Is it possible? Yes. Is there a ready solution? Most probably not. Or not for free. JivoChat may be even using Openfire as their backend messaging server. But they have also created a custom web solution (and desktop and mobile clients) on top of that. This is a lot of work and therefore costs. Fastpath looks like very bad option compared to commercial ones. It is old, has lots of bugs and unsupported. Maybe there are some custom solutions based on Openfire that i haven’t heard about, but i doubt they will be for free.