Welcome to your open-source alternative to Obsidian, where privacy, customization, and powerful knowledge management come together.
These tools offer flexible workflows for writers, thinkers, and teams who want full control over their notes, ideas, and data without vendor lock-in.
Appflowy
AppFlowy helps you overcome blank page syndrome with AI-powered drafting, brainstorming, and summarization.
It turns complex data into actionable insights and keeps your work contextually connected across notes and projects.
AppFlowy runs AI models locally for privacy and works offline with no vendor lock-in.
Its mobile apps sync seamlessly so you can work anywhere, and a vibrant community shapes its open, customizable platform.
Joplin
Joplin is an offline-first note and to-do app that prioritizes privacy and data ownership.
It supports end-to-end encrypted syncing across platforms, with markdown-based notes that can include multimedia and math.
Joplin's Web Clipper saves webpages directly to your notebooks, while plugins and themes let you tailor the interface and features.
Collaboration is possible through Joplin Cloud, and your data remains portable and open.
logseq
Logseq is a privacy-first outliner based on Markdown and Org-mode files stored locally.
It helps you connect and query notes to form a web of knowledge, with built-in task management, flashcards, and PDF annotation.
Logseq offers an infinite canvas Whiteboard for visual thinking and supports plugins and themes to customize your workflow.
With encrypted sync, your notes are always under your control, available on desktop and mobile.
Docmost
Docmost is a collaborative wiki and documentation platform for teams and communities, designed to rival commercial SaaS without the lock-in.
It offers real-time editing, rich media, diagrams, spaces for organized content, and fine-grained permissions.
Docmost supports multilingual interfaces and advanced search, with Markdown import/export and inline comments for smooth teamwork.
Notesnook
Notesnook is a truly private note-taking app with end-to-end encryption and no tracking or ads.
It syncs securely across devices and offers a versatile editor for tasks, outlines, formulas, code, and bidirectional linking.
The open-source Web Clipper captures online content privately, and reminders help you stay productive without compromising your data.
Notesnook is trusted by over 140,000 users who value privacy and control.
Reor
Reor is an AI-augmented, local-first personal knowledge manager designed for high-entropy thinkers.
It automatically connects your notes using vector similarity, enabling semantic search and AI-powered conversations with your personal corpus.
Reor runs all models locally, ensuring your data never leaves your device, while its WYSIWYG Markdown editor offers a familiar writing experience.
This collaborative RAG system creates a powerful feedback loop between your ideas and AI assistance for deeper thinking.