FAQ
Short answers to the questions that come up most.
Is it really free?+
Yes. Nautilus is MIT-licensed with no paid tier, no account and no backend to charge for. AI features use your own provider key, so any cost there is between you and the provider — and two of the four providers have a free tier.
Where are my diagrams stored?+
In your browser's local storage, plus whatever you export. Clearing site data deletes them. Autosave is a convenience, not a backup.
Can other people see my share links?+
Anyone holding the link can open the diagram — the whole thing is encoded in the URL. Treat share links as unlisted, not private.
Does the simulation model latency or load?+
No. It animates dependency order, which is a structural check rather than a performance model.
Does Nautilus send my data anywhere?+
The app makes no network calls of its own. The only outbound requests are AI calls you explicitly trigger, sent straight to the provider you selected.
Can I use it offline?+
Yes — run it locally with npx or the desktop build. Everything except the AI assistant works without a network.
Does it work on mobile?+
The editor is desktop-first and shows a disclaimer on small screens. Reading a shared diagram works; drawing on a phone is not a good time yet.
How do I report a security issue?+
Privately, through GitHub Security Advisories — see SECURITY.md in the repository. Please don't open a public issue.