# Substack in October 2025: incidents, uptime and changes

> Substack in October 2025: 2 incidents on its status page (1 major or critical), 98.49% free of major or critical incidents (vendor-reported). From Rewindex’s archive of Substack’s status, pricing and policy pages.

Canonical: https://rewindex.com/company/substack/2025/10
Last updated: 2025-11-01T00:00:00Z

- Incidents posted: 2 (major/critical: 1) · Maintenance: 1
- By vendor impact label: major 1, minor 1
- Uptime (vendor-reported): 98.49% free of major/critical incidents, 97.90% free of any incident; outage time 11 h 11 min, incident time 15 h 34 min
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [September 2025](https://rewindex.com/company/substack/2025/09.md) · Next: [November 2025](https://rewindex.com/company/substack/2025/11.md) · [All months](https://rewindex.com/company/substack/reports.md) · [Substack](https://rewindex.com/company/substack.md)

_Uptime: Derived from the incidents the vendor posted on its own status page, not measured by us. A minute counts as an outage minute when a major or critical incident (as the vendor labelled it) was open; incident minutes include minor ones too. Maintenance and incidents marked "no impact" are left out, overlapping incidents are merged, a resolved incident counts for at most 7 days, and one still open with no resolution counts for at most 24 hours._

## Major and critical incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Post emails delayed](https://rewindex.com/company/substack/incidents/tj9vz6w9v8qc.md) | major | 2025-10-20 13:41 UTC | 2025-10-21 00:52 UTC | 11 h | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Post notifications are delayed](https://rewindex.com/company/substack/incidents/26p3hqgktw0p.md) | minor | 2025-10-04 16:06 UTC | 2025-10-04 20:29 UTC | 4.4 h | resolved |
| [Post emails delayed](https://rewindex.com/company/substack/incidents/tj9vz6w9v8qc.md) | major | 2025-10-20 13:41 UTC | 2025-10-21 00:52 UTC | 11 h | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] Scheduled database maintenance](https://rewindex.com/company/substack/incidents/ghknzgg6v7r4.md) | maintenance | 2025-10-04 03:00 UTC | 2025-10-04 04:23 UTC | 1.4 h | resolved |

## Cite this

Substack posted 2 status incidents in October 2025 (1 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/substack/2025/10
- Citation: Substack, “Substack in October 2025” (2025-10-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/substack/2025/10 (CC BY 4.0).
- Markdown link: `[Substack: Substack in October 2025 (2025-10-01)](https://rewindex.com/company/substack/2025/10)`


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Canonical: https://rewindex.com/company/substack/2025/10 · Markdown: https://rewindex.com/company/substack/2025/10.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T10:18:29.409Z