Invite external organisations to share a channel

You can work with external organisations in Slack by inviting them to share a channel, allowing you to collaborate and share information without ever leaving your workspaces. There are three steps to sharing a channel:

Note: To share a channel, every participating organisation must be using one of Slack’s paid subscriptions. If you're using the free version of Slack, learn how to upgrade your workspace.


Channel ownership

A shared channel is owned by the organisation that created it. Only the channel owner can do the following:

  • Invite external organisations to share the channel.
  • Remove organisations from the channel.
  • Continue using the channel if it’s no longer shared (the channel will be archived for external organisations).


Invite other organisations to share a channel

Your organisation can share one of its channels with other organisations. You can create and share a new channel, or share one that already exists. Make sure that you have the contact information of someone from each organisation that you’d like to invite.

Note: If you'd like to invite additional organisations to a channel shared before 24th June 2020, someone from the invited organisation will need to allow the channel to be shared with multiple organisations first. 

Create a new channel

Share an existing channel

  1. Click the  plus icon next to Channels in the left sidebar.
  2. Select Create a channel.
  3. Enter a channel name and a description, and decide if you’d like to make the channel private. For more details, see Create a channel.
  4. Tick the box next to Share outside [your workspace name], then click Next.
  5. Enter the email address(es) that you’d like to send an invitation link to, then click Send. Or click Copy share link to share an invitation link outside of Slack.
  6. Click Finished.
When you share an existing channel, members of other organisations can view the channel’s message history, members and bots.
  1. From your desktop, open the channel that you'd like to share.
  2. Click  Details in the top right.
  3. Click Organisations.
  4. Select Share channel.
  5. Enter the email address(es) that you’d like to send an invitation link to, then click Send. Or click Copy share link to share an invitation link outside of Slack.
  6. Click Finished.

Keep in mind that invitation links expire after seven days. If an invitation expires before it’s accepted or approved, you can copy a new invitation link to share.

If you've sent an invitation link but change your mind before it's been accepted, ask an owner or admin to write in to us. We'll revoke the invitation for you.


What’s next?

  • Anyone who receives your invitation to share a channel can choose to accept or decline it. For more details on how the invited organisation can do this, visit Accept an invitation to share a channel.

  • When someone accepts your invitation to share a channel, it must be approved by someone from your organisation who has permission to manage shared channels (and possibly someone from the invited organisation, depending on their workspace settings).

Note: In the future, we plan to increase the maximum number of organisations that can share a channel. If your team would benefit from working with more than 19 other organisations, reach out to us – we’d love to learn more!

Who can use this feature?
  • All members (but not guests)
  • Standard, Plus and Enterprise Grid subscriptions