Turn private intelligence into lucid clarity.

The private Markdown workspace with AI that actually reads your notes.
 Your files on disk. Your server. Your models. No lock-in, ever.

Self-host Lumynn See what’s inside
Plain-text Markdown files on your disk
Self-hosted. Any server, NAS, or VPS.
Multi-user with full isolation
Installable PWA on phone & desktop
Works with any OpenAI-compatible provider

Your knowledge is private intelligence.
Treat it like it is.

Most AI tools send your notes to someone else’s servers. Lumynn never does. Everything stays on hardware you control. The AI only ever sees what you explicitly let it see through grounded retrieval.

Files that outlive any company

Markdown on disk is the only format that will still be readable in 2040 without a vendor. No proprietary database. No export theater.

AI that is actually grounded in your work

RAG + agent chat cite real passages from your library. When the model proposes an edit, you review and accept it into the real file.

BUILT FOR PEOPLE WHO THINK IN PUBLIC (OR PRIVATE)

The workspace, re-imagined for ownership + intelligence.

Filesystem source of truth

Point Lumynn at any folder of Markdown files (or an existing Obsidian vault). Edits are atomic writes to real .md files. No sync surprises.

Grounded Copilot

Ask questions, attach specific notes with @, get answers with citations you can click to open. The agent can propose precise edits you approve.

Modern editor, real preview

Multi-tab, WYSIWYG + source modes, Obsidian embeds, math, tasks, wikilinks. All rendered cleanly. Per-tab edit/preview state.

RAG that you actually control

Configure any OpenAI-compatible embedding and chat endpoint (local Ollama, vLLM, OpenAI, etc.). Incremental indexing. Test jobs. Exportable (secrets redacted).

Multi-user, zero leakage

Each person gets their own isolated library, vector index, and provider keys. Admins cannot read user data. Perfect for families, labs, small teams.

Native everywhere

Full PWA. Mobile feels like a native app (editor-first, drawers, swipe-to-close, pull-to-search, undo toasts). Works great on desktop too.

Real interface. No marketing renderings.

Three-pane workspace, Copilot, mobile flows. Exactly what you get when you run it.

Lumynn workspace: library tree on left, editor in center, Copilot agent on right, dark theme
Desktop workspace: library, multi-tab editor, grounded agent chat
Lumynn login and light theme workspace view
Light theme (warm sand): same power, paper-like reading
Lumynn on mobile: clean editor-first experience with bottom navigation
Mobile PWA: editor always front and center, library and Ask in drawers

For people whose notes actually matter.

Researchers. Writers. Developers. Anyone building a body of work that needs to stay private, searchable, and useful for decades. Not just until the next SaaS pricing change.

  • Your second brain belongs on hardware you own.
  • AI is only valuable when it can’t hallucinate your own research.
  • Plain text is the ultimate vendor escape hatch.
  • Teams deserve isolation without giving a third party the keys.

Get started in minutes.

Lumynn is a Node.js + React web app. Point it at a folder of Markdown files and you’re running.

  1. Clone or deploy the server (Docker, VPS, NAS, or even a laptop on your LAN).
  2. Set ALLOWED_VAULT_ROOTS and a strong session secret. First login creates the admin account.
  3. Point it at any existing Markdown folder (or start fresh). Configure an embedding + chat provider if you want the AI features.

Full instructions, server.sh helper, and production hardening notes live in the repository.

View source & deploy guide Read the story

No sign-up. No telemetry. Your instance, your rules.

Your notes deserve better than someone else’s cloud.

Start with Lumynn today.

Self-host Lumynn