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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

Microsoft Teams

Status monitoring since September 2025

Operational

Microsoft Teams Incident Statistics

1
Last 7 days
2
Last 30 days
4
Last 90 days

Recent Microsoft Teams Incidents

Resolved 28 days ago

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...

Resolved 3 months ago

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...

Resolved 4 months 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...

Slack

Slack

Status monitoring since April 2020

Operational

Slack Incident Statistics

2
Last 7 days
3
Last 30 days
22
Last 90 days

Recent Slack Incidents

Resolved about 20 hours ago

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...

Resolved 1 day ago

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...

Resolved 29 days ago

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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