Slack vs Microsoft Teams Pricing: Complete Comparison (2026)

When choosing a workplace communication platform, pricing is often the deciding factor. Slack and Microsoft Teams are the two market leaders, but their pricing models couldn't be more different. This guide breaks down every tier, hidden costs, and total cost of ownership scenarios so you can make the right choice for your team.

Slack vs Microsoft Teams Pricing Comparison

Quick Pricing Snapshot

Slack 2026 Pricing (USD):

Free: $0/month (1 user minimum)
Pro: $8.25/user/month (billed annually, $9.99/month billed monthly)
Business+: $12.50/user/month (billed annually, $15/month billed monthly)
Enterprise Grid: Custom pricing

Microsoft Teams 2026 Pricing (USD):

Free: $0/month (unlimited users)
Standard: $6.50/user/month
Premium: $11/user/month
Enterprise: Custom pricing

The headline difference: Teams' free tier supports unlimited users, while Slack's free plan is limited to 10,000 most recent messages across all channels. But dig deeper, and the pricing story changes dramatically based on how many people you're adding.

Free Tier Comparison

Slack Free ($0)

Unlimited channels and users
Access to 10,000 most recent messages
File storage: 5GB combined across workspace
1:1 and group messaging unlimited
Standard integrations (up to 10)
Workflow Builder with limited automations

Microsoft Teams Free ($0)

Unlimited channels and users
Message history: 1 month (30 days)
File storage: 2GB per user (up to 100GB total)
Unlimited 1:1 and group chat
Video calling: up to 60 minutes (3 people), unlimited 1:1
300 integrations and apps
M365 apps: Word, Excel, PowerPoint web versions included

Winner: Microsoft Teams. Teams' free tier allows unlimited users with significantly better video calling limits and integrated M365 apps. Slack's free plan forces you to pay once you need message history beyond 10,000 messages.

For teams under 10 people with light usage, Teams' free tier is genuinely production-ready. Slack's free tier becomes bottlenecked quickly as message volume grows.

Pro/Standard Tier Comparison (10-50 User Teams)

This is where most SMBs operate.

Slack Pro: $8.25/user/month (annual) = $99/month for 12 users

Unlimited message history
20GB file storage per user
Advanced search
Workflow Builder (advanced automations)
Guest access (up to 5 guests per workspace)
Mobile app priority support
Single Sign-On (SSO)

Microsoft Teams Standard: $6.50/user/month = $78/month for 12 users

Unlimited message history
1TB file storage per user (via OneDrive)
Video: 60-minute group calls, unlimited 1:1
Advanced search
Unlimited integrations and custom apps
Guest access (unlimited from outside org)
SSO included
M365 apps: Word, Excel, PowerPoint, OneNote

Cost difference at 12 users: Slack $99 vs Teams $78 = $21/month ($252/year) in favor of Teams

Cost difference at 50 users: Slack $412.50 vs Teams $325 = $87.50/month ($1,050/year) in favor of Teams

The Teams advantage compounds with headcount because:

1TB file storage per user (Teams Standard) vs 20GB per user (Slack Pro) — Teams saves you from hitting paid upgrade limits
M365 bundle economics — if you're already paying for Microsoft 365 Business Standard ($12.50/user), Teams is often already included (reducing incremental cost to $0)

Pro tip: Check your Microsoft licensing. If you're already on Microsoft 365 Business Standard or Microsoft 365 E3, Teams is often included at no additional cost, making the effective cost $0.

Business/Premium Tier Comparison (50-200 User Teams)

Slack Business+: $12.50/user/month (annual) = $625/month for 50 users

Unlimited everything from Pro
3x advanced integrations (Analytics, custom workflows)
Compliance exports
Security features: IP restrictions, OAuth 2.0
Advanced audit logs
Preferred support

Microsoft Teams Premium: $11/user/month = $550/month for 50 users

Unlimited everything from Standard
Video calling with AI-powered features (background blur, live captions)
Advanced audio/video quality
Intelligent capture for meeting recordings
"Together mode" video layouts
Premium meeting templates
Advanced compliance features
24/7 premium support

Cost difference at 50 users: Slack $625 vs Teams $550 = $75/month ($900/year) in favor of Teams

Cost difference at 100 users: Slack $1,250 vs Teams $1,100 = $150/month ($1,800/year) in favor of Teams

Teams Premium pulls further ahead here because:

AI-powered meeting features (live captions, background blur) are built-in rather than third-party add-ons
Meeting recording storage is generous (OneDrive-backed, up to 1TB per user)
Enterprise integrations come at no extra cost (Slack charges more for advanced apps)

Total Cost of Ownership: Real-World Scenarios

Let's model actual TCO including integrations, apps, and ecosystem costs.

Scenario 1: 25-Person Growth-Stage Startup

Baseline (Slack):

25 users × $8.25 Pro = $206.25/month
Integrations (HubSpot, Jira, GitHub, Salesforce): ~$200/month (paid tiers to unlock advanced features)
Slack App Directory premium apps: ~$100/month
Total: $506/month ($6,072/year)

Baseline (Microsoft Teams):

25 users × $6.50 Standard = $162.50/month
M365 Business Standard (if not already licensed): $12.50 × 25 = $312.50/month
Integrations (HubSpot, Jira, GitHub, Salesforce): ~$100/month (Teams has cheaper/free connectors)
Total: $575/month ($6,900/year) — but M365 provides Word, Excel, Teams all-in-one
If M365 already licensed: $262.50/month ($3,150/year)

Verdict: Teams wins if M365 is already in your stack. Slack wins if you're avoiding Microsoft entirely.

