Free
Solo writers exploring the craft.
$0/mo
- 1 vault
- 250 entities per vault
- Bring your own AI key
- Text only
- No export
A writing room for series-length fiction
World-Builder turns markdown into a relational world: graph of every character, multi-track timeline, interactive map, wiki you can edit, and a visible AI context pack so the assistant never forgets your rules.
Your novel is a folder of markdown files with frontmatter. Open it anywhere, version-control it, never lock it in.
Every character, location, faction, and event in a force-directed graph you can navigate.
Faction tracks, era bands, fictional calendars. Click any event to see its details and links.
Drop your own map image, place markers, paint faction territories — all driven by frontmatter.
Beats → context pack → AI draft → continuity check → approval. Every step visible, every step yours.
Bring your own Anthropic, OpenAI, or Ollama keys. Hosted AI on paid plans for those who'd rather not.
Start free. Upgrade when your series outgrows the limits.
Solo writers exploring the craft.
Serious novelists with a full series in mind.
Writing rooms, ghostwriters, and production teams.