Curators are the gatekeepers of a GreenHouse. They choose who should be members, experts, or guests, and approve the flow of solutions.
Members are the builders of a GreenHouse. They can view the entire GreenHouse, as well as participate in the screening, reviewing and addition of solutions.
Innovators / Solution owners can only view and edit their own entries, respond to messages, and respond to posts in which they are tagged.
Experts are specially invited to provide an opinion on specific solutions or answer member queries. They can only see solutions that are ready to review, posts tagging them, and when they are tagged in a comment of any solution.
Guests are specially invited for a limited period of time, and can only view solutions, comments and posts that they have been tagged in.