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Outage in Slack

Issues while sending messages and loading message history is impacting some users

Resolved Minor
March 28, 2026 - Started about 10 hours ago - Lasted about 1 hour
Official incident page

Incident Report

Summary AI Generated

Slack experienced a messaging incident where some users had difficulty sending messages and loading message history due to high resource utilization on Slack's systems. The issue affected only a small subset of users, who could work around the problem by retrying failed message sends or history loads. The incident lasted 1.5 hours while Slack's team investigated logs and diagnostic information to resolve the underlying resource constraints.

We're investigating a new incident.

  • Current impact to end users: Some users may experience issues while sending messages and loading message history in Slack.

We'll provide an update within 30 minutes including further details on current actions being taken.

Components affected
Slack Messaging

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Latest Updates ( sorted recent to last )
about 9 hours ago - at 03/28/2026 05:19AM

Our work on this issue is still ongoing.Current status and actions being taken: We are reviewing additional logs and diagnostic information to determine the best path to resolution.We'll provide another update in 60 minutes until the impact is resolved for all users.

about 10 hours ago - at 03/28/2026 04:42AM

We continue to investigate the issue.Current status and actions being taken: We have identified high resource utilization as a potential trigger. We continue to investigate and determine the best path to resolution.Estimated time to resolution: We don't have the exact resolution time at the moment and will update you once we have additional information.Scope: This is only impacting a small subset of users.Current impact to end users: Some users may experience issues while sending messages and loading message history in Slack.Known workarounds: Users can mitigate the issue by retrying the message sending or loading of message history.We'll continue to provide updates every 30 minutes until the impact is resolved for all users.

about 10 hours ago - at 03/28/2026 04:12AM

We're investigating a new incident.Current impact to end users: Some users may experience issues while sending messages and loading message history in Slack. We'll provide an update within 30 minutes including further details on current actions being taken.

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