Quick Pricing Overview
⚠️ Key Insight: 50-person team switching from Slack ($7,500-12,000/yr) to Teams Essentials ($2,400/yr) saves $5,100-9,600 annually. If already using Microsoft 365, Teams is free.
Detailed Pricing Breakdown
Slack Pricing
Slack is a standalone communication tool with per-user-per-month pricing:
- Free: 90-day message history, 1:1 DMs only, limited integrations (2 apps)
- Pro: $12.50/user/month (billed annually at $150/user, ~$12.50/mo) — unlimited message history, all channels, 10 integrations
- Business+: $18/user/month — unlimited integrations, advanced admin controls, analytics, SAML SSO
- Enterprise Grid: Custom pricing — for 500+ users, isolation, advanced security, dedicated support
Hidden costs: Slack Apps (Slack Bot Builder, workflow automation) can cost $10-50/mo. Slack Connect for cross-organization messaging ($0.50-1.00 per partner connection). Premium integrations through Zapier, Make, or other tools.
Microsoft Teams Pricing
Teams can be purchased standalone or bundled within Microsoft 365. Pricing varies by approach:
- Free: Up to 100 participants, 60-minute group call limit, limited history (18 months searchable)
- Teams Essentials: $4/user/month (standalone) — unlimited 1:1 calls, unlimited group calls (60+ participants), full history
- Microsoft 365 Business Basic: $6/user/month — Teams Essentials + email, 1 TB storage, Office apps (web only)
- Microsoft 365 Business Standard: $12.50/user/month — Teams + email + Office (desktop apps)
- Microsoft 365 Business Premium: $22/user/month — above + advanced security, Windows Copilot
- Enterprise (E1/E3/E5): Custom pricing — includes Teams, email, advanced features
Hidden costs: Teams Phone System ($10-12/user/month for PSTN/voice calling). Teams Premium (premium app features) $10/user/month. Minimal marketplace overhead compared to Slack.
Real Cost Models for Different Team Sizes
10-Person Team (small company)
| Platform |
Monthly Cost |
Annual Cost |
Per-Person Cost |
Notes |
| Slack Pro |
$125/mo |
$1,500/yr |
$12.50/person |
Unlimited history, all features |
| Teams Essentials |
$40/mo |
$480/yr |
$4/person |
3.1x cheaper than Slack |
| Teams + M365 Basic |
$60/mo |
$720/yr |
$6/person |
Teams + email + Office (web) |
| Slack + Zapier Pro |
$175/mo |
$2,100/yr |
$17.50/person |
Slack + workflow automation |
Verdict for 10-person teams: Teams Essentials is unbeatable at $4/user. Even if you're already using Microsoft 365, Teams is included at no extra cost.
20-Person Team (growth-stage SaaS)
| Platform |
Monthly Cost |
Annual Cost |
Per-Person Cost |
Notes |
| Slack Pro |
$250/mo |
$3,000/yr |
$12.50/person |
Industry standard for startups |
| Slack Business+ |
$360/mo |
$4,320/yr |
$18/person |
Advanced admin controls, analytics |
| Teams Essentials |
$80/mo |
$960/yr |
$4/person |
3.1x cheaper than Slack Pro |
| Teams + M365 Business Standard |
$250/mo |
$3,000/yr |
$12.50/person |
Teams + email + Office desktop apps |
| If already using M365: |
$0/mo |
$0/yr |
Included |
Teams is FREE if M365 is your email |
Verdict for 20-person teams: Standalone Teams Essentials saves 70% vs Slack. If already in the Microsoft 365 ecosystem (email, Office), Teams is included — your switching cost is zero.
50-Person Team (scale-up)
| Platform |
Monthly Cost |
Annual Cost |
Per-Person Cost |
Notes |
| Slack Pro |
$625/mo |
$7,500/yr |
$12.50/person |
Standard Slack deployment |
| Slack Business+ |
$900/mo |
$10,800/yr |
$18/person |
Advanced features, analytics |
| Teams Essentials |
$200/mo |
$2,400/yr |
$4/person |
3.1x cheaper than Slack Pro |
| Teams + M365 Business Standard |
$625/mo |
$7,500/yr |
$12.50/person |
Teams + email + full Office suite |
| If already using M365: |
$0/mo |
$0/yr |
Included |
Save $7,500/yr by switching |
Verdict for 50-person teams: A company already on Microsoft 365 can save $7,500-10,800/year by using Teams instead of Slack. Even as a standalone tool, Teams Essentials is 3x cheaper.
