Set up an announcement-only channel

Announcement-only channels are a great way to broadcast key information to everyone in Slack by limiting who can post to them. This type of channel becomes a read-only channel to anyone without permission to post.

  • On the Free, Standard, and Plus plans, only the #general channel can be made an announcement-only channel.
  • On the Enterprise Grid plan, any shared channel within the org can be an announcement-only channel. 

When a channel's posting permissions are limited, members will see a message like this instead of a message field:


Note: Members can still create a thread in order to respond to posts in an announcement-only channel. 

Set up an announcement-only channel

Free, Standard, and Plus plans

Enterprise Grid plan

  1. From your desktop, click your workspace name in the top left.
  2. Select Administration, then Workspace settings from the menu.
  3. Click the Permissions tab.
  4. Next to Messaging, click Expand.
  5. Under People who can post to #general, make your selection.
  6. Click Save.


Workspace Owners can decide who can post in a specific channel on the workspace. Here's how:

  1. Open a shared channel.
  2. Click the   gear icon to open the Channel Settings menu.
  3. Select Additional options.
  4. Under Manage posting permissions, choose who can post in the shared channel. 
  5. Tick the box next to Allow members to start message threads if you'd like to allow people to add threaded replies to messages posted in this channel.
  6. Click Review, then Set posting permissions.


Org Owners and Org Admins must first create a default shared channel on the org. Then, set the posting permissions to make it an announcement-only channel. 

  1. From your desktop, click your workspace name in the top left.
  2. Click Administration, then Organization settings.
  3. Click  Settings on the Admin Dashboard.
  4. Click Shared Channel Settings
  5. Under Default Channels, click Add a channel, choose a new default channel, then click Next. Or, hover over an existing channel, click the  three dots icon, and click Edit channel settings.
  6. Choose a membership type and who can post in the channel. You can also allow members to start message threads, if you'd like.
  7. Click Next, then click Save.

Note: It's not currently possible to set posting permissions on non-shared channels. 

Who can use this feature?
  • Workspace Owners or Org Owners can access this feature.
  • Available on all plans.

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