Slack Outage History

The Slack Search component experienced degraded performance starting at 9:34 PM UTC, with users seeing slower AI search summaries and delays in general search results. The issue affected search functionality across the service and was resolved at 11:29 PM UTC. Slack issued 2 status updates during the incident, communicating ongoing investigation and eventual remediation. User reports indicated slowness from multiple regions, with activity returning to normal after the incident window.

Slack experienced a brief degraded performance where clicking Edit in a profile caused a grey screen and the profile menu failed to load. This affected desktop and web users on Windows and Mac, with the Mobile app unaffected. The outage began at Sep 23, 2025 1:04 PM UTC and was resolved by Sep 23, 2025 1:54 PM UTC, lasting about 50 minutes.

Slack's status page attributed the issue to a degraded component under Apps/Integrations/APIs. The incident included two official status updates during the outage as teams worked to restore the profile editing flow.

Slack experienced a brief degradation impacting Apps/Integrations APIs. The incident began at 1:14 PM UTC and was resolved by 2:04 PM UTC, lasting about 50 minutes. Slack documented the issue on its status page and listed a degraded state for Apps/Integrations/APIs during this period, with 2 status updates issued as the situation progressed.

Slack experienced a temporary connectivity issue that affected loading of Slack.com, with some users seeing a server error when trying to access the site. The outage began at 7:44 PM UTC and lasted about 45 minutes, ending at 8:29 PM UTC. The Slack status page issued two updates during the incident, documenting the investigation and subsequent recovery as the Connectivity component returned to normal. The impact appeared limited to a subset of users rather than a global outage, based on the status updates and the quick restoration of service.

Slack experienced an activity badge display issue in the Notifications component, which could cause the unread badge to persist after all messages were read. The impact appeared limited to the badge display and did not indicate a broader Slack outage. The incident began at Sep 16, 2025 6:14 AM UTC and was resolved by Sep 17, 2025 7:29 PM UTC, lasting roughly 37 hours and 15 minutes. Slack issued two status updates during the incident as engineers investigated the problem, with the component returning to normal after the fix was applied.

Slack experienced a display issue where the Activity badge could continue to show an unread count after all messages were read, causing confusion for users relying on the badge for notifications. The issue affected the Notifications component. The incident began at Sep 12, 2025 6:09 AM UTC and was resolved by Sep 12, 2025 5:54 PM UTC, lasting about 11 hours and 45 minutes. Slack published two status updates during the incident as teams investigated and implemented a fix, with the badge behavior returning to normal after the final update.

Slack reported an issue where the iOS app could not be opened for some users on version 25.09.10, with an error stating that jailbroken devices are not allowed to access Slack. The problem affected Slack's Login/SSO flow and prevented launching the app for affected users. The incident began on 9:04 PM UTC and was resolved by 12:49 AM UTC, lasting approximately 3 hours and 45 minutes. The Slack status page issued 2 official updates during the incident to document the investigation and recovery.

The issue appeared to be isolated to the iOS app experience and did not indicate a broader outage across Slack services. Once the problem was addressed, access to Slack on iOS returned to normal and the Login/SSO flow resumed functioning as expected.

Slack experienced a temporary connectivity issue affecting Microsoft-related connectors, including Outlook, Calendar, OneDrive, and Teams. Users attempting to connect these services via Slack Apps/Integrations/APIs may have seen errors. The incident began at Sep 1, 2025 8:24 AM UTC and was resolved by Sep 1, 2025 1:24 PM UTC, lasting about five hours. Slack’s status page issued two updates during the incident, first noting an investigation and later confirming resolution. The disruption was limited to Microsoft-related connectors while the rest of Slack appeared unaffected.

Slack experienced a brief outage affecting app installation, with users unable to install custom apps and integrations as the OAuth permissions page displayed a disabled Allow button. The incident began at Aug 30, 2025 12:49 AM UTC and was resolved by Aug 30, 2025 5:04 AM UTC, lasting about 4 hours and 15 minutes. The Apps/Integrations/APIs component was affected during this period, and Slack issued 2 status updates as they investigated and worked toward resolution.

Slack experienced a brief issue where user status indicators were displayed incorrectly across mobile, browser, and desktop clients, causing some users to appear as 'Away' despite being active. The problem affected the Messaging component and could lead to confusion about colleagues' presence across all platforms. The outage began at Aug 28, 2025 6:04 PM UTC and was resolved by Aug 28, 2025 7:09 PM UTC, lasting about 1 hour and 5 minutes. Slack's status updates indicated an investigation started at Aug 28, 2025 6:04 PM UTC and the issue was resolved by Aug 28, 2025 7:09 PM UTC. No user reports were observed during the incident.