511 votesDaniel commented
I can't believe there is only 247 people asking for this, seems to be an essential feature with the emphasis on a delightful mobile experience these days. Similar functionality as attaching a file to a conversation just uploading to files.
We acknowledge the customer demand for Private Channels and have been hard at work on it. Private Channels is currently in preview with a select group of customers. We expect to release the feature to the public later this Fall, and will update here when we are starting to roll out to all customers. We appreciate all the feedback you have provided to us on this forum and thank you for your patience.