Microsoft Teams vs Slack - Uptime & Outage Comparison
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.
Microsoft Teams
Status monitoring since September 2025
Major Outage
Microsoft Teams Incident Statistics
1
Last 7 days
1
Last 30 days
6
Last 90 days
Recent Microsoft Teams Incidents
Ongoing
4 days ago
Some users are unable to search, chat or call users in Microsoft Teams Free
We're continuing to review various available mitigation strategies to determine the most effective method to relieve ...
Resolved
about 1 month ago
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...
Resolved
2 months ago
Some users may experience issues signing into Microsoft Teams Free on mobile ...
We've identified a recent deployment that's causing some users to experience issues signing into Teams Free on mobile...
Slack
Status monitoring since April 2020
Operational
Slack Incident Statistics
1
Last 7 days
5
Last 30 days
24
Last 90 days
Recent Slack Incidents
Resolved
5 days ago
Users May Not Receive Notifications on Slack Thread Replies
Some users have reported issues with thread replies not generating a notification banner. We’re investigating the iss...
Resolved
9 days ago
Slack Threads Not Loading
Some users are having trouble loading Threads in Slack, this is affecting Windows and Chrome users. Users may receive...
Resolved
11 days ago
Custom status not expiring
We're aware of an issue affecting Slack. Some users who have set a custom status to expire at a specific time are fin...
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