Logseq

Active