Mariana Outlook vs Slack
Side-by-side comparison of two Model Context Protocol servers. Pick the right one for Claude Desktop, Claude Code, or Cursor.
Gives Claude Code access to Outlook Mail, Calendar, and Contacts via Microsoft Graph, with safety-first defaults (no sending, no hard deletes, every mutation lo
Comparison
| Feature | Mariana Outlook | Slack |
|---|---|---|
| Pricing | Free | Free |
| Installs | — | 1 |
| Rating | — | — |
| Verified | — | — |
| Hosted | — | Hosted |
| Tools | — | 4 |
| Category | communication | communication |
| Author | marianasmall | Slack |
| Repo | marianasmall/mariana-outlook-mcp | korotovsky/slack-mcp-server |
When to pick Mariana Outlook
Gives Claude Code access to Outlook Mail, Calendar, and Contacts via Microsoft Graph, with safety-first defaults (no sending, no hard deletes, every mutation logged). Supports multiple Microsoft accounts through a PKCE OAuth flow.
When to pick Slack
Bring your Slack into Claude. Catch up on channels, search history, send messages and summarize long threads.
Looking for something else? Browse all MCPs or check trending this week.