Slack vs Microsoft Teams (2026): Trust Score, TCO & Integration Compared
⚡ Quick Verdict
Slack is the stronger choice if you prioritize trust, security, and data privacy (Trust Score: 7/10 vs 6.2/10). For deeper integration ecosystems and API flexibility, Slack has the edge (Integration Score: 9.5/10).
📊 Comparison Overview
Slack and Microsoft Teams serve overlapping but distinct needs in the Collaboration space. Slack achieves a Trust Score of 7/10, while Microsoft Teams scores 6.2/10 — a difference of 0.8 points. On integration depth, Slack leads with 9.5/10 vs 7.8/10 (difference: 1.7 points). When it comes to total cost of ownership, Microsoft Teams is more budget-friendly at $96/year vs $192/year per seat. Slack is the recommended choice if trust, security, and vendor reputation are your primary concerns. However, the right choice depends on your specific team size, existing tool ecosystem, and budget constraints.
Side-by-Side Score Comparison
| Metric | Slack | Microsoft Teams |
|---|---|---|
| Trust Score | 7/10 🏆 | 6.2/10 |
| Integration Score | 9.5/10 🏆 | 7.8/10 |
| Est. TCO / yr | $192 | $96 🏆 |
| Price | $8/subscription | $4/subscription |
| Category | Collaboration | Collaboration |
Feature Comparison
Slack Features
- Channels
- Direct Messages
- Huddles
- Canvas
- Workflow Builder
- Slack Connect
Microsoft Teams Features
- Channels
- Video Meetings
- Office Integration
- SharePoint
- Tasks by Planner
- Apps
Best For
Slack
Team communicationRemote/hybrid teamsIntegration-heavy workflows
Slack is a team messaging and collaboration platform owned by Salesforce. It organizes conversations into channels for different topics, projects, or teams. Slack's key differentiator is its massive i... Read full review →
Microsoft Teams
Enterprise organizationsOffice 365 shopsLarge team collaboration
Microsoft Teams is a collaboration platform that combines chat, video calls, file storage, and Office 365 integration. It is widely adopted by enterprises using Microsoft 365. Teams offers channels or... Read full review →
Verdict
Slack wins on trust, security, and data practices with a Trust Score of 7/10. Slack wins on integration depth and ecosystem connectivity. For budget-conscious teams, Microsoft Teams offers the lower total cost of ownership at $96/year vs $192/year.
The right choice depends on your team's priorities. If you value privacy, ethical AI, and vendor transparency, choose Slack. If you need deep API integrations and a large app ecosystem, choose Slack.