How to create a social network using some ready-made service?

Question

CMS

How to create a social a network for a certain topic of people, I already use some kind of service (namely a service and not cms) that will withstand a huge flow of people? For example, for a blog, people can use Tumblr, to unite people in a group on VK or facebook, and to create a simple social network. network, is there a ready solution?

Answer 1

then
bfy.tw/2uNv
https://www.socialgo.com/classic like?

Answer 2

https://ru.wikipedia.org/wiki/Diaspora_%28%D1%81%D...