Slack outage history

Every smaller Slack incident

Minor and short incidents from the Slack status page, newest first, each with a line from the official updates. Times are UTC.

October 2026

• Oct 14, 2026, 00:23 UTC · Single Sign On errors

  duration not stated · rated "Incident"

  "Some users may have experienced trouble logging into Slack. We identified the trigger and resolved the issue and restored access. We're sorry for the disruption."

• Oct 9, 2026, 15:35 UTC · Slack for iOS closing unexpectedly when opening channels

  3 days 1 hour · rated "Incident"

  "We've rolled out an updated version of the Slack iOS app to all impacted customers. Channels now open without the app closing unexpectedly."

• Oct 1, 2026, 12:39 UTC · Free Plan Customers Are Experiencing Message Failures

  6 hours 20 min · rated "Incident"

  "A messaging integration briefly caused some free-plan workspaces to exceed their daily messaging limit, blocking them from sending messages."

September 2026

• Sep 12, 2026, 11:04 UTC · Some customers experiencing blurry image previews and download issues

  8 hours 56 min · rated "Incident"

  "Some customers experienced blurry images that couldn't be downloaded across all clients, affecting files uploaded before a recent file storage update."

• Sep 10, 2026, 00:34 UTC · Trouble loading Workspace-level Apps & Workflows settings page is returning blank pages

  2 hours 40 min · rated "Incident"

  "This incident has been resolved. The engineering team has confirmed that the fix has been successfully deployed. We apologize for any disruptions this may have caused to your day."

August 2026

• Aug 13, 2026, 21:21 UTC · Trouble Accessing Historical Messages With Custom Data Retention Policies Enabled

  32 days 1 hour · rated "Incident"

  "We've completed restoring shared files for all remaining affected workspaces and restored and verified all affected data."

• Aug 6, 2026, 22:22 UTC · Trouble Using Search Bar For Some Admins

  2 hours 44 min · rated "Incident"

  "We've completed the rollback of the recent change that was the trigger of the issue. The Search bar and Admin dashboard is restored for all users. We apologize for the inconvenience caused to you and your business."

July 2026

• Jul 28, 2026, 02:13 UTC · Feature Degradation Affecting the Receipt of Emails in Slack

  1 hour 30 min · rated "Incident"

  "The fix has been successfully deployed, and validation is now complete. The issue preventing users from receiving incoming emails into Slack is fully resolved, and normal service functionality has been restored."

• Jul 24, 2026, 08:22 UTC · Issue sending messages to channels via certain Workflows

  2 hours 24 min · rated "Incident"

  "We've completed the revert of the recent change and have validated that this has brought customers out of impact and can now successfully send a message to a channel using Workflows that include 'refer to a message link'."

• Jul 24, 2026, 02:18 UTC · Receiving reminders in Slack issue

  1 hour 2 min · rated "Incident"

  "After a period of monitoring, we can see that reminders are now working as expected following the fix deployment. This issue has been resolved as of 03:00 UTC, July 24. We apologize for any inconvenience this issue has caused you."

June 2026

• Jun 26, 2026, 09:12 UTC · Chat functionality unavailable on Slack Help page

  57 minutes · rated "Incident"

  "We've resolved the issue and users can now use the Chat feature on the Slack Help Center. We performed a configuration change, which brought the feature back online and have validated that it's functioning as expected."

• Jun 17, 2026, 22:33 UTC · Trouble loading SSO configuration settings for some workspace admins

  5 hours 41 min · rated "Incident"

  "We have successfully deployed the fix to production and the issue is resolved. The Admin SSO and Authentication Configuration page for standalone workspaces should now display the correct settings."

• Jun 17, 2026, 00:38 UTC · Trouble performing some actions

  29 minutes · rated "Incident"

  "This issue is now resolved for all users. We apologize for any disruptions to your day."

• Jun 16, 2026, 15:50 UTC · Trouble submitting workflow forms with file attachments on Android.

  6 days 5 hours · rated "Incident"

  "This issue has been resolved. Android users who were experiencing issues submitting workflow forms containing a required file upload field can now do so successfully. A fix was delivered via a new update to the Slack Android app."

• Jun 16, 2026, 01:19 UTC · Slack Messaging issue

  duration not stated · rated "Incident"

  "Some users may have been unable to edit or delete messages in certain channels. We identified and resolved the issue. We apologize for how this issue affected you and your business."

• Jun 11, 2026, 22:13 UTC · Child windows displaying content at half height

  1 hour 2 min · rated "Incident"

  "We've validated that the fix resolved the issue and child windows are now displaying content as expected."

• Jun 10, 2026, 20:36 UTC · Trouble with Gmail add-on Integration

  10 hours 3 min · rated "Incident"

  "We've resolved the issue that prevented customers from using the Slack Gmail add-on. The fix has been successfully deployed; health metrics have stabilized, and the Gmail add-on is now fully operational for all affected users."

