We’re at ORBISIUS have recently launched a new business called https://WPDemo.net
WPDemo.net is for WordPress theme designers and plugin developers that want to allow potential customers test drive their WordPress plugins or themes. With our service they can have separate/private & temp demo WP sites (hosted by us) that users can try developer and designer products both on the frontend and the backend with full admin access but without being able to download any of your code as user’s can’t install plugins/themes or edit them so the code is safe. By using our hosted product demo service they don’t risk somebody hacking into outdated demo sites and then getting into your main site and causing all kinds of troubles.
The full list of requirements is here: