Sometimes, in a group chat, you may want to talk to a few friends privately without others knowing. Instead of opening another group chat, Circlet's 'sub-group' feature allows whispering within the same group chat. You can define multiple sub-groups in a group and use them as needed.
Additionally, Circlet provides an 'excluding' feature in group chats, allowing you to exclude some friends from seeing specific messages without them knowing. For instance, you can discuss birthday presents for a friend in a group chat while excluding her from those messages.