Privately makes it possible to have in-depth discussions with your Twitter followers. Whenever you engage in a dialog on Twitter you will notice how hard it is to keep it going. The 140 character-limited and the fact the conversation is public can make it hard to really dive deep into a topic. Switching over to email is an option, but Privately aims to be an easier solution. You simply send the person you’re tweeting with a private URL where the two of you can continue the discussion. No sign up necessary, everything works via Twitter. Better yet, you can invite multiple people to join the discussion.