# Substack: Major incident: Increased error rates

**Summary:** _summary pending_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-04-29 18:15 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/d33x8f6hwgym](https://stspg.io/d33x8f6hwgym)
- [Company: Substack](https://rewindex.com/company/substack.md)
- Versions: before (none: first archived) → after incident\_version:261/dt9f5z1rt5wg@5cacc2de860c
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Increased error rates
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-04-29 18:15 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-04-29 19:16 UTC
```

**6. Added: Affected components**

```diff
+ Custom domains, Email delivery, Push Notifications, Subscription invoice processing, Substack.com, Substack publications, Writer dashboards
```

**7. Added: Update** (investigating) · 2025-04-29 17:03 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (investigating) · 2025-04-29 17:49 UTC

```diff
+ This issue is causing performance degradation across the system.
```

**9. Added: Update** (investigating) · 2025-04-29 17:52 UTC

```diff
+ The website is down.
```

**10. Added: Update** (identified) · 2025-04-29 18:03 UTC

```diff
+ 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.
```

**11. Added: Update** (identified) · 2025-04-29 18:11 UTC

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

**12. Added: Update** (identified) · 2025-04-29 18:15 UTC

```diff
+ 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.
```

**13. Added: Update** (monitoring) · 2025-04-29 18:41 UTC

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

**14. Added: Update** (resolved) · 2025-04-29 19:16 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-04-29 18:15 UTC | Major incident: Increased error rates (this change) | outage |

All Substack changes: [timeline](https://rewindex.com/company/substack/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i7b561c001c7c1d · Markdown: https://rewindex.com/change/i7b561c001c7c1d.md · JSON: https://rewindex.com/api/v1/changes/i7b561c001c7c1d · Generated 2026-10-18T00:39:31.086Z