Scenario 2: 100-Person Mid-Market Company

Baseline (Slack):

100 users × $12.50 Business+ = $1,250/month
Advanced integrations, custom bots, compliance tooling: ~$500/month
Slack Connect (partner channels): $1,000/month (for 10 teams)
Total: $2,750/month ($33,000/year)

Baseline (Microsoft Teams):

100 users × $11 Premium = $1,100/month
M365 Business Standard/E3: $12.50–$20/user (assume $15): $1,500/month
Advanced integrations: ~$200/month (Power Automate flows included)
Teams Premium features (meeting governance, recording storage): Included
Total: $2,800/month ($33,600/year)
Core savings if M365 already licensed: $1,300/month ($15,600/year)

Verdict: Essentially tied in total cost, but Teams includes office apps, Teams Premium, and compliance tooling by default. Slack requires building a comparable stack à la carte.

Scenario 3: 500-Person Enterprise

At this scale, both require custom Enterprise Grid/Enterprise licensing.

Slack Enterprise Grid:

Base: $12.50/user/month
Volume discount (typically 15–30%): ~$1,875–$2,625/month for 500 users
Custom integrations, advanced security, audit controls: ~$1,000/month
Slack Connect, priority support: ~$2,000/month
Total: $5,000–$6,500/month ($60,000–$78,000/year)

Microsoft Teams Enterprise (with M365 E5):

M365 E5: $22/user/month × 500 = $11,000/month
Teams Premium features included
Advanced security (DLP, advanced threat protection): Included
Unlimited Teams Channels, Power Automate: Included
Total: $11,000/month ($132,000/year)

Verdict: Slack Enterprise Grid is cheaper for pure messaging at enterprise scale, BUT M365 E5 includes email, Office, Teams, Defender, and compliance all-in-one. Compare to Slack + email (Google Workspace $14/user or Exchange $15/user) + separate security tools, and total cost is similar or higher than M365.

Hidden Costs & Gotchas

Slack Hidden Costs

Guest users: Free outside org, but limited to 5 guests per workspace (upgrade to Enterprise Grid for unlimited)
Message archival: Need paid apps ($100+/month) for compliance/eDiscovery
Video conferencing: Slack video calls are limited to 15 participants; larger meetings require Zoom/Google Meet integration (+$10–30/person/month)
Integrations scale: Advanced integrations (API access, custom workflows) on Business+ tier require Enterprise Grid ($12.50/month minimum)

Teams Hidden Costs

Phone system: Teams Phone requires E5 or add-on ($5–10/user/month) — Slack doesn't have native phone system
Recording storage: Premium/Enterprise Plan recordings stored in OneDrive (1TB per user) — large teams may hit limits
Compliance complexity: Enterprise features (DLP, retention policies) require E5 ($22/user/month), not premium
Video limit quirk: Free tier video calls are 60 minutes for 3+ people (Slack Business+ has no time limit but lower participant limits)

Migration Costs & Switching Friction

From Slack to Teams:

Message history export: Free (manual via Slack admin portal)
Shared channels/Slack Connect relationships: Require rebuilding in Teams
Custom bots/integrations: Some require rewriting (Slack SDK vs Teams SDK)
User training: Teams interface is different; ~2–4 weeks ramp-up
Estimated cost: 5–10 person-days of IT/admin time + user retraining

From Teams to Slack:

M365 integration loss: Requires moving Word collab to separate tool (Google Docs, Notion)
Video conferencing: Slack lacks native phone/PSTN; requires Teams Phone license replacement
Estimated cost: 10–20 person-days (more disruptive due to M365 ecosystem)

Feature Parity Analysis

Communication tools pricing comparison showing Slack, Teams, Discord, Zoom, and Loom monthly per-user costs across free and paid tiers

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Recommendations by Team Size & Use Case

Choose Slack if:

You value best-in-class chat/collaboration UX
You're technology-forward but not M365-invested
You need seamless third-party app ecosystems
Team size < 30 and budget allows per-user costs

Choose Microsoft Teams if:

You're already using M365 Business or Enterprise
You need integrated office tools + chat + video
You want built-in compliance and security features
You value total cost of ownership over feature parity
Team size > 50 (cost advantages compound)

Cost Summary:

Under 20 users: Teams free tier is unbeatable
20–100 users: Teams + M365 Standard typically 20–30% cheaper than Slack + tools
100–500 users: Slack Business+ ($1,250/100 users) vs Teams Premium + M365 ($2,800/100 users), but Teams includes everything
500+ users: Slack Enterprise Grid vs M365 E5 — roughly equivalent all-in cost, but Teams ecosystem is more unified

Conclusion

The "cheaper" platform depends entirely on what you already own. If you're already invested in Microsoft 365, switching to Teams is an obvious financial win. If you're building a fresh tech stack, Slack's per-user pricing ($8.25 at scale) is attractive, but add up integrations, apps, and video conferencing, and Teams' integrated approach often wins on TCO.

For head-to-head comparison, check out our Slack vs Microsoft Teams comparison page for an interactive side-by-side breakdown of all features and pricing tiers.

Slack vs Microsoft Teams Pricing: Complete Comparison (2026)