# Substack in August 2021: incidents, uptime and changes

> Substack in August 2021: 2 incidents on its status page (1 major or critical), 99.93% 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/2021/08
Last updated: 2021-09-01T00:00:00Z

- Incidents posted: 2 (major/critical: 1) · Maintenance: 1
- By vendor impact label: critical 1, minor 1
- Uptime (vendor-reported): 99.93% free of major/critical incidents, 99.67% free of any incident; outage time 27 min, incident time 2 h 26 min
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [July 2021](https://rewindex.com/company/substack/2021/07.md) · Next: [September 2021](https://rewindex.com/company/substack/2021/09.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 |
| --- | --- | --- | --- | --- | --- |
| [Main website down](https://rewindex.com/company/substack/incidents/q6b41hzm18qs.md) | critical | 2021-08-13 20:03 UTC | 2021-08-13 20:30 UTC | 27 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Degraded performance handling images](https://rewindex.com/company/substack/incidents/9pj8d04htxkn.md) | minor | 2021-08-10 23:38 UTC | 2021-08-11 01:37 UTC | 2.0 h | resolved |
| [Main website down](https://rewindex.com/company/substack/incidents/q6b41hzm18qs.md) | critical | 2021-08-13 20:03 UTC | 2021-08-13 20:30 UTC | 27 min | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] Scheduled database maintenance](https://rewindex.com/company/substack/incidents/sdcnmnrwvhlk.md) | maintenance | 2021-08-19 04:47 UTC | 2021-08-19 06:02 UTC | 1.3 h | resolved |

## Cite this

Substack posted 2 status incidents in August 2021 (1 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/substack/2021/08
- Citation: Substack, “Substack in August 2021” (2021-08-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/substack/2021/08 (CC BY 4.0).
- Markdown link: `[Substack: Substack in August 2021 (2021-08-01)](https://rewindex.com/company/substack/2021/08)`


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Canonical: https://rewindex.com/company/substack/2021/08 · Markdown: https://rewindex.com/company/substack/2021/08.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T10:18:04.029Z