Stratum

Your second brain. No strings attached.

A personal knowledge management system that doesn't own your notes. Every note is a plain .md file on disk. No proprietary format. No cloud lock-in. Just you, your ideas, and a tool that gets out of your way.

Think Logseq's block outliner meets Obsidian's graph view, built on a Rust engine that stays fast even with 10,000+ notes — all running fully offline.

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Why Stratum?

Your notes should outlive your note-taking app. Most PKM tools either lock you into a proprietary format, require a cloud subscription, or slow down as your knowledge grows. Stratum was built differently from the ground up.

• Plain Markdown files — open any note in any text editor. If Stratum disappeared tomorrow, you'd lose nothing.
• Fully offline — every feature works without internet. AI too (bring your own Ollama).
• Fast at scale — search in under 100ms at 10k notes. The editor doesn't stutter. The graph doesn't lag.
• Zero vendor lock-in — no proprietary database, no cloud sync dependency. Your .md files are portable by design.

At a Glance

🧱 Block Outliner	Every paragraph is an addressable block. Indent, outdent, drag, collapse.
🔗 Wiki-Links	[[Link]] with autocomplete, backlinks panel, and unlinked mentions.
🕸️ Knowledge Graph	Interactive force-directed graph. Find orphans, explore clusters.
🔍 Full-Text Search	Sub-100ms search. Tag search with #tagname.
📊 Datalog Queries	Query your knowledge graph like a database.
📅 Daily Journal	Auto-created daily notes. Capture fast, process later.
📋 Templates	Reusable templates with variable substitution.
🃏 Flashcards	Spaced repetition from your notes. Write once, remember forever.
🎨 Whiteboards	Excalidraw spatial canvas for visual thinking.
🧮 Math & Diagrams	KaTeX equations and Mermaid diagrams inline.
🤖 AI Assistant	Rewrite, summarize, interlink. Bring your own LLM.
🌐 Web Research	Multi-depth web research via SearXNG.
🔄 Git Sync	Auto-commit, push, pull. Version history built in.
⌨️ CLI	Full terminal interface — init, search, export, and more.

Quick Start

Nix (recommended)

nix develop ./nix
cargo build --workspace
npm install
cargo tauri dev

Manual

Requires Rust 1.75+, Node.js 22+, and Tauri v2 system libraries (install guide).

cargo build --workspace
npm install
npm run tauri:dev

Get Involved

Stratum is in active development — all core features work, and there's plenty more to build. Check the full documentation for setup guides, feature walkthroughs, and the CLI reference.

Contributions welcome. See CONTRIBUTING for the development workflow and conventions.

License

AGPL-3.0-only — see LICENSE.