I share with you a guide I did to install matrix server https://github.com/guifi-exo/wiki/blob/master/howto/matrix-riot.md#install-on-debian-9-stretch-2017-10-06 feedback/contributions welcome Here you have a small presentation about what is it: https://github.com/guifi-exo/wiki/blob/master/howto/matrix-riot.md#presentation