice processingSubstack.comPush NotificationsCustom domains
Timeline · 4 updates
- investigating Apr 22, 2026, 07:12 PM UTC
We are experiencing an issue with a provider.
- identified Apr 22, 2026, 07:36 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Apr 22, 2026, 07:45 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Apr 22, 2026, 08:48 PM UTC
This incident has been resolved.
Issue with reported open rates
Affected: Email delivery
Timeline · 2 updates
- 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.
- resolved May 11, 2026, 05:55 PM UTC
This incident has been resolved.
We're aware of an issue causing delays in publisher stats
Affected: Writer dashboards
Timeline · 2 updates
- identified Feb 27, 2026, 12:41 AM UTC
The issue has been identified and a fix is being implemented.
- resolved Feb 27, 2026, 03:35 AM UTC
This incident has been resolved.
Publisher Stats Loading
Affected: Writer dashboards
Timeline · 3 updates
- investigating Feb 26, 2026, 11:10 PM UTC
We're aware of an issue affecting loading publisher stats
- identified Feb 26, 2026, 11:40 PM UTC
The issue has been identified and a fix is being implemented.
- resolved Feb 26, 2026, 11:43 PM UTC
This incident has been resolved.
Substack Availability Issues
Affected: Substack publicationsWriter dashboardsSubstack.com
Timeline · 4 updates
- investigating Feb 12, 2026, 11:25 PM UTC
We are currently investigating this issue.
- identified Feb 12, 2026, 11:42 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Feb 12, 2026, 11:43 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Feb 13, 2026, 12:31 AM UTC
This incident has been resolved.
Elevated latencies
Timeline · 3 updates
- investigating Jan 14, 2026, 05:38 PM UTC
Substack is experiencing elevated latencies. We are working to investigate the issue.
- monitoring Jan 14, 2026, 07:25 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jan 14, 2026, 08:47 PM UTC
This incident has been resolved.
Delays in audio read-aloud processing.
Timeline · 2 updates
- investigating Jan 05, 2026, 05:17 PM UTC
We're experiencing a delay in processing the automated read-alouds for posts in the apps.
- resolved Jan 06, 2026, 05:36 AM UTC
This incident has been resolved.
Substack is experiencing issues
Affected: Substack.com
Timeline · 3 updates
- investigating Dec 22, 2025, 11:31 PM UTC
We are currently observing increased latency on Substack surfaces and are investigating the issue.
- monitoring Dec 22, 2025, 11:52 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Dec 23, 2025, 12:13 AM UTC
This incident has been resolved.
Push notifications delayed on iOS
Affected: Push Notifications
Timeline · 3 updates
- identified Nov 05, 2025, 04:52 PM UTC
We are experiencing delays due to a service provider outage.
- monitoring Nov 05, 2025, 05:29 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Nov 05, 2025, 05:38 PM UTC
This incident has been resolved.
Post emails delayed
Affected: Email delivery
Timeline · 6 updates
- 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.
- 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.
- 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.
- 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.
- monitoring Oct 20, 2025, 09:50 PM UTC
Scheduled post sends are operational and we have caught up with the backlog.
- resolved Oct 21, 2025, 12:52 AM UTC
This incident has been resolved.
Post notifications are delayed
Affected: Email deliveryPush Notifications
Timeline · 4 updates
- investigating Oct 04, 2025, 04:06 PM UTC
We are experiencing delays in sending out email and push notifications for published posts.
- identified Oct 04, 2025, 04:25 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Oct 04, 2025, 07:22 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Oct 04, 2025, 08:29 PM UTC
This incident has been resolved.
Post email delivery is delayed
Affected: Email delivery
Timeline · 3 updates
- investigating Sep 20, 2025, 02:42 PM UTC
We are currently investigating this issue.
- monitoring Sep 20, 2025, 04:08 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 20, 2025, 04:25 PM UTC
This incident has been resolved.
Substack experiencing increased latency
Affected: Substack publicationsWriter dashboardsEmail deliverySubstack.comCustom domains
Timeline · 10 updates
Delay in sending scheduled posts
Affected: Email delivery
Timeline · 3 updates
- identified Aug 30, 2025, 04:17 PM UTC
We are investigating a delay in the sending of scheduled posts.
- monitoring Aug 30, 2025, 04:30 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Aug 30, 2025, 04:32 PM UTC
This incident has been resolved.
Livestream creation not working
Timeline · 2 updates
- 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.
- resolved Aug 26, 2025, 02:45 PM UTC
This incident has been resolved.