# Substack change history Filter: kind=all. Query: `?kind=notable|all|pages|pricing|trust|legal|incident|incident_edit|incident_deleted|incident_update&history=&page=N`. Company profile: [Substack](https://rewindex.com/company/substack.md) ## Changes by kind | Kind | Changes | Notable | Latest (UTC) | | --- | --- | --- | --- | | Major incident | 12 | 12 | 2026-02-12 23:25 UTC | ## Timeline | When (UTC) | Kind | Change | Label | Summary | | --- | --- | --- | --- | --- | | 2026-02-12 23:25 UTC | Major incident | [Major incident: Substack Availability Issues](https://rewindex.com/change/ia661f3f26ddb1b.md) | outage | Substack reported a major availability outage affecting Substack.com, Substack publications, and Writer dashboards starting at 2026-02-12 23:25 UTC. It lasted 1 h 5 min and was resolved at 2026-02-13 00:31 UTC; Substack reported implementing a fix but did not state a cause. | | 2026-02-11 14:24 UTC | Major incident | [Major incident: Substack Availability Issues](https://rewindex.com/change/i56fb04f3ca46b4.md) | outage | Substack reported a major outage affecting Substack.com, Substack publications and Writer dashboards, with loading issues starting at 2026-02-11 14:24 UTC. A fix was deployed, and services, error rates and latency returned to normal by 15:15 UTC; the incident was resolved at 2026-02-11 15:45 UTC, lasting 1 h 21 min. | | 2025-10-20 13:41 UTC | Major incident | [Major incident: Post emails delayed](https://rewindex.com/change/i8f903847d4e3ac.md) | degradation | Substack reported a major incident starting 2025-10-20 13:41 UTC, delaying scheduled post emails and partially disrupting publication dashboards, subscriber tabs and statistics. The vendor linked scheduled-post delays to a service-provider outage; manual publishing was a workaround. Scheduled sends recovered and the backlog cleared; the incident resolved at 2025-10-21 00:52 UTC after 11 h 11 min. | | 2025-04-29 18:15 UTC | Major incident | [Major incident: Increased error rates](https://rewindex.com/change/i7b561c001c7c1d.md) | outage | Substack reported a major incident with increased error rates and system-wide performance degradation affecting publications, writer dashboards, Substack.com, the app, and post editor. It started at 2025-04-29 18:15 UTC and was resolved at 2025-04-29 19:16 UTC, lasting 1 h 1 min; full recovery was reported at 18:41 UTC. | | 2025-03-24 23:41 UTC | Major incident | [Major incident: Errors loading notes feed](https://rewindex.com/change/idcd6080fa61e4a.md) | outage | Users could not load the notes feed on Substack.com during a major-impact incident that started at 2025-03-24 23:41 UTC and lasted 28 min, resolving at 2025-03-25 00:09 UTC. Substack reported implementing a fix and monitoring the results before resolution. | | 2025-02-03 19:25 UTC | Major incident | [Major incident: Substack home page and app home tab errors](https://rewindex.com/change/if3cc8bb2ed96d3.md) | outage | Substack reported a major incident affecting its website home page and app home tab, with increased errors and Notes missing from some users’ feeds. It lasted 1 h 24 min, from 2025-02-03 19:25 UTC to 2025-02-03 20:49 UTC; Substack restored feeds for all users and reported that error rates had subsided. | | 2025-01-21 23:44 UTC | Major incident | [Major incident: Increased latency and errors](https://rewindex.com/change/iae392425c33f8c.md) | degradation | Substack reported a major incident causing increased latency and errors across its websites and applications, including custom domains, publications and writer dashboards. It started at 2025-01-21 23:44 UTC and was resolved at 2025-01-22 00:36 UTC, lasting 52 min; no specific cause or fix was stated. | | 2024-12-13 16:21 UTC | Major incident | [Major incident: Elevated Error Rates](https://rewindex.com/change/i2d80689a8945b3.md) | outage | Substack reported a major outage with elevated error rates on its websites and mobile application, starting 2024-12-13 16:21 UTC and resolved at 2024-12-13 16:50 UTC (computed duration: 28 min). Services were fully available by 16:28 UTC; listed components included Email delivery, Push Notifications, Subscription invoice processing, Custom domains, Substack.com, Substack publications and Writer dashboards. | | 2024-10-01 14:04 UTC | Major incident | [Major incident: Posts not being delivered via email](https://rewindex.com/change/i87ad1893dcd2e3.md) | degradation | Substack reported a major email delivery incident affecting some posts, starting 2024-10-01 14:04 UTC and resolved at 2024-10-01 15:06 UTC, lasting 1 h 1 min. At 14:32 UTC, Substack said delivery delays were resolved and previously scheduled posts were being delivered. | | 2024-08-23 17:36 UTC | Major incident | [Critical incident: Substack increased latency and error rate](https://rewindex.com/change/icc891e0fd7c6c2.md) | degradation | Substack reported a critical incident with increased latency and errors affecting Substack.com, Substack publications, Writer dashboards, and the Substack app. It started at 2024-08-23 17:36 UTC and was resolved at 2024-08-23 19:06 UTC, lasting 1 h 29 min. Substack said it identified the cause but did not disclose it. | | 2024-08-13 19:24 UTC | Major incident | [Critical incident: Increased error rates](https://rewindex.com/change/i30b0e8df3a848a.md) | outage | Substack reported critical increased error rates affecting Substack.com, Substack publications, and Writer dashboards, starting at 2024-08-13 19:24 UTC and resolved at 2024-08-13 19:42 UTC; the recorded duration was 17 min. Substack stated that a fix was implemented but did not specify the cause. | | 2024-08-04 19:08 UTC | Major incident | [Major incident: Delayed push notifications due to OneSignal outage](https://rewindex.com/change/i533e1d0bffe9a3.md) | degradation | Substack reported major delays to Push Notifications caused by an outage at its delivery provider, OneSignal. The incident started at 2024-08-04 19:08 UTC and was resolved at 2024-08-04 20:32 UTC, lasting 1 h 23 min. | --- Canonical: https://rewindex.com/company/substack/changes · Markdown: https://rewindex.com/company/substack/changes.md · JSON: https://rewindex.com/api/v1/companies/substack/changes · Generated 2026-10-18T01:29:09.219Z