Slack vs Microsoft Teams 2026: Chat, Calls and the Microsoft 365 Question
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Slack and Microsoft Teams are the two titans of workplace communication, and for most organizations, the decision comes down to these two. Slack pioneered the channel-based messaging model that replaced email for internal communication, earning a devoted following for its design, integrations, and culture-shaping product decisions. Microsoft Teams used the massive Microsoft 365 ecosystem to become the default choice for enterprises, bundling chat, video, and file collaboration into a suite that many companies already pay for.
We compare the two in our Slack vs Discord guide.
📊 How We Compared
Slack and Microsoft Teams were each compared against documented features and published pricing. The cost picture assumes a 25-person team. Integration coverage for Google Workspace and Slack was checked against vendor documentation — the two ecosystems our readers ask about most. Ratings reflect our editorial weighting, not an aggregate of third-party review scores.
The choice between them is rarely made in a vacuum. If your company is deeply embedded in Microsoft 365, Teams is almost always the path of least resistance. If your team uses a diverse stack of best-of-breed SaaS tools, Slack's integration-first approach often fits better. In this comparison, we break down messaging, integrations, video conferencing, file sharing, pricing, and real-world pros and cons to help you make the right call.
Editor’s take: For most companies this is decided by a licence they already pay for, since Teams arrives with Microsoft 365. Slack's case is the integration directory and search, and it keeps unlimited message history on every paid plan — which matters once chat becomes where the company's decisions live.
Editor's Take
This decision is often made by what the organisation already pays for: if you are on a Microsoft productivity plan, Teams is bundled and hard to argue against. Where the choice is open, the comparison is really about chat experience versus meeting and document integration. Most large organisations end up with Teams for reach.
Slack vs Microsoft Teams: at a glance
Pricing note: the figures in this guide are the vendors' published list prices as of September 2026. This page covers Slack vs Microsoft Teams : Chat, Calls and the Microsoft 365 Question. Vendors change pricing without notice, so treat these numbers as a starting point and confirm current pricing with the vendor before you buy.
| Feature | Slack | Microsoft Teams |
|---|---|---|
| Starting price | $7.25/user/mo (Pro) | $4/user/mo (Teams Essentials) |
| Free plan | Yes (90-day message history, 10 app integrations) | Yes (limited, personal use only) |
| Message history | 90 days (Free), unlimited (Pro+) | Unlimited on all paid plans |
| Video conferencing | Huddles (up to 50 on Business+) | Meetings (up to 1,000 on Standard) |
| Integrations | 2,600+ apps in Slack App Directory | 1,800+ apps in Teams Store |
| File collaboration | Google Drive, OneDrive, Dropbox | Deep SharePoint and OneDrive integration |
| Best for | SaaS-heavy stacks and startup culture | Microsoft 365 enterprises |
Where Slack and Microsoft Teams differ
Messaging and channels
Slack's messaging experience is its core strength. Channels are organized in a clean sidebar with customizable sections, and the threading model keeps conversations organized without cluttering the main channel. Slack's search is fast and powerful — you can filter by channel, person, date, file type, and more with an intuitive syntax. The ability to star messages, set reminders, and save items for later creates a personal productivity layer on top of team communication.
Teams offers a similar channel-based structure, but with some differences. Teams organizes channels under Team headers, which can feel more hierarchical than Slack's flat sidebar. Threading in Teams is mandatory — every reply is part of a thread, which keeps things organized but can make quick back-and-forth conversations feel heavier. Teams' search is functional but slower and less precise than Slack's, which is a common complaint from users switching between platforms.
Integrations and app ecosystem
Slack's App Directory is the gold standard for workplace integrations. With 2,600+ apps, Slack connects to virtually every SaaS tool a modern team uses. The integration experience is typically richer than Teams — Slack apps can post interactive messages with buttons, menus, and modals, creating mini-applications within the chat interface. Slack's Workflow Builder and open API also make it easy to build custom integrations and automations without code.