Feature Comparison
| Feature |
Slack |
Microsoft Teams |
| Instant Messaging |
✓ Excellent UX |
✓ Good |
| Channels & Organization |
✓ Simple, intuitive |
✓ Hierarchical (Teams > Channels) |
| Video Calls (1:1) |
✓ Native |
✓ Native |
| Video Calls (Group) |
✓ Unlimited (Pro+) |
✓ Unlimited (free+) |
| Screen Sharing |
✓ Native |
✓ Native |
| Message Search |
✓ Excellent |
✓ Good |
| File Storage Integration |
✓ Limited (100MB file max) |
✓ SharePoint integration (1 TB/user) |
| Email Integration |
✗ Via apps/integrations |
✓ Native (Outlook) |
| Calendar Integration |
~ Limited (bot-based) |
✓ Native (Outlook Calendar) |
| App Ecosystem |
✓ 1000+ apps (most comprehensive) |
✓ Growing (500+ apps) |
| Workflow Automation |
✓ Native (Slack Workflow Builder) |
✓ Native (Power Automate) |
| Meeting Recording |
~ Limited (no local save) |
✓ Full (OneDrive storage) |
| Live Captions |
~ Limited |
✓ Native (11 languages) |
| Mobile Apps |
✓ Excellent |
✓ Good |
| Guest Access |
✓ Allowed |
✓ Allowed |
| SSO & Security |
✓ Business+ ($18/user) |
✓ Most plans included |
Key Insights: When to Choose Each Platform
Choose Slack If:
✓ You want the best user experience (Slack's interface is unmatched)
✓ You need maximum third-party integrations (1000+ apps available)
✓ You're not using Microsoft 365 (single email provider)
✓ You have budget flexibility (Slack costs more but feels premium)
✓ Your team lives in terminal/dev tools (Slack bots are common)
✓ You want best message search (critical for large message archives)
Slack is best for: Startups with budget, creative teams, tech-first companies, teams that don't use Microsoft tools, and orgs where communication is central to culture.
Choose Microsoft Teams If:
✓ You're already using Microsoft 365 (Teams is free/included)
✓ You need email + messaging in one place
✓ You want SharePoint/file collaboration (1 TB storage per user)
✓ You need enterprise security & compliance (built-in by default)
✓ Your team is 50+ people (cost matters, Teams saves thousands)
✓ You want native meeting recording & transcription
Teams is best for: Enterprises using Microsoft ecosystem, companies prioritizing cost, teams needing integrated email/chat/files, and orgs with 50+ employees where ROI is clear.
Hidden Costs & Gotchas
Slack Hidden Costs:
- Free tier is useless: 90-day history + no channel archive = you'll lose data. Most teams immediately go Pro.
- File storage is expensive: Slack includes 20GB for Pro, $0.50/GB overages. Large teams quickly hit $100+/mo in storage costs.
- App integration costs: Slack apps (Zapier, Make, custom integrations) can cost $10-50/mo each. Common setup: Slack + Zapier ($49/mo) = $25/person/mo for a 10-person team.
- Slack Connect (cross-org messaging): $0.50-1.00 per partner connection/mo. If you have 20 partner orgs: +$10-20/mo.
- Sticky switching cost: Slack is so integrated into workflows that teams rarely switch, even when cost justifies it.
Microsoft Teams Hidden Costs:
- Free tier limitations: 60-minute group call limit, no recording storage, limited history. Most teams need paid plans.
- Phone System costs: If you want Teams Phone (PSTN/voice calling), add $10-12/user/month. Many teams budget for this separately.
- Teams Premium: $10/user/month for premium avatars, filters, live captions. Most teams skip it.
- Power Automate costs: Advanced automation can trigger per-action charges beyond M365 limits.
- Microsoft learning curve: Teams Essentials is cheap, but the broader Microsoft ecosystem (Copilot, advanced features) costs more. Easy to upsell into higher tiers.
Cost Optimization Tips
For Slack Teams:
- Audit free file storage first. Delete old files, compress archives. $500+/yr in storage savings per large team.
- Limit integrations: Each Zapier/Make integration = $10-50/mo. Stick to native Slack Workflow Builder (free).
- Evaluate switching to Teams if 30+ people: At 30 users, Slack costs $3,750/yr. Teams Essentials = $1,440/yr. Break-even at ~18-20 users.
- Negotiate volume discounts: Slack enterprise teams (500+) can get 15-20% discounts. Always ask.
