Slack Outage History

Slack experienced a brief degradation impacting Messaging and Connectivity, with users reporting trouble sending or receiving messages and loading Slack. The incident began at 4:34 PM UTC and lasted about 1 hour and 15 minutes, with service restored by 5:49 PM UTC. The Slack status page indicated an investigation and ongoing efforts to resolve the issue, and Slack issued 2 updates during the incident to communicate progress and resolution. The impact appeared limited to Slack users attempting to use messaging and connectivity features, with no clear regional pattern identified.

Slack experienced issues loading organizational dashboards for some users, with search results that may be incomplete or inaccurate. This affected the Workspace/Org Administration area, causing dashboards to fail to render as expected and potentially hindering administrative tasks.

The outage began at Jun 2, 2025 6:04 PM UTC and was resolved by Jun 2, 2025 8:39 PM UTC. Slack issued three status updates during the incident as teams investigated and worked to restore normal functionality. The impact was contained to organizational dashboards, with other Slack functionality remaining available.

Slack experienced a partial outage where a small number of users could not connect to Slack or send messages. The incident began at 12:59 AM UTC and was resolved by 2:34 AM UTC, for a total duration of about 1 hour and 35 minutes. The Slack status page issued two updates during the incident as engineers investigated the connectivity issue.

Slack experienced a partial outage affecting connectivity and the ability to load threads starting at 10:39 PM UTC. The incident impacted 8 Slack components, including Connectivity, Workflows, Canvases, Search, Apps/Integrations/APIs, Login/SSO, Messaging, and Files, causing degraded user experience as users were unable to connect or load threads. The outage lasted about 1 hour 30 minutes with components gradually returning to normal as the incident progressed.

Slack issued 3 status updates during the incident as it investigated the cause and tracked affected components, including Connectivity and the eight components listed. By 12:09 AM UTC, all listed components had recovered and Slack services were restored.

Slack experienced a partial outage affecting notification delivery for channel messages and direct messages when the chat window was open, potentially causing some users to miss alerts while actively viewing conversations. The incident began at May 7, 2025 2:09 PM UTC and Slack indicated they were investigating reports of missing notifications.

Slack issued two status updates during the incident and confirmed that notifications were restored, with services returning to normal by May 7, 2025 6:24 PM UTC. The outage lasted approximately 4 hours and 15 minutes.

Slack experienced a brief partial outage affecting the Messaging component, with some users unable to send messages in certain channels or conversations and the Threads view showing a 'Something's fishy!' error. The incident began at 3:29 AM UTC and was resolved by 6:24 AM UTC, lasting about 2 hours and 55 minutes. Slack issued 3 status updates during the incident as teams investigated and then confirmed recovery.

Slack's Messaging component experienced degraded performance beginning at 12:39 AM UTC, with the status transitioning from up to warn, and recovered by 1:19 AM UTC. The incident lasted roughly 40 minutes and affected only the Messaging component. Slack issued two official status updates during the event, describing the degradation and the resolution.

Slack's Later tab on the desktop app and in web browsers experienced an outage that disrupted workflow for some users. Switching from the In Progress tab to Archived or Completed could fail, and items may have been missing from Archived or Completed. The issue began at May 5, 2025 5:04 PM UTC and was resolved by May 5, 2025 8:14 PM UTC, lasting about 3 hours and 10 minutes. The Slack Messaging team posted updates as they investigated, with two status updates issued during the incident.

By the time the issue was resolved, the Later tab functionality had been restored across supported clients. The incident appeared to affect a subset of users and did not note a regional pattern.

Slack users could not perform actions on the Manage Members page within Workspace Settings and Permissions, impacting administrative tasks for some organizations. The issue affected the Workspace/Org Administration component and caused a brief outage lasting about 30 minutes.

According to Slack's status updates, the incident began at 8:19 PM UTC and was resolved by 8:49 PM UTC. The provider posted two updates during the incident, noting investigation and eventual restoration of the Manage Members functionality.

Slack experienced a brief disruption to the Zoom integration within Slack's Apps/Integrations/APIs, which may have prevented some users from connecting to Zoom or using the integration and could have shown error messages. The incident affected the Apps/Integrations/APIs component and lasted about 1 hour and 20 minutes, beginning at Apr 16, 2025 7:49 PM UTC and ending at Apr 16, 2025 9:09 PM UTC. The Slack status page moved from up to a warning during the event.

Slack posted two status updates during the incident: an initial notice of trouble with the Zoom integration and ongoing monitoring, followed by a resolution notification confirming that the integration was restored. The issue appears to have been resolved with services returning to normal by the second update.