Though SE5 has been announced by Webligo, the SocialEngine team has also mentioned that they will continue to sell, support, optimize and improve SE4.

Website owners and administrators who want to self-host their community and want the entire codebase on their own server should still find SocialEngine 4 as the best platform out there.

We will continue supporting our SocialEngine 4 plugins, developing new plugins for SE4 and enhancing our existing plugins. We've got some new releases coming up soon!