Invite external organizations to share a channel

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

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


Channel ownership

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

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


Invite other organizations to share a channel

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

Note: If you'd like to invite additional organizations to a channel shared before June 24, 2020, someone from the invited organization will need to allow the channel to be shared with multiple organizations 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. Check the box next to Share outside [your workspace name], then click Next.
  5. Enter the email address(es) 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 Done.
When you share an existing channel, members of other organizations can view the channel’s message history, members, and bots.
  1. From your desktop, open the channel you'd like to share.
  2. Click  Details in the top right.
  3. Click Organizations.
  4. Select Share Channel.
  5. Enter the email address(es) 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 Done.

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 organization 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 organization who has permission to manage shared channels (and possibly someone from the invited organization, depending on their workspace settings).

Note: In the future, we plan to increase the maximum number of organizations that can share a channel. If your team would benefit from working with more than 19 other organizations, 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 plans