Companies / Substack / incidents
Substack: Increased error rates
Substack reported a major incident with increased error rates and system-wide performance degradation affecting publications, writer dashboards, Substack.com, the app, and post editor. It started at 2025-04-29 18:15 UTC and was resolved at 2025-04-29 19:16 UTC, lasting 1 h 1 min; full recovery was reported at 18:41 UTC.
Machine-written from the archived incident (Sol). Check the timeline before relying on it.
Affected components: Writer dashboardsEmail deliveryPush NotificationsSubscription invoice processingSubstack publicationsSubstack.comCustom domains
Timeline of updates
- investigating
We are currently investigating this issue.
- investigating
This issue is causing performance degradation across the system.
- investigating
The website is down.
- 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.
- identified
We are beginning to see recovery across Substack and error rates are returning the normal levels.
- identified
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.
- monitoring
We are seeing full recovery across Substack and our team is now monitoring.
- resolved
This incident has been resolved.
Rewindex changes for this incident
- Major incident: Increased error rates 2025-04-29 18:15 UTC
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Substack profile · Recent Substack incidents · Markdown · JSON