Substack incident

Increased error rates

Major Resolved View vendor source →

Substack experienced a major incident on April 29, 2025 affecting Substack publications and Writer dashboards and 1 more component, lasting 1h 1m. The incident has been resolved; the full update timeline is below.

Started
Apr 29, 2025, 06:15 PM UTC
Resolved
Apr 29, 2025, 07:16 PM UTC
Duration
1h 1m
Detected by Pingoru
Apr 29, 2025, 06:15 PM UTC

Affected components

Substack publicationsWriter dashboardsEmail deliverySubscription invoice processingSubstack.comPush NotificationsCustom domains

Update timeline

  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.