Story architecture for writers
Plotheus is the structured world-layer for authors. Track every character, relationship, and chapter state so your drafts never contradict themselves. Write with confidence, solo or with AI assistance.
Live: tag characters, places & events right in your prose
How it works
Five moves. No spreadsheets, no wiki-wormholes, just a world that grows as you write.
Choose a structure preset (Book, Memoir, Screenplay, Game Narrative, and more) or start from scratch. Plotheus sets up a hierarchy tailored to your format.
Define your world's building blocks (Characters, Places, Events, Items) with custom fields. Each type becomes a reusable template.
Create instances and connect them with rich, typed relationships. Containment, alliances, conflicts: all structured and searchable.
Writing Chapter 12? Plotheus gathers every character, relationship, and event up to that point into a single view. See exactly what your world looks like at any moment in your narrative.
Export prose and world data in multiple formats. Share read-only links with beta readers or editors. And if you use AI writing tools, copy your world context to give them the full picture.
Try it now
Drag through the Epic of Gilgamesh and watch the world-state snapshot update: who is alive, what has changed, which bonds exist, exactly as your draft knows it.
Move the slider to jump to any chapter.
Relationships ignite as the story reaches them.
Who it's for
Whether you draft your first novel or maintain a saga spanning hundreds of chapters, Plotheus bends to your process.
Pick a template and start writing. Plotheus gives you a ready-made structure and guides you through building your world, step by step.
Full control over your world's structure. Define exactly what you need to track (character traits, location details, relationship dynamics), your way.
Keep your story consistent across hundreds of chapters. Your world graph always knows the latest state of every character and relationship.
Organize the people, places, and events from your life into a structured timeline, perfect for memoirs, biographies, and creative nonfiction.
Map factions, locations, NPCs, and lore into an interconnected graph that stays internally consistent, whether you run sessions or build settings.
FAQ
Absolutely. Plotheus is a powerful story-organization tool on its own. The world graph, relationship tracking, and structured hierarchy work whether or not you ever connect an AI.
Most AI memory tools store your story as machine-readable chunks you can't read or edit, and they only work with the AI they were built for. Plotheus keeps your world as structured, human-readable data you fully own. Swap between ChatGPT, Claude, Gemini, or any other AI freely, and actually explore and edit the world yourself.
Plotheus combines Plot + Prometheus. In Greek myth, Prometheus brought fire to humanity. Plotheus brings that same clarity to your narrative: a structured, illuminated view of your story world that keeps every detail consistent across chapters.
Prometheus brought fire to humanity. Plotheus brings it to your draft. Create a free account and give your world the structure it deserves.