New features over Free plan is
Hosted on your url - Make sure your customers never leave their experience of your site by putting it on your own domain, at a URL such as http://support.yourcompany.com/. Get all the search engine optimization (SEO) benefits of having all this great content pointing customers back to your own site.
Private forums - Ability to limit forum access by email or email mask
User enabled moderation - Users can report spam,inapropriate comments and feedback and you moderate reported items from admin interface
Simp plan enabled in Free trial mode now it's will be active until we add payment gateway
Customer support service by UserEcho