Note: To use shared channels, both workspaces must be on a paid plan. If you're using the free version of Slack, learn how to upgrade your workspace.
Who can create shared channels
Everyone (except guests) can send and accept an invitation to share a channel with another organization.
Before a channel is shared, the request to share it must be approved by someone from each organization with permission to manage shared channels. View Create shared channels to learn more.
How to work in shared channels
Shared channels are a lot like other channels in Slack, but there are some differences to keep in mind. Here’s what to expect when you work in a shared channel.
Identify a shared channel
A shared channel will have a diamond icon next to the channel name, and the external organization's name will appear above the message field.
View a member's profile and status
Members of a shared channel can see each other’s profiles and profile photos. When working with external members, you'll see their organization's Slack icon on their profile photos, and they'll see yours too. Keep in mind that only members of your workspace can see if you’ve set a status in Slack.
Use custom emoji
Members of the other workspace in your shared channel can only see your workspace’s custom emoji when they’re used as emoji reactions. Members outside of your workspace won’t see your custom emoji in their emoji picker or be able to see them if included in a message.
Use apps and integrations
You can use apps and integrations in shared channels just like any other channel. All members can see messages from bots and apps, and even message another workspace’s bot user if it’s been added to the channel.
Keep in mind that your slash commands will only work in your workspace, and that members of the other organization can't use shortcuts for third-party apps that have been connected to your workspace.
Shared channels and Enterprise Key Management (EKM)
Enterprise Key Management customers will be able to use shared channels; however, messages and files sent in shared channels are not currently encryptable using your own keys.
Messages and files in all other channels within Slack will still be encrypted using your keys. Once EKM becomes supported across shared channels, EKM will retroactively apply to all your messages and files in shared channels.