Gnosi is unclaimed —

Gnosi

Your digital second brain, sovereign and open source·gnosi.temenosismael.org

Gnosi is a local-first, open source workspace positioned as a self-hostable alternative to Notion and Obsidian. It combines notes, databases, a knowledge graph, a reference manager, mail, calendar and AI features on top of the user's own Markdown files. It runs as a self-hosted FastAPI backend with a Vite frontend, with optional desktop (Electron) and PWA installations.

What it's for

Taking and linking notes with a Notion-style block editorBuilding a personal knowledge graph of wikilinks and tagsManaging academic citations and bibliographies compatible with ZoteroReading and annotating PDFs and EPUBs and turning them into structured notesFollowing RSS/POP3 feedsSending and receiving email via IMAP/SMTPManaging a calendar synced with Google CalendarScheduling and posting to social media (Mastodon, Bluesky, Telegram)Publishing notes and tables to a Drupal siteTranslating notes and pagesChatting with an AI agent about your own notes and documentsInserting citations into Word or LibreOffice documents from a Gnosi vaultClipping web pages into a Gnosi vault via a browser extension

Features 23

AI 'Brain' that converts PDFs, EPUBs or links into structured notes with citations
Built-in PDF/EPUB reader with highlights turned into citations
Calendar integrated with Google Calendar including travel time and guests
Contacts address book integrated with mail and calendar
Conversational AI agent with @ mentions to pages, tables and databases
IMAP/SMTP mail client with real-time push and OAuth login
Import references by DOI/ISBN/arXiv/PMID with APA bibliographies
Interactive knowledge graph (Sigma.js) with AI-assisted semantic connections
Local vault file search index
Local-first AI via Ollama or external providers with automatic fallback
Machine translation of records and pages
Media Center for browsing photos, video and PDFs
Multi-cloud storage support (OneDrive, iCloud, Google Drive, NextCloud)
Notion-style block editor with slash commands, columns and callouts
Portable Markdown files with soft-delete trash
Real-time collaborative editing (CRDT) planned
Reference manager compatible with Zotero (CSL/citeproc)
Role-based workspace accounts (beta, optional team mode)
RSS/POP3 reader with OPML import and full-text extraction
Social media scheduling and AI-generated post suggestions
Sync and publish notes/tables to a Drupal site
Typed databases with table, gallery, kanban, calendar and timeline views
Word and LibreOffice citation add-in (Gnosi Cite)

At a glance

free tieropen sourceself-hostableAPI

TypeWeb app

DeploymentSelf-hosted

PlatformsWeb, Windows, macOS, Linux

LanguagesEnglish, Catalan, Spanish

Forsmall associations, cooperatives, NGOs, companies, researchers

CompanyIsmael Garcia Fernandez

Integrations

GmailGoogle CalendarNotionObsidianZoteroMastodonBlueskyTelegramDrupalOneDriveiCloudGoogle DriveNextCloudMicrosoft WordLibreOffice WriterOllamaOpenAIClaudeGroqGoogle GeminiMistralDeepSeekCohereOpenRouterPerplexityDeepLSoftcatalàOPUS-MT

Resources

Pricing

The product itself is free and open-source; only optional deployment/consulting services for teams and cooperatives are quote-based, with no listed prices. Voluntary support is possible via GitHub Sponsors and Ko-fi donations.

Self-hosted (Open Source)Free

Core software is free, open-source and self-hostable; no cost stated for running it yourself.

Assisted Deployment (Pilot / tailored)Quote

Quote-based; pricing not publicly listed.

Teams & Cooperatives (B2B) (Custom / consulting)Quote

Quote-based; pricing not publicly listed.