Discord doesn't just have servers and one-to-one DMs. You can also create group DMs (and calls), allowing you to send messages to multiple people at once without being in a server. There are two limits:
To add a friend to a group, it's very simple. The "Add Friends to DM" button is located in the top right-hand corner of your Discord client (on both desktop and mobile), click that, and then type the name of the friend you wish to add. In the below image, we have highlighted the button you must click.
In order to remove a person from a Discord group, you must be group owner (the person who created the group).
Right click on the name of the person you want to remove in the list of group members on the right of the group, and click "Remove From Group", as is highlighted in this image:
Roles can be used to assign group-based permissions.Read More
It's easier than you might think.Read More
A guide to making exclusive channels in your Discord server.Read More