Riffable

Riffable is a collaborative storytelling platform where stories grow one short piece at a time, called Riff. Writers can start a story, continue someone else’s, create alternate paths that branch the narrative. The community helps shape the best versions by voting. Stories can later become books with covers, illustrations, audio, and EPUB export. AI is optional; the core is human collaboration. There's a social aspect to it, author bio, achievements, followers, chats and so on.