• Jun 9, 2026, 15:24 UTC · Trouble adding multiple users to channels

  30 hours 18 min · rated "Incident"

  "We've resolved an issue that could cause incorrect email address tokens to appear when users pasted multiple email addresses into the member invite flow."

• Jun 8, 2026, 19:00 UTC · Some users unable to sign in

  36 minutes · rated "Incident"

  "The issue affecting SMS-based two-factor authentication for users in EMEA has been resolved, and all services are now functioning as expected."

• Jun 3, 2026, 16:33 UTC · Administrators may experience errors in member management.

  1 hour 2 min · rated "Incident"

  "The Slack engineering team identified the cause as a recent update that introduced a code change which caused the invite modal to fail when accessed from the Admin page."

• Jun 3, 2026, 00:58 UTC · Trouble connecting or loading Slack

  49 minutes · rated "Incident"

  "This issue is now resolved for all users. - Current status and recent actions taken: we've resolved the issue where some Slack users may have experienced message send failures and thread loading issues."

• Jun 2, 2026, 16:16 UTC · Connectivity Issues Affecting Some Users in Europe

  duration not stated · rated "Incident"

  "Current status: The Slack engineering team investigated connectivity issues that affected some users between approximately 13:30 and 14:00 UTC on June 2, 2026. The issue has been resolved and no further impact has been reported."

• Jun 1, 2026, 02:08 UTC · Partial Degradation Impacting Usergroups

  57 minutes · rated "Incident"

  "Our investigation has determined that the issue is isolated to a single customer environment and is not impacting the broader service."

May 2026

• May 27, 2026, 23:00 UTC · Trouble with Slack - General Slack functionality issues

  16 hours 21 min · rated "Incident"

  "This issue is now resolved for all users. - Current status and recent actions taken: We deployed a series of configuration adjustments and infrastructure fixes to restore services."

• May 19, 2026, 20:51 UTC · Trouble uploading files and emojis in Slack

  1 hour 36 min · rated "Incident"

  "This issue is now resolved for all users. - Current status and recent actions taken: The fix has successfully deployed, and our health metrics have stabilized. The issue is now fully resolved for all affected users."

• May 18, 2026, 14:53 UTC · Huddle AI summaries not being generated

  duration not stated · rated "Incident"

  "Some Slack users experienced issues where Huddle AI summaries ‌weren't being generated. Users also appeared to be showing as in a huddle after it had ended. We've fixed both issues."

• May 14, 2026, 14:37 UTC · Issues affecting file uploads, message edits, channel renames, and channel creations

  57 minutes · rated "Incident"

  "The issue affecting multiple features, including file uploads, message edits, and channel management, has been resolved. A fix has been fully deployed, and all systems are functioning normally."

• May 8, 2026, 18:31 UTC · EKM customers were previously experiencing issues with channel loading and message delivery

  3 days 3 hours · rated "Incident"

  "Users who rely on Enterprise Key Management (EKM) may have experienced elevated latency and errors across messaging, channel loading, workflows, and file operations starting around 5:55 AM PDT on May 11, 2026."

• May 8, 2026, 12:13 UTC · Scheduled Grid Migrations are experiencing extended downtime

  5 hours 31 min · rated "Incident"

  "This issue is now resolved. - Current status and actions being taken: We identified database write throttling as the cause of the stalled grid migrations."

• May 4, 2026, 10:00 UTC · Slow behaviour in Slack

  7 hours 37 min · rated "Incident"

  "This issue is now resolved for all users. - Current status and recent actions taken: A fix has been deployed that resolved the underlying cause of this issue."

• May 1, 2026, 01:50 UTC · Slack Search Feature Disruption - Japan region

  duration not stated · rated "Incident"

  "At 23:20 UTC, April 30, 2026, a feature disruption began affecting the Slack Search feature for a subset of customers in Japan region. As a result, users were unable to use Search functionality within Slack."

April 2026

• Apr 27, 2026, 17:11 UTC · Users May Not Receive Notifications on Slack Thread Replies

  3 hours 24 min · rated "Incident"

  "We've successfully performed a rollback in the production environment, and all systems are now functioning as expected. Users should no longer experience any issues with thread replies not generating a notification banner."

• Apr 23, 2026, 07:27 UTC · Slack Threads Not Loading

  2 hours 24 min · rated "Incident"

  "Further investigation confirms that the issue impacting Thread loading has been self- resolved, and our team will continue to investigate to ensure that this doesn't reoccur."

• Apr 21, 2026, 13:46 UTC · Custom status not expiring

  2 hours 1 min · rated "Incident"

  "Resolved This issue is now resolved for all users. - Current status and recent actions taken: Custom statuses set to expire at a specific time are now clearing as expected."

• Apr 20, 2026, 09:05 UTC · Users may experience delays due to increased load on bychan keyspace affecting system performance

  duration not stated · rated "Incident"

  "This issue is now resolved for all users."