Rebus Community is focused on supporting open textbook creation through a collaboration/workflow platform & community.
The Rebus Community software will be a platform to facilitate editorial workflow and collaboration. You can think of our upcoming Projects software as replacing the role of a closed / commercial publisher.
Pressbooks is a book formatting platform. You can think of it as an alternative to software such as InDesign.
Rebus Community does use Pressbooks in its workflow for formatting open textbooks. Pressbooks’ many export formats and cloning capability enable members of the open textbook ecosystem to use all the permissions inherent in the open licenses we use at Rebus.