[HeralFacker]

I've had WhatsApp for years and while it does ask for contacts, it works just fine if you deny that permission.

[heinrich5991]

Almost. You need a workaround for chatting with new numbers and can't add anyone to groups.

[isametry]

• New numbers: fortunately you can just type the number in.

• Adding to groups: Sharing an invite link is a good workaround, you need to be group admin though.