See how Slack and Microsoft 365 work together.

See how Slack organises your Microsoft 365 tools, so you can find Outlook emails and jump into Teams calls without having to open any new tabs.

Search across Outlook directly from Slack
Launch Teams calls from any channel
Preview OneDrive files instantly

Watch the two-minute demo 🍿

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Don’t take our word for it. Thousands of G2 reviews agree.

No. 1We rank No. 1 in nine G2 categories.Teams only leads in three.^{1, 2}

Over 27,500 five-star reviews.Teams only has 11,000+.^{1, 2}

2,382Positive reviews for ease of use.Teams only has 752.^{1, 2}

‘Slack allows our people to bring their authentic selves to work and build community. From automations to bots to integrations, it’s also a true developer’s platform. We absolutely love Slack.’
Varun KrishnaCEO, Rocket Companies

‘Before Slack, decisions got lost across email and Teams conversations. Now, context lives in channels – searchable, connected to the record and tied to the workflow. We move faster because the information our teams and AI need is always right there.’
Andrew RussoVP of Business Systems, BACA Systems

‘We think of Slack as the connective layer across our ecosystem. Microsoft 365 remains foundational, and Slack complements that by bringing coordination and visibility into the flow of work – each playing to its strengths.’
Ha HoangCIO, Commvault

‘Slack allows our people to bring their authentic selves to work and build community. From automations to bots to integrations, it’s also a true developer’s platform. We absolutely love Slack.’
Varun KrishnaCEO, Rocket Companies

‘Before Slack, decisions got lost across email and Teams conversations. Now, context lives in channels – searchable, connected to the record and tied to the workflow. We move faster because the information our teams and AI need is always right there.’
Andrew RussoVP of Business Systems, BACA Systems

‘We think of Slack as the connective layer across our ecosystem. Microsoft 365 remains foundational, and Slack complements that by bringing coordination and visibility into the flow of work – each playing to its strengths.’
Ha HoangCIO, Commvault

1 G2 Slack Reviews & Product Details Nov 2025
2 G2 Microsoft Teams Reviews & Product Details Nov 2025