Definitely looks promising. I love the way it tracks changes and shows you exactly what you did before you save/discard. Also, the whole “planned releases” feature is really well done.
prismic.io is a web software you can use to build and manage any kind of website or app. API-driven, it is the easiest way to integrate your content with no technology or design constraint. It is also the easiest way for content writers to edit, preview and plan updates.