Manage third-party calling app settings

In addition to Slack huddles, you can choose a third-party calling app as an additional calling option for your workspace or Enterprise Grid organisation. 

• When you enable a third-party calling app, members can start a call from the channel header (in channels) and the  phone icon (in direct messages).
• On the Pro, Business+ and Enterprise Grid subscriptions, you can choose to make multiple third-party calling apps available from the  phone icon, in addition to Slack calls. You can also allow outbound phone calls with certain apps.

Note: Slack permits phone calls, but only via a third-party provider and app. You will need to contract Internet or telecommunications services from them directly. Slack does not charge you for using these integrations.

Select third-party calling apps

Keep in mind that choosing a third-party app may require you and your members to create an account with that service.

Free subscription

Pro and Business+ subscriptions

Enterprise Grid subscription

Step 1: Select and install a calling app

1. From your desktop, visit the Slack Marketplace and choose a calling app.
2. Install the app to your workspace.
   
   

Step 2: Set a third-party calling app

Once you’ve installed an app, use the steps below to make it available in Slack.

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Next to Third-party call providers, click Expand.
4. Below Calling options, tick the box next to your preferred app.
5. Click Save.

On the Pro and Business+ subscriptions, workspace owners and admins can select multiple third-party calling apps for members to choose from.

Step 1: Select and install a calling app

1. From your desktop, visit the Slack Marketplace and choose a calling app.
2. Install the app to your workspace.

Step 2: Add a calling app

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Next to Third-party call providers, click Expand.
4. Below Calling options, tick the box next to your preferred apps.
5. Click Save.

On the Enterprise Grid subscription, certain apps can be installed at the org level. Other apps can be approved at the org level for workspace owners and admins to install to their workspaces.

Add a calling app at the org level

Org owners and admins can set any third-party calling apps installed at the org level as options alongside huddles. These options will be visible to members of all workspaces in an Enterprise Grid organisation.

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Organisation settings.
3. Click  Settings in the left sidebar, then select Organisation settings.
4. Next to Third-party call providers, click Edit.
5. Below Calling options, tick the boxes next to your preferred apps.
6. Click Save.

Add a calling app at the workspace level

If third-party calling apps haven’t been added at the org level, workspace owners and admins can install approved calling apps to their workspaces, then add them as an option for members to choose from the  phone icon.

1. From your desktop, click your workspace name in the sidebar.
   
2. Hover over Tools & settings, then click Workspace settings. (If you manage more than one workspace, choose one from the drop-down menu.)
3. Next to Calls, click Expand.
4. Below Allow video calls in Slack, tick the boxes next to your preferred calling options.
5. Click Save.

Allow outbound phone calls

On the Pro, Business+ and Enterprise Grid subscriptions, you can call phone numbers using third-party apps from direct messages (DMs) in Slack. The following apps support making outbound calls:

• Cisco Webex meetings
• Dialpad
• Fuze
• RingCentral
• Zoom

Step 1: Select and install a calling app

1. From your desktop, visit the Slack Marketplace and choose a calling app.
2. Install the app to your workspace.
   
   

Step 2: Allow outbound calls

Once you’ve selected and installed a third-party calling app, use the steps below to make it available from the  phone icon and allow outbound calling from DMs.

1. From your desktop, click your workspace name in the sidebar.
   
2. Select Tools & settings from the menu, then click Workspace settings.
3. Next to Calls, click Expand.
4. Below Allow phone number calls in Slack, tick the boxes next to your preferred apps.
5. Click Save.

Note: If you’re on the Enterprise Grid subscription, follow these steps for each workspace in your org where you’d like to allow outbound phone calls.

Who can use this feature?

• Workspace owners/admins and org owners/admins
• Available on all subscriptions