# Substack in December 2021: incidents, uptime and changes

> Substack in December 2021: 3 incidents on its status page (1 major or critical), 99.97% 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/2021/12
Last updated: 2022-01-01T00:00:00Z

- Incidents posted: 3 (major/critical: 1) · Maintenance: 1
- By vendor impact label: major 1, minor 2
- Uptime (vendor-reported): 99.97% free of major/critical incidents, 97.48% free of any incident; outage time 13 min, incident time 18 h 43 min
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [November 2021](https://rewindex.com/company/substack/2021/11.md) · Next: [January 2022](https://rewindex.com/company/substack/2022/01.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 |
| --- | --- | --- | --- | --- | --- |
| [Site is down](https://rewindex.com/company/substack/incidents/613hs9xbv9z8.md) | major | 2021-12-20 22:18 UTC | 2021-12-20 22:31 UTC | 13 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Delayed publisher stats](https://rewindex.com/company/substack/incidents/1bm5zwrvmwds.md) | minor | 2021-12-07 17:40 UTC | 2021-12-08 02:37 UTC | 8.9 h | resolved |
| [Site is down](https://rewindex.com/company/substack/incidents/613hs9xbv9z8.md) | major | 2021-12-20 22:18 UTC | 2021-12-20 22:31 UTC | 13 min | resolved |
| [Degraded performance on publication homepages](https://rewindex.com/company/substack/incidents/5j1cvv272t73.md) | minor | 2021-12-22 14:46 UTC | 2021-12-23 00:19 UTC | 9.6 h | resolved |

## Maintenance

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [\[Scheduled\] Scheduled database maintenance](https://rewindex.com/company/substack/incidents/1l860m8lvrmz.md) | maintenance | 2021-12-23 02:00 UTC | 2021-12-23 05:09 UTC | 3.1 h | resolved |

## Cite this

Substack posted 3 status incidents in December 2021 (1 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/substack/2021/12
- Citation: Substack, “Substack in December 2021” (2021-12-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/substack/2021/12 (CC BY 4.0).
- Markdown link: `[Substack: Substack in December 2021 (2021-12-01)](https://rewindex.com/company/substack/2021/12)`


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Canonical: https://rewindex.com/company/substack/2021/12 · Markdown: https://rewindex.com/company/substack/2021/12.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T10:18:06.433Z