Head-to-Head
Slack vs Microsoft Teams (2026)
Slack
Freemium★ 4.5
Best for: centralising team communication across projects and departments, building automated workflows between apps (jira, github, salesforce)
Microsoft Teams
Freemium★ 4.2
Best for: organisation-wide communication for microsoft 365 users, project collaboration with shared office documents
Slack and Microsoft Teams are the two dominant team messaging platforms. Slack wins on third-party integrations and developer flexibility - over 2,600 app integrations versus Teams roughly 700. Teams wins decisively on Microsoft 365 integration, enterprise IT compliance, and cost for companies already paying for M365. For pure messaging experience most users prefer Slack; for companies already in the Microsoft ecosystem Teams is the smarter budget choice.
Feature Comparison
Microsoft 365 Integration
Teams is native to M365 - meetings, calendar, SharePoint, and OneDrive are built in. Slack requires third-party connectors.
Third-party App Integrations
Slack has 2,600+ integrations in its marketplace. Teams has grown its ecosystem but lags Slack for developer-built tools.
Video and Meeting Quality
Teams meetings are enterprise-grade with breakout rooms, live captions, and direct dial-in. Slack Huddles are lightweight by design.
Pricing (standalone)
Teams Essentials starts at $4/user/mo. Teams is included free in most M365 Business plans. Slack Pro starts at $7.25/user/mo.
Developer and API Experience
Slack API is widely regarded as the gold standard for chatops and bot development. Teams API is functional but less documented.
Search and Message History
Slack search is fast and accurate across channels, threads, and files. Teams search covers messages but can be slow on large tenants.
Mobile App Experience
Both mobile apps are solid. Slack feels more responsive; Teams mobile handles meeting join more reliably.
Verdict
This comparison is context-dependent. Slack scores 27/35 and Microsoft Teams scores 28/35. Choose based on your specific workflow needs.
Bottom Line
Slack and Microsoft Teams are the two leading workplace messaging platforms in 2026. Slack remains the better product on UX, integrations, and developer-friendly features (slash commands, workflow builder, custom bots). Teams is bundled with Microsoft 365, includes video conferencing without an upgrade, and is free for organisations already paying for Office. Pick Slack if your team values software quality, frequently uses third-party integrations, and chat is the core collaboration surface. Pick Teams if your organisation is already on Microsoft 365 and the bundled price (often $0 effective) outweighs the UX gap. Most large enterprises run Teams; most startups and tech-forward SMBs run Slack.
Pick Slack
You want the best chat-first collaboration tool with thousands of native integrations and a developer-friendly platform. Slack continues to lead on user experience and search quality. Best for tech companies, startups, and teams where chat is the primary work surface.
Try Slack →Pick Microsoft Teams
Your organisation runs on Microsoft 365 and you want collaboration tools bundled with email, Office, and storage. Teams is free with most M365 subscriptions and includes video, file sharing, and chat in one app. Best for enterprises and large traditional organisations.
Try Microsoft Teams →Frequently asked
Is Teams really free?
Free with Microsoft 365 Business Basic ($6/user/mo) or any higher M365 tier. Teams Essentials standalone is $4/user/mo. Slack Pro starts at $7.25/user/mo. For organisations already on M365, Teams is effectively free; for organisations not on M365, the price is closer to Slack.
Which has better video conferencing?
Teams, by a clear margin. Teams Meetings include screen recording, breakout rooms, large meetings (1000+), and tight Outlook integration. Slack Huddles are improving but are designed for casual quick chats not formal meetings. For meeting-heavy organisations, Teams is more capable.
Can I use both?
Yes, and many organisations do. Common pattern: Teams for meetings and external collaboration with M365-using clients; Slack for internal chat and engineering. Some companies pay for both at small scale because the total cost is still less than productivity loss from a single tool that does not fit.
Which has better search?
Slack, clearly. Slack search returns results faster, ranks them better, and the keyboard shortcuts (Cmd+K) are best in class. Teams search has improved through 2025-2026 but still lags. For knowledge-heavy teams that rely on chat archives as institutional memory, Slack is the stronger choice.