Wiki & links
Structure local files into a browsable wiki with wikilinks between concepts.
Phase 1 · Desktop app available
Sharpen your thinking.
A local-first private assistant for Markdown and wiki: scan your library, read in-app, and ask with citations.
Your knowledge stays yours
Notes stay on your device and paths you control. Work offline; no one else can read your raw files.
Your workflow is unique
Combine wiki, outline, Reader, and Ask the way you research and write.
Your corpus should last
Local-first, portable files—stay in control and avoid vendor lock-in.
Spark ideas
Graph & context
See how pieces connect—search and graph views help surface hidden threads.
Built-in Reader
Open Markdown and wiki pages with outline navigation and wikilinks—aligned with Ask citations.
Ask with evidence
Ask in the workbench; answers can cite sources you can open in Reader.
Local-first, under your control
Unlike a pure web app, BigBrain mounts folders on disk and runs the scanner and Reader—core to Phase 1.
- Bind a private library folder; first and incremental scans run in the desktop client.
- Private originals are not uploaded by default; processing stays in environments you choose.
- Model and quota metering follows your account—see Pricing and Privacy.
Trust & data
Your private originals are not uploaded by default; processing stays in environments you control. We prioritize your sovereignty over raw data.
See Privacy.
Getting started
- Get the macOS or Windows installer from the download page.
- Sign in, create or bind a private folder.
- Pick a model, add files, run the first scan.
- Ask questions in the workbench; answers cite sources; knowledge stays in wiki.
Phase 1 → Phase 6
- Phase 1: local private client & wiki (current).
- Phase 2–3: richer retrieval and orchestration.
- Phase 4–6: shared network, community, long-term programs.
Milestones follow official announcements.
FAQ preview
Why a desktop app? Phase 1 needs local folders, scanning, and the reader—hard to do in a browser alone.
Are private files uploaded? Not by default. See Privacy and the full FAQ.
Ready to start?
Download the desktop app, or create an account to use one identity everywhere.
Deploy marketing and app on separate domains; set download URLs and NEXT_PUBLIC_CLIENT_VERSION; set VITE_PUBLIC_WWW_BASE_URL in the desktop build to this site for in-app help links.