xmpp free or up

I wonder if there are free xmpp servers, I know a api call "quickblox" that provides xmpp server with its connections.

The list of public servants are:

https://list.jabber.at/

What I would like to know if there is any host that has a built xmpp server (free).

or how I can up a new "myServer" in a host ?

Thanks and regards.