The collaborative home for living stories
Build a world with people you trust. Branch the story without losing the canon, bring your own AI, and publish every language from one living manuscript.
Human-led. AI-extended. Authorship stays visible.
By morning, the map had redrawn itself. Rivers ran through streets that had never known water, and at the edge of the paper a new coast waited in violet ink.
Lea Mara held the page toward the window. Somewhere beyond the glass, the city was changing to match it.
Many authors.
×Many branches.
×Many intelligences.
×One living book.
One manuscript · many minds
Duofly gives a story enough structure to grow in many directions without sanding away the voice that made it worth reading.
A calm, multiplayer writing space with presence, comments, roles, and revision history.
Explore alternate turns, compare them side by side, and merge only what belongs in the story.
Connect ChatGPT, Claude, Gemini, or your own agent through MCP. Every suggestion arrives as a reviewable proposal.
Keep nine language editions linked to exact source revisions, with outdated passages surfaced automatically.
A library that keeps growing
Published books can reveal selected branches, alternate endings, translation histories, and the people and tools behind every chapter.
LibraryField notes
Practical essays on collaborative craft, narrative systems, translation, and working with AI without giving up creative control.
Read all articlesA practical model for keeping human judgment, provenance, and creative responsibility at the centre.
Read articleWhy narrative branches need proposals, story bibles, and deliberate merges rather than a folder full of copies.
Read articleTreat every language as a living edition connected to meaning, not as a one-off export.
Read articleThe first page is yours
Open the first branch, invite a co-author, and decide together what becomes canon.
Start writing