Compare uptime, outage statistics, and incident history between Microsoft Teams and Slack. See which service has better reliability.
Note: Each service has different practices when updating its status page. One service may report more incidents due to transparency, not necessarily worse reliability. Compare these stats with context.
Status monitoring since September 2025
Users may be unable to access or sign in to Microsoft Teams Free on iOS devices
We've determined that this issue is due to a recent change that included a reference to a deprecated authentication c...
Some users are unable to search, chat or call users in Microsoft Teams Free
We're monitoring our fix deployment to ensure it has saturated throughout the entire affected environment before vali...
Users may intermittently be unable to join meetings or access Microsoft Teams...
We're continuing to develop our fix aimed at addressing the regression introduced by the offending Windows update aft...
Status monitoring since April 2020
Issue sending messages to channels via certain Workflows
We’re aware of an issue affecting Workflows that include 'refer to a message link'. Users with these workflows are un...
Receiving reminders in Slack issue
Some users are reporting issues with receiving reminders in Slack. We're aware of the issue and are actively investig...
Chat functionality unavailable on Slack Help page
We're aware of an issue affecting users ability to reach our Slack Support team via the Chat functionality on the Sla...
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