Best for developer-tool-heavy stacks
Try SlackIf your daily work goes through Linear, GitHub, Notion, Datadog, Vercel, or Sentry, Slack's integration catalog is the deepest in this category. Slack Pro at $7.25/user/mo annual is more expensive than Teams Essentials at $4 but the productivity lift from native first-party integrations rather than Power Automate workarounds is real.
The trade: More expensive than Teams Essentials. No bundled meetings beyond huddles for groups (you still need Zoom or Google Meet for external presentations). Free tier limited to 90-day history.
The upside: The chat UX is calmer than Teams once you have tuned notifications. Native huddles for spontaneous voice, Slack AI delivers useful summarization, and Slack Connect for cross-company collaboration is unmatched. For engineering-led teams not anchored to Microsoft 365, Slack still wins on day-to-day fit.
Strengths
- +Deepest third-party integration catalog
- +Calmer chat UX after notification tuning
- +Native huddles for spontaneous voice
- +Slack AI delivers useful summarization
Trade-offs
- −More expensive than Teams Essentials
- −No bundled meetings beyond huddles for groups
- −Free tier limited to 90-day history
- Pro
- $7.25/user/mo annual
- Free
- 90-day history, 1:1 huddles
- Business+
- $15/user/mo
- Pricing verified
- 2026-05-03
Migration steps
- Audit Teams channels and pick the top 30 to recreate as Slack channels.
- Migrate message history with a tool like Reach if compliance requires it.
- Reinstall the developer-tool integrations natively in Slack (most are first-party).
- Run a 2-week parallel period before sunsetting Teams to catch missing handoffs.
Not for: Skip Slack if your finance team has signed a multi-year M365 contract; Teams is bundled at zero marginal cost.
Paid plans from $8.75/mo