For Microsoft Teams Teams:
- Use free Teams Essentials for small teams (under 10). Saves $1,200+/yr vs Slack Pro.
- Don't upgrade to Business Standard unless you need desktop Office. Business Basic ($6/user) gives Teams + email + web Office (90% of teams don't need the 10%).
- If already using M365 email: Teams is free. Not using Teams is leaving money on the table.
- Skip Teams Premium (avatars, filters) unless your culture specifically values it. Saves $5,000+/yr for a 50-person team.
Slack to Teams Migration Guide
If you're evaluating a switch, here's what to expect:
Data Migration
- Message history: Both Slack and Teams allow bulk exports. Budget 1-2 hours for a 10-person team (larger = more time).
- Files: Slack files export to ZIP. Teams stores in SharePoint. Manual upload or use 3rd-party migration tools (Mover, ArcTurnus) for $500-2,000 one-time.
- Workspace structure: Slack channels = Teams channels. Mapping is 1:1. Usually takes 1-2 hours to recreate 50 channels.
Integration Re-Setup
- Slack apps → Teams apps: Many popular apps (Jira, Salesforce, GitHub) have Teams versions. Some have direct connectors; others require webhook rewiring. Budget 2-4 hours.
- Bots: Slack Workflow Builder = Power Automate. Some workflows map 1:1; complex ones need redesign. Budget 4-8 hours per major workflow.
- Webhooks & APIs: If you've built custom integrations on Slack, Teams uses different webhook formats. Minimal rework (2-4 hours).
Team Training & Adoption
- Learning curve: Slack → Teams takes 1-2 days average. The UX is different (channels organized in Teams, not flat). Larger teams need more onboarding.
- Resistance to change: Slack's UX is beloved. Some teams will resist. Plan for 2-3 weeks of adoption friction before full productivity.
- Hybrid period: Running both systems for 2-4 weeks is common. Plan for message duplication and confusion. Not recommended for >1 month.
Cost Calculation for Migration
Typical project:
- Data export/import: 2-4 hours @ $100/hr = $200-400
- Integration re-setup: 4-8 hours @ $100/hr = $400-800
- Team training: 1-2 days @ $100/hr = $800-1,600
- Total cost: $1,400-2,800
- Annual savings (50-person team switching from Slack to Teams): $5,100-9,600
- Payback period: 2-4 weeks
Calculate Your Communication Tool Costs
Use our Team Cost Dashboard to see exactly how much Slack vs Teams costs for your team size.
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Related Pricing Guides
Want more tool comparisons? Check out these posts:
Frequently Asked Questions
Q: Is Teams cheaper than Slack?
Yes, significantly. Teams Essentials is $4/user/month vs Slack Pro at $12.50/user/month. If you're already using Microsoft 365, Teams is free. A 50-person team saves $5,100-9,600/year by switching.
Q: Can I use Teams if I'm not using Microsoft 365?
Yes. Teams Essentials ($4/user/month) is a standalone product. You don't need an Microsoft 365 subscription. However, the ROI is better if you're already in the Microsoft ecosystem.
Q: Why is Slack so expensive?
Slack charges for its exceptional UX and deep integrations. $12.50/user/month reflects the brand value. For small teams (10-20 people), the expense is justified if communication is critical. For larger teams, cost becomes the primary factor.
Q: Is it hard to switch from Slack to Teams?
Not very hard. Data migration takes 1-4 hours (depending on history volume). Integration re-setup takes 4-8 hours. Team training/adoption takes 2-3 weeks. Total project cost: $1,400-2,800. With payback in 2-4 weeks, it's worth it for large teams.
Q: Which platform has better integrations?
Slack has 1000+ integrations. Teams has 500+. For most common tools (Jira, Salesforce, GitHub, Zapier), both have parity. Slack wins for niche/developer tools. Teams wins for Microsoft ecosystem tools.
Q: Do I have to use Teams if I'm on Microsoft 365?
No, you can still use Slack as your communication tool. But you're paying for Teams in your Microsoft 365 subscription whether you use it or not. At least test Teams before committing to Slack.
Q: What's better for remote teams?
Both are excellent. Slack has better async culture (threaded messages, searchability). Teams has better meeting features (recording, live captions, noise suppression). For fully remote teams, it's a tie.
Q: Can I run both Slack and Teams?
Yes, but not recommended. Running both creates confusion (which platform for which conversations?), duplicate messages, and wasted time switching. Pick one, go all-in.
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