# Substack in March 2021: incidents, uptime and changes

> Substack in March 2021: 4 incidents on its status page (4 major or critical), 99.52% 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/2021/03
Last updated: 2021-04-01T00:00:00Z

- Incidents posted: 4 (major/critical: 4) · Maintenance: 0
- By vendor impact label: critical 2, major 2
- Uptime (vendor-reported): 99.52% free of major/critical incidents, 99.52% free of any incident; outage time 3 h 32 min, incident time 3 h 32 min
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [February 2021](https://rewindex.com/company/substack/2021/02.md) · Next: [April 2021](https://rewindex.com/company/substack/2021/04.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 |
| --- | --- | --- | --- | --- | --- |
| [Substack publication websites not loading](https://rewindex.com/company/substack/incidents/cf80z60rwp94.md) | critical | 2021-03-21 14:44 UTC | 2021-03-21 17:32 UTC | 2.8 h | resolved |
| [Outage](https://rewindex.com/company/substack/incidents/6q3zlrl35ksy.md) | critical | 2021-03-31 14:48 UTC | 2021-03-31 14:59 UTC | 11 min | resolved |
| [Comments not loading](https://rewindex.com/company/substack/incidents/3sdlnzl7mqmv.md) | major | 2021-03-10 15:01 UTC | 2021-03-10 15:34 UTC | 33 min | resolved |
| [Unable to load webpages](https://rewindex.com/company/substack/incidents/m39f83xg9z9y.md) | major | 2021-03-23 15:08 UTC | 2021-03-23 15:08 UTC | 0 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Comments not loading](https://rewindex.com/company/substack/incidents/3sdlnzl7mqmv.md) | major | 2021-03-10 15:01 UTC | 2021-03-10 15:34 UTC | 33 min | resolved |
| [Substack publication websites not loading](https://rewindex.com/company/substack/incidents/cf80z60rwp94.md) | critical | 2021-03-21 14:44 UTC | 2021-03-21 17:32 UTC | 2.8 h | resolved |
| [Unable to load webpages](https://rewindex.com/company/substack/incidents/m39f83xg9z9y.md) | major | 2021-03-23 15:08 UTC | 2021-03-23 15:08 UTC | 0 min | resolved |
| [Outage](https://rewindex.com/company/substack/incidents/6q3zlrl35ksy.md) | critical | 2021-03-31 14:48 UTC | 2021-03-31 14:59 UTC | 11 min | resolved |

## Cite this

Substack posted 4 status incidents in March 2021 (4 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/substack/2021/03
- Citation: Substack, “Substack in March 2021” (2021-03-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/substack/2021/03 (CC BY 4.0).
- Markdown link: `[Substack: Substack in March 2021 (2021-03-01)](https://rewindex.com/company/substack/2021/03)`


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Canonical: https://rewindex.com/company/substack/2021/03 · Markdown: https://rewindex.com/company/substack/2021/03.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T10:18:06.070Z