Manage call settings for your workspace or organisation

By default, all members can make calls in Slack using the  phone icon. Depending on your subscription, there are a few ways to customise call settings for your workspace or Enterprise Grid organisation:

  • On all subscriptions, you can enable or disable calls in Slack. 
  • On all subscriptions, you can choose a third-party calling app to display from the phone icon instead of Slack calls.
  • 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.


Enable or disable calls in Slack

By default, members on all subscriptions can make calls in Slack. Owners and admins can manage this setting, which determines whether the phone icon is visible or hidden.

Free, Pro and Business+ subscriptions

Enterprise Grid subscription

  1. From your desktop, click on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Workspace settings.
  3. Next to Calls, click Expand.
  4. Tick or untick the box next to Allow video calls in Slack.
  5. Click Save.

Org owners and org admins can enable or disable calls for every workspace in their Enterprise Grid org:

  1. From your desktop, click on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Organisation settings.
  3. Click  Settings in the left sidebar, then select Organisation settings.
  4. Next to Calls, click Enable or Disable


Select calling apps

By default, clicking the phone icon will start a Slack call. If you want, you can choose a third-party calling app as the default calling option for your workspace or Enterprise Grid org. 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 App Directory and choose a calling app.
  2. Install the app to your workspace.

Step 2: Set a default calling app

Once you’ve installed an app, use the steps below to make it the default calling option for your workspace.

  1. From your desktop, click on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Workspace settings.
  3. Next to Calls, click Expand.
  4. Below Allow video calls in Slack, tick the box next to an 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 the phone icon.

Step 1: Select and install a calling app

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


Step 2: Add a calling app

  1. From your desktop, click on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Workspace settings.
  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.

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 Slack calls and any calling apps installed at the org level as options for the phone icon. These options will be visible to members of all workspaces in an org. 

  1. From your desktop, click on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Organisation settings.
  3. Click  Settings in the left sidebar, then select Organisation settings.
  4. Next to Calls, click Edit.
  5. Below Allow video calls in Slack, check the boxes next to your preferred apps.
  6. Click Save.


Add a calling app at the workspace level

If 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 on your workspace name in the top left.
  2. Select Settings & administration from the menu, then click Workspace settings.
  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:

Step 1: Select and install a calling app

  1. From your desktop, visit the Slack App Directory 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 on your workspace name in the top left.
  2. Select Settings & administration 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?