Gnosi is a local-first, open source workspace: the self-hostable alternative to Notion and Obsidian. Your notes live as portable Markdown, on your machine and on top of your files. No SaaS, no lock-in.
Articles, readings, book quotes, project ideas... lost across folders and different apps.
Related ideas that never meet. Impossible to see the full map of what you know.
Your knowledge trapped on someone else's servers, in proprietary formats you don't control.
A single space that understands your notes, connects them and keeps them always yours.
The same sections you'll find in the app, integrated into a single place
Notes, databases and views
Your ideas, connected
Your address book of people
IMAP with real-time push
Events and agenda
PDF, EPUB and RSS feeds
Post to social media with AI
Your media archive
From capture to connection, all the way to publishing
Notion-style WYSIWYG editor on top of Markdown: slash commands, columns, callouts and embed blocks (PDF, video, web).
Typed fields (status, relation, date, image, author...) and table, gallery, kanban, calendar and timeline views.
Visualize wikilinks and tags as an interactive map (Sigma.js), with AI-assisted semantic connections.
Markdown files you can read and version with any tool. Trash with soft-delete. Zero lock-in.
Citation engine compatible with Zotero (CSL/citeproc), import by DOI/ISBN/arXiv/PMID and APA bibliographies.
Built-in viewer (Zotero engine); your highlights and annotations become reusable citations.
RSS/POP3 subscriptions with hierarchical OPML, full-text extraction, favicons and a clean three-column layout.
IMAP/SMTP client with real-time push (IMAP IDLE) and Google and Microsoft OAuth.
Events in Google Calendar with location autocomplete (OpenStreetMap), travel time and guests.
Address book integrated with mail and calendar.
Post and schedule to Mastodon, Bluesky and Telegram, with AI-generated suggestions tailored to each network.
Publish notes and tables to your Drupal site, in multiple languages, with optimized images and compressed PDFs.
Translate records and entire pages (Softcatalà, local OPUS-MT, DeepL) with language detection and acronym protection.
Insert and manage citations from Microsoft Word (Office Add-in) and LibreOffice Writer with the "Gnosi Cite" extension.
Browsable photo archive with thumbnails (via QuickLook) for video and PDF, and a multi-root manager.
Cloud-agnostic: OneDrive, iCloud, Google Drive or NextCloud. Portable attachments and configurable paths.
Vault file index in the backend, independent of the cloud sync client, backed by Spotlight.
JWT authentication, workspaces and role-based permissions (owner / admin / editor / reader). Disabled in personal mode.
Live presence on the page; the channel is designed for collaborative editing (CRDT) in the next phase.
Powerful when you want it, private by default
Chat with your knowledge. An agent built with LangGraph and tools via MCP that understands @ mentions to your pages, tables and databases.
Run local models with Ollama (free, private) or connect OpenAI, Claude, Groq, Gemini... Your keys, your data, with automatic fallback.
Translate rows, entire pages or in bulk with Softcatalà, local OPUS-MT and DeepL. Language detection and acronym protection.
Local embeddings and vector memory (ChromaDB) that suggest links between notes and enrich your knowledge graph.
This is what Gnosi looks like inside
Markdown notes linked with wikilinks
Your ideas connected, just like in the app
Google Calendar events alongside your notes
Ask in natural language with your vault's context
Start building your second brain in minutes
Add notes, readings and quotes. Import from Notion, Obsidian or any Markdown folder.
Link notes with wikilinks or let the AI suggest connections based on the content.
Navigate your graph, filter by topics and rediscover what you already knew.
You decide where your knowledge lives
Gnosi is just a FastAPI backend + a Vite frontend. Run them directly, no containers.
Prefer a single command, or deploying on a server? Docker bundles backend, frontend and the Zotero translation-server.
All-in-one alternative. Not required to use Gnosi.
Native installers for macOS, Windows and Linux (Electron), with the backend included. No terminal, like Obsidian.
Beta; unsigned builds (on macOS: right-click → Open). Downloads.
Install Gnosi as an application from your browser, with its own window and icon.
Requires a running Gnosi instance (self-host or local development).
Gnosi integrates with the tools you already use
Help keep Gnosi independent and free
Gnosi is an open-source, non-profit project. There is no data collection, no advertising, and no paid licenses. All software is sovereign, designed to run locally on your own files.
However, the ongoing development of Gnosi and the maintenance of the website incur real costs in AI APIs that I personally assume. If you find the tool valuable, we invite you to collaborate on its development or support it financially through these channels:
Send an instant contribution using your mobile number.
Support the project directly with a bank transfer.
Contribute by submitting code, testing new features, opening issues, or improving documentation.
View on GitHubBuild your second brain. Organize your knowledge. And keep it yours.