Teams has grown its app store to over 1,800 apps, and the quality of Microsoft's first-party integrations (SharePoint, OneNote, Planner, Power BI) is excellent within the Microsoft ecosystem. However, third-party integrations often feel less polished than their Slack counterparts. Teams' Power Platform (Power Automate) provides automation capabilities, but the learning curve is steeper than Slack's Workflow Builder. If your stack is Microsoft-heavy, Teams integrations are smooth. If your stack is diverse, Slack's broader ecosystem is an advantage.
Video conferencing
Microsoft Teams includes a full video conferencing solution that scales from one-on-one calls to 1,000-person meetings (and live events up to 10,000 attendees). Teams meetings include screen sharing, breakout rooms, meeting recordings with automatic transcription, together mode, and real-time captions. The deep integration with Outlook calendar means scheduling and joining meetings is frictionless for Microsoft 365 users.
Slack takes a different approach with Huddles — lightweight, voice-first calls that start with one click and feel more like walking into someone's office than scheduling a formal meeting. Huddles support screen sharing and live captions, and on Business+ plans, up to 50 people can join. For scheduled video meetings, Slack integrates with Zoom, Google Meet, and Microsoft Teams itself. Many Slack users rely on Zoom or Google Meet for formal meetings and use Huddles for spontaneous collaboration. If video conferencing is a primary need, Teams has the edge with its built-in, full-featured meeting platform.
File sharing and collaboration
Teams integrates deeply with SharePoint and OneDrive, which means every file shared in a channel is automatically stored in a SharePoint document library with proper versioning and permissions. Co-authoring Word, Excel, and PowerPoint files happens in real-time within the Teams interface. For organizations that live in Microsoft Office, this integration is smooth and powerful.
Slack handles file sharing differently — files are stored in Slack's own storage or synced from Google Drive, OneDrive, or Dropbox. When you share a Google Doc link in Slack, it unfurls with a rich preview and access request flow. Slack does not offer native co-authoring, but its file previews and search make finding shared documents easy. For Google Workspace users, Slack's integration with Google Drive is more natural than Teams' Microsoft-first approach.
AI features
Slack AI, available as an add-on on Enterprise plans, provides channel summaries, thread summaries, and search answers powered by natural language. You can ask Slack AI to summarize a channel you missed while on vacation, and it will generate a digest of key decisions and action items. The AI can also answer questions like "what did the engineering team decide about the API migration?" by searching across channels.
Microsoft Copilot in Teams offers similar capabilities — meeting summaries, thread recaps, and natural language Q&A. Copilot benefits from Microsoft's broader AI investment and can pull context from emails, documents, and calendar items across the Microsoft 365 suite. For organizations already invested in Copilot across Microsoft products, Teams becomes one surface in a company-wide AI experience.
Slack vs Microsoft Teams pricing
| Plan | Slack | Microsoft Teams |
|---|---|---|
| Free | 90-day history, 10 apps, 1:1 video | Limited (personal use, no team features) |
| Entry paid | $7.25/user/mo (Pro) | $4/user/mo (Teams Essentials) |
| Mid-tier | $15 (Business+) | $6/user/mo (Microsoft 365 Business Basic) |
| Enterprise | Custom (Enterprise Grid) | $22/user/mo (Microsoft 365 E3) |
Slack vs Microsoft Teams: pros and cons
Slack
Pros
- Best-in-class search and messaging experience
- Largest app ecosystem (2,600+ integrations)
- Huddles for spontaneous, low-friction calls
- Clean, customizable interface
- Excellent Workflow Builder for no-code automation
- Strong culture of async communication
- Cross-organization messaging with Slack Connect
Cons
- Higher per-user cost than Teams
- No built-in full video conferencing (relies on Zoom/Meet)
- Free plan limited to 90-day message history
- Can become noisy without disciplined channel management
- Slack AI only available on Enterprise plans
- Less suitable for regulated industries without add-ons
Microsoft Teams
Pros
- Included with Microsoft 365 (effectively free for M365 users)
- Full video conferencing with breakout rooms and transcription
- Deep SharePoint, OneDrive, and Office integration
- Scales to enterprise with advanced security and compliance
- Unlimited message history on all paid plans
- Strong enterprise governance and admin controls
Cons
- Interface can feel cluttered and slow
- Search is less powerful than Slack
- Threading model can feel heavy for quick conversations
- Third-party app integrations less polished than Slack
- Free plan is extremely limited for team use
- Best features require Microsoft 365 subscription
Ease of use and setup
Slack is widely regarded as the more intuitive platform. New users can navigate channels, send messages, and share files within minutes. The interface is clean, responsive, and designed with a focus on speed. Slack's keyboard shortcuts, command palette, and customizable sidebar make power users extremely efficient. The main challenge with Slack is not learning the tool — it is managing notification overload, which Slack addresses with muted channels, Do Not Disturb, and scheduled notifications.
Teams has improved significantly in usability, but it still carries the weight of being a complete enterprise tool. The interface combines chat, files, meetings, and apps in a single window, which can feel overwhelming. New users often struggle to find settings, understand the Teams-vs-Channels hierarchy, and locate shared files. Microsoft has invested in simplifying the interface, and the "New Teams" app (rebuilt for performance) is noticeably faster, but Teams still has a steeper learning curve than Slack for most users.
Customer support
Slack offers email support on all plans, with 24/7 phone and chat support on Business+ and Enterprise Grid. Their help center is well-organized, and Slack's community on Twitter and Reddit is active. Enterprise customers get a dedicated success manager and access to Slack's professional services team.
Microsoft provides 24/7 support on all business plans, with Premier Support available for enterprise customers. The Microsoft Learn documentation is extensive, and the Teams admin center provides detailed configuration guidance. However, Microsoft's support can be slower to resolve complex issues due to the size and complexity of the Microsoft 365 ecosystem.
Who should use Slack?
Slack is the better choice if your team:
- Uses a diverse stack of SaaS tools (Google Workspace, Zoom, GitHub, etc.)
- Values a fast, clean, and customizable messaging experience
- Relies on integrations and workflow automation
- Prefers spontaneous, async communication over scheduled meetings
- Is a startup, agency, or tech-forward company
- Needs cross-organization messaging with external partners
- Has a culture of open, channel-based communication
Who should use Microsoft Teams?
Microsoft Teams is the better choice if your team:
- Already uses Microsoft 365 (Word, Excel, PowerPoint, SharePoint)
- Needs built-in video conferencing with large meeting support
- Operates in a regulated industry with compliance requirements
- Wants one tool bundled with their office suite at lower cost
- Is a large enterprise with complex IT governance needs
- Relies on Outlook calendar for meeting scheduling
- Needs deep integration with Microsoft Power Platform
Still not sure?
If you already have Microsoft 365, try Teams first — it is included. If your stack is Google/SaaS-heavy, try Slack's free plan and see if it fits your culture.
See our full list of best team collaboration toolsTry Slack free → | Try Microsoft Teams free →
Our verdict: Slack or Microsoft Teams?
Slack and Teams are both excellent communication platforms, and for many organizations, the decision is made by the existing tech stack rather than feature-by-feature comparison. If you are a Microsoft 365 shop, Teams is the logical choice — it is already paid for, it integrates natively with your office tools, and it provides enterprise-grade video conferencing. The total cost of ownership is hard to beat when Teams is bundled with the suite you already use.
Slack wins when the decision is made on product quality alone. Its search, messaging experience, app ecosystem, and cultural fit make it the preferred tool for teams that communicate heavily through text and integrations. Slack's higher price is justified by a superior user experience that reduces friction and makes communication feel effortless.
Our scoring gives Slack the edge (8.7 vs 8.2), reflecting its superior messaging experience, broader app ecosystem, and stronger user satisfaction. However, if we scored purely on value for Microsoft 365 customers, Teams would win decisively. The right choice depends on your stack, budget, and communication culture — not on which tool has the higher score in an abstract comparison.
One practical note: switching between Slack and Teams is painful but not impossible. Both tools offer data export, and third-party migration services can move channels and message history. The hardest part is cultural — teams that have developed communication norms in one tool need time to adapt to the other. Choose wisely, but know that a migration, while inconvenient, is manageable if your needs change.
