Slack
Channels-based team messaging
Microsoft Teams
Collaboration tied to Microsoft 365
Slack is polished, developer-loved, with the best integrations. Teams is bundled 'free' with Microsoft 365 and wins the CIO budget battle in enterprises. For a technical startup, Slack is still better. For a 10k-employee corporation on M365, Teams is the gravity-well choice.
Pick Slack when DX, integrations, and channel-based discussion matter most.
Pick Teams when you're already on Microsoft 365 and want chat bundled with Office + Outlook.
| Feature | 💬Slack | 🟣Microsoft Teams | Winner |
|---|---|---|---|
| Integrations ecosystem | 2500+ apps, dev-friendly | Large, biased to MS | A |
| Video meetings | Huddles (light) | Full conferencing platform | B |
| File collab | Via Drive/Dropbox | Native Office 365 files | B |
| Pricing | $7-15/user standalone | Bundled in M365 E3/E5 | B |
| DX / API quality | Excellent | Graph API (heavier) | A |
| Threading UX | Channel-first threads | Conversation-centric | A |
| Enterprise compliance | SOC2, HIPAA, FedRAMP | M365 compliance suite | Tie |
| Cross-org guests | Connect / Shared Channels | Federation | Tie |
Integrations ecosystem
ASlack
2500+ apps, dev-friendly
Microsoft Teams
Large, biased to MS
Video meetings
BSlack
Huddles (light)
Microsoft Teams
Full conferencing platform
File collab
BSlack
Via Drive/Dropbox
Microsoft Teams
Native Office 365 files
Pricing
BSlack
$7-15/user standalone
Microsoft Teams
Bundled in M365 E3/E5
DX / API quality
ASlack
Excellent
Microsoft Teams
Graph API (heavier)
Threading UX
ASlack
Channel-first threads
Microsoft Teams
Conversation-centric
Enterprise compliance
TieSlack
SOC2, HIPAA, FedRAMP
Microsoft Teams
M365 compliance suite
Cross-org guests
TieSlack
Connect / Shared Channels
Microsoft Teams
Federation
Best for
Best for
For companies consolidating on M365, Teams usually wins. Migration tools (ShareGate, Mover, custom scripts) can port channels and files. Bots and Slack apps need rebuilding against Teams's Graph-based Bot Framework. Inbound: from Teams to Slack, tools exist but are less common — usually requires a services engagement.
Slack is polished, developer-loved, with the best integrations. Teams is bundled 'free' with Microsoft 365 and wins the CIO budget battle in enterprises. For a technical startup, Slack is still better. For a 10k-employee corporation on M365, Teams is the gravity-well choice. In short: Slack — Channels-based team messaging. Microsoft Teams — Collaboration tied to Microsoft 365.
Pick Slack when DX, integrations, and channel-based discussion matter most.
Pick Teams when you're already on Microsoft 365 and want chat bundled with Office + Outlook.
For companies consolidating on M365, Teams usually wins. Migration tools (ShareGate, Mover, custom scripts) can port channels and files. Bots and Slack apps need rebuilding against Teams's Graph-based Bot Framework. Inbound: from Teams to Slack, tools exist but are less common — usually requires a services engagement.
Yes. Both have MCP servers installable via MCPizy (mcpizy install slack and mcpizy install teams). They work identically across Claude Code, Claude Desktop, Cursor, Windsurf, and any other MCP-compatible client. You can install both side by side and route queries in your agent's prompt.
Notion is flexible, modern, combines docs + databases + light project management. Confluence is Atlassian's mature enterprise wiki — tightly tied to Jira, better permissions/compliance, more structured. Startups and product teams prefer Notion; large enterprises with Atlassian stacks stay on Confluence.
Notion is cloud-first, collab-first, with databases and real-time editing. Obsidian is local-first — your notes are plain Markdown files on your disk, extensible with 1500+ community plugins, optional Sync/Publish add-ons. If you value ownership, offline, and customization, Obsidian wins; if you value collab and databases, Notion.
Linear is the fast, opinionated, keyboard-driven issue tracker beloved by modern product teams. Jira is the enterprise standard — heavier, infinitely configurable, mandatory in many orgs. Linear wins for speed and UX; Jira wins for custom workflows, SAFe/scaled-agile, and existing Atlassian stacks.
Not sure? Run both side by side — swap between them in your AI agent with a single config line.