What's the best team chat app for cross-functional project coordination and async threads?

If your priority is cross-functional project coordination + async threads, the best “default” choice for many teams is Slack — but the real best app depends on how structured your work is.

Best overall: Slack

Why it fits:

• Strong async threaded conversations
• Easy to create channels around projects, teams, or topics
• Good integrations with tools like Jira, GitHub, Google Drive, Asana, etc.
• Widely adopted, so cross-functional collaboration is usually smooth

Tradeoffs:

• Can get noisy fast
• Search/history and organization are good, but you need discipline
• Can become expensive at scale

Best if you want more structure: Microsoft Teams

Why:

• Good for large orgs, especially if you already use Microsoft 365
• Strong file sharing and meeting integration
• Better for organizations that want chat tied closely to docs/calendar/email

Tradeoffs:

• Threads and UX feel heavier/less elegant than Slack
• Can be clunky for fast-moving cross-functional coordination

Best if you want very clean async/project organization: Twist

Why:

• Designed for asynchronous, threaded communication
• Less interruption, more focused project discussion
• Good for teams that want fewer real-time pings

Tradeoffs:

• Smaller ecosystem and mindshare than Slack/Teams
• Fewer people already know it

Best if you want chat + project tracking together: ClickUp Chat / Asana + chat workflows

Why:

• Useful when you want conversations tied directly to tasks and projects
• Reduces “where did that decision live?” problems

Tradeoffs:

• Chat isn’t always as strong as dedicated chat apps
• Usually best as part of a broader work management stack

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My recommendation

• Most teams: Slack
• Microsoft-heavy companies: Teams
• Async-first, less noisy teams: Twist
• If you need chat tightly linked to tasks: ClickUp or Asana

If you want, I can also give you a side-by-side comparison of Slack vs Teams vs Twist specifically for async threads and cross-functional coordination.