Slack charges $7.25–$12.50/user/mo. Teams is free if you have M365 (which most enterprises do). Discord is free for unlimited users. Here's what each actually costs — and which one makes sense for your team.
| Feature | Slack Pro | Teams (M365 Basic) | Discord (Free) |
|---|---|---|---|
| Message history | ✓ Unlimited | ✓ Unlimited | ✓ Unlimited |
| File storage | 10 GB/workspace | 1 TB OneDrive/user | 8 MB file limit (free) |
| Video calls | ✓ Huddles | ✓ Full-featured | ~ Basic voice/video |
| Screen sharing | ✓ | ✓ | ~ Go Live (limited) |
| App integrations | ✓ 2,600+ apps | ~ M365 ecosystem | ✗ Limited bots only |
| Workflow automation | ✓ Workflow Builder | ✓ Power Automate | ✗ None native |
| SSO / SAML | Business+ only | ✓ All M365 plans | ✗ No enterprise SSO |
| Compliance exports | Business+ only | ✓ | ✗ |
| Threaded replies | ✓ Best in class | ~ Less intuitive | ✓ Forum channels |
| Community-focused | ✗ | ✗ | ✓ Built for communities |
| Public servers/channels | ✗ | ✗ | ✓ |
| Games & rich media | ✗ | ✗ | ✓ Built-in |
| Tool + Plan | Monthly/seat | Annual (25 seats) | Notes |
|---|---|---|---|
| Slack Pro | $7.25 | $2,175 | Annual billing required |
| Slack Business+ | $12.50 | $3,750 | For SSO + compliance |
| Teams (M365 Basic) | $6 total | $1,800 (all-in) | Includes email, OneDrive, Teams |
| Teams (M365 Standard) | $12.50 total | $3,750 (all-in) | Includes Word, Excel, PowerPoint |
| Discord (server) | $0 | $0 | Nitro is per-individual, optional |
Key insight: If your company already pays for Microsoft 365 (most do), Teams costs $0 extra. Switching from Slack to Teams can save $2,175–$3,750/year for a 25-person team.
You're a tech startup or product team that lives in integrations. Slack's 2,600+ app marketplace, Workflow Builder, and Huddles are unmatched. Worth $7.25/user/mo if you're building with tools like GitHub, Jira, PagerDuty, or Salesforce. Loses value if your team mostly just sends messages.
You're an enterprise or mid-market company already on Microsoft 365. You're almost certainly paying $6–$12.50/user/mo for M365 already — Teams is included at zero marginal cost. Deep integration with Outlook, SharePoint, and Teams Rooms makes it the obvious default for Office-centric organizations.
You're building a developer community, open-source project, or creator community — not an enterprise team. Discord is free, has voice channels, and is the default platform for gaming/dev communities. Not suitable for sensitive business data or compliance-regulated industries (no SSO, no data export).
Slack vs Teams: These are both business communication tools, but Slack has better third-party integrations and a cleaner UX for most teams. Teams wins on price (if you're already on M365) and has better video/meeting features through integration with the full Microsoft stack.
Slack vs Discord: Completely different use cases. Slack is for internal business teams, Discord is for communities (external, public, or semi-public). Discord shouldn't be in your shortlist if you're evaluating business communication tools — it lacks enterprise security features entirely.
Teams vs Discord: No real competition. Teams is enterprise-grade, Discord is community-grade. Some developer-focused teams use both: Teams for internal business, Discord for their external developer community.
Prices verified May 2026. All prices USD, billed annually. Monthly billing costs 15–25% more. PricePulse monitors these tools for pricing changes.
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