Create an announcement-only channel

By limiting who can post, announcement-only channels are a great way to broadcast information to everyone in Slack. This type of channel becomes read-only to anyone without permission to post. Instead of the message field, members will see a message like this: Screen_Shot_2018-06-07_at_10.56.04_AM.png


Set up an announcement-only channel

Free, Standard and Plus subscriptions

Enterprise Grid subscription

On the Free, Standard and Plus subscriptions, only the #general channel can be set as an announcement-only channel. If you’re a workspace owner, here’s how to set one up and decide who can post in it:

  1. From your desktop, click your workspace name in the top left.
    "workspace_menu/
  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.

A channel must be shared across an org to be set as announcement-only. In default channels, members can use threads to reply to any messages posted to the channel. 

Workspace level

At the workspace level, org owners and admins can create announcement-only channels and decide who can post in them. If an org owner or admin allows certain members to create shared channels, these members can create announcement-only channels too. 

For those with permission, here’s how to set one up:

  1. Open a shared channel.
  2. Click the cog 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. If it’s a default channel, you can tick the box next to Allow members to start message threads. This allows people to add threaded replies to messages posted in this channel.
  6. Click Review, then Set posting permissions.

Org level

At the org level, org owners and admins can create announcement-only channels. To do so, first create an org-wide shared channel, then set the posting permissions to an announcement-only:

  1. From your desktop, click your workspace name in the top left.
    "workspace_menu/
  2. Click Administration, then Organisation 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. Alternatively, 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. For a default channel, you can also allow members to start message threads if you 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 and org owners/admins
  • Free, Standard, Plus and Enterprise Grid subscriptions

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