The AI Story OS
for Novelists.
Free — 300 AI credits included. No card needed.
Most writing tools
forget everything.
XVault remembers it all.
A narrative operating system that lives alongside your draft — indexing, cross-referencing, and recalling every detail automatically.
Your manuscript,
fully indexed.
As you write, XVault extracts every character, location, object, and event — then builds a living knowledge graph. No manual Codex needed. No copy-pasting lore. Just write.
Marcus reached into his coat for the silver pendant he'd carried since childhood. The cold weight was a comfort against the chaos of Veldris.
Plot holes caught
before they're written.
XVault reads your entire manuscript before every session. Introduce a silver pendant in Chapter 5 without setting it up first? Flagged instantly, with context and a fix suggestion.
The fog rolled in from the north, carrying with it the scent of—
Your voice,
accelerated.
Cursor-style ghost suggestions that complete your sentences — trained on your prose patterns, not a generic model. Accept with Tab. Stay in the flow. Ship the draft.
Writing long-form fiction
without the right tools
is self-sabotage.
Every novelist hits these walls. We built XVault to tear them down, one problem at a time.
“I renamed a character everywhere… except the 47 places I missed.”
Finds every instance across your entire manuscript automatically.
“The AI writes suggestions that sound nothing like me.”
Trained on your existing chapters. Every word in your voice and rhythm.
“I planted a mysterious key in Chapter 2. By Chapter 22, it was gone.”
Nothing introduced in your story slips through unresolved.
“I sit down to write and spend the first 25 minutes getting into the zone.”
F11. Full screen. Word goal. Ambience. Deep work, instantly.
The tools serious
novelists reach for.
No GPT wrapper. No prompt box. Real tools built for long-form fiction.
Story Bible & Entity Graph
KnowledgeEvery character, location, and object extracted as you write. Your story’s universe organized automatically into a live knowledge graph — no spreadsheets needed.
Dead Branch Detection
Plot IntelIntroduced something in Chapter 3 that never pays off? XVault flags it before it ever becomes a plot hole. No checklist required.
Ghost Writing
AI WritingAI suggestions that sound exactly like you. Trained on your existing chapters — every sentence in your voice, your rhythm, your style.
Global Replace
EditingRename a character once. It propagates everywhere — preserving voice, tense, and context across your entire manuscript automatically.
Sprint Mode
FocusFull-screen writing with a live word goal, countdown timer, and ambience player. Hit F11 to enter the zone and stay there.
From blank page
to finished draft.
No configuration. No tutorials. Open the app, paste in your chapters, and write.
Download in 30 seconds
A 47 MB native app. Mac, Windows, Linux. No cloud setup, no account required — open it and start writing.
Bring your world
Import existing chapters or start fresh. XVault extracts entities immediately and builds your knowledge graph as you type.
Write. Let it help.
Real-time ghost suggestions, continuity alerts, and a story bible that updates as you write. Stay in the flow — always.
Ship your draft
Export clean PDF, DOCX, or EPUB with one click. Your manuscript, publisher-ready, exactly as you wrote it.
Questions & answers.
Something else? Email us →
Is XVault Studio free to start?
Yes. Download and start writing immediately with 300 free AI credits — no credit card needed. After your trial, the free tier gives you 50 AI credits per month. Upgrade anytime for more credits and advanced AI models.
Yes. Download and start writing immediately with 300 free AI credits — no credit card needed. After your trial, the free tier gives you 50 AI credits per month. Upgrade anytime for more credits and advanced AI models.
Free to download. 300 AI credits and 14 days of full access — no card needed. Upgrade when your manuscript demands it.