Resolved after 3 hours 47 minutes, affecting Substack publications and Writer dashboards and 1 more, on September 15, 2025.
Substack is operating normally and our team is monitoring.
Affected components
Update timeline
- investigating Sep 15, 2025, 03:24 PM UTC
We are currently investigating reports of increased latency and slow response times across Substack.
- investigating Sep 15, 2025, 03:34 PM UTC
We are continuing to investigate increased latency and error rates across Substack.
- identified Sep 15, 2025, 03:42 PM UTC
We have identified an issue and are seeing normal performance across all systems.
- identified Sep 15, 2025, 03:50 PM UTC
We are continuing to investigate increased latency and error rates across Substack.
- identified Sep 15, 2025, 04:38 PM UTC
We are working to resolve the remaining performance issues across Substack and expect to see recovery shortly.
- monitoring Sep 15, 2025, 04:46 PM UTC
We are seeing recovery of performance across Substack and are monitoring the issue.
- monitoring Sep 15, 2025, 04:53 PM UTC
As part of the earlier incident, we are noting delays in analytics updating and post email delivery. We are working to resolve the issue.
- identified Sep 15, 2025, 05:43 PM UTC
We are seeing recurrence of increased error rates and degraded performance across Substack.
- monitoring Sep 15, 2025, 06:39 PM UTC
Substack is operating normally and our team is monitoring.
- resolved Sep 15, 2025, 07:12 PM UTC
This incident has been resolved.
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