I created a diagram of this stack..
@dejfcold Pleroma is the closest you can get. It has swappable frontends, though most are focused on microblogging.
@sean is working on a frontend for more long form blogging that he’s said is supposed to be Diaspora-like. I’ve heard of various frontends that were Instagram-like, but haven’t seen any recently.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!