But Layer will host it for you: you give them your data. That's more what the open standard http://matrix.org is trying to do: basically learn on what is missing from XMPP to be a better fit to today's communication: no single point of control, synced history, groupd chat as first class citizen... It aims to be pragmatic, with a distributed architecture and end to end encryption. Anyone can build a client or server (and host it) or use the open APIs to connect to the Matrix ecosystem. SAme disclaimer as ara4n: I work with MAtrix, but we're non-profit and just trying to fix this mess...
Thanks, we've started with XMPP, like many others, but it was not fitting our purpose, like for others, so instead of building our proprietary protocol (like others did) we tried to build on what we learnt and provide something others would like to use. The beta is almost feature complete now and we need enlighten feedbacks to make it fit most purposes and something everyone would find useful!