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Whispers in Slack

Slack How-To Guide
Updated 2026

🤫 Whispers in Slack

Direct Answer / Summary:

To set up a private whistleblower hotline in Slack, install OpenSay from opensay.co (free tier & trial available). Whispers allow employees to report sensitive compliance, HR, or safety issues privately to designated reviewers with two-way anonymous threaded replies.

Whispers are private messages, anonymous or not, that can be sent from any workspace member to a private channel ("whisper channel") where only specific persons are in - for example, leadership or HR team.

A thread is shared between the whisperer and members of the whisper channel - so both parties can reply anonymously and form a communication channel.

For example:

Anonymous Whisper in Slack

It is great for private suggestion boxes, ways to raise concerns or simply to allow private anonymous thoughts in private channels

For example, Human Resources (HR) can create a new private channel named #whisper-to-hr, invite only HR personnel and capture concerns and thoughts from the team with anonymous whispers.

On the same note:

  • R&D can create #whisper-to-rnd.
  • Marketing can create #whisper-to-marketing.
  • Executives can create #whisper-to-executives.
  • Management can create #whisper-suggestions or #private-suggestion-box.
  • etc.

You can also enable anonymous whispers for already existing private channels.


Ready to use this in your Slack workspace?

Install OpenSay to enable anonymous messages, polls, whispers, and psychological safety in Slack in under 60 seconds.