The AI Story OS
for Novelists.
Alex has already read your manuscript. Your world is mapped. Ghost suggestions are one keystroke away.
No credit card · 14-day trial · 100 AI credits
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.
“The AI has no idea who Nadia is. Every session I'm re-explaining my characters from scratch.”
Reads your entire manuscript before it says a word. Knows your characters, your world, your open threads.
“AI suggestions sound nothing like me. My editor could spot them from a mile away.”
Press Ctrl+K. The AI is trained on your existing chapters — every suggestion in your voice.
“I planted a mysterious object in Chapter 3. By Chapter 22, it was completely forgotten.”
Every plot thread tracked automatically. Nothing introduced in your story goes unresolved.
“I renamed a character. I caught 43 of the 47 instances. The other four made it to my editor.”
Rename once. It propagates everywhere — preserving voice, tense, and context.
The tools serious
novelists reach for.
No GPT wrapper. No prompt box. Real tools built for long-form fiction.
Alex — Your Co-Author
Co-AuthorAlex reads your entire manuscript before it says a word. Ask anything — who Nadia is, what's in Chapter 3, which threads are unresolved. Every answer is grounded in your actual story.
Ghost Writing
AI WritingPress Ctrl+K. Describe what you want to happen. The AI writes it in your voice — trained on your existing chapters, not a generic model. Tab to accept, Esc to dismiss.
World Board
World BuildingEvery character, location, and faction extracted as you write. Your story's universe mapped automatically into a live knowledge graph — no spreadsheets required.
Story Bible
Plot IntelPlot threads, style notes, and your writer's intent — all tracked automatically. Nothing introduced in your manuscript disappears without a trace.
Global Replace
EditingRename a character once. It propagates everywhere — preserving voice, tense, and context across your entire manuscript automatically.
From blank page
to finished draft.
No download. No configuration. Sign up, open the studio, and write.
Free in 10 seconds
No credit card. No download. Open your browser, sign up, pick your genre — your project is ready before you've finished your coffee.
A sample story loads instantly
"The Glass Meridian" — a thriller with 4 chapters, pre-seeded characters, and Alex already reading. The tutorial walks you through every feature in about 2 minutes.
Open the studio
Import your chapters or start fresh. Alex adapts to whatever you're writing. Ghost suggestions on demand. World Board building in the background. Story Bible always up to date.
Finish the draft
Stay in the flow. Press Ctrl+K when you're stuck. Ask Alex anything. When you're done, your manuscript is saved and organised — ready for the next session.
Questions & answers.
Something else? Email us →
Is Xvault Studio free to start?
Yes. Sign up in 10 seconds — no credit card needed. You get 100 AI credits and 14 days of full access. After your trial, the free plan gives you continued access with a smaller monthly credit allowance. Paid plans with higher limits are coming at full launch.
Yes. Sign up in 10 seconds — no credit card needed. You get 100 AI credits and 14 days of full access. After your trial, the free plan gives you continued access with a smaller monthly credit allowance. Paid plans with higher limits are coming at full launch.
Sign up in 10 seconds. 100 AI credits and 14 days of full access — no card needed. Upgrade when your manuscript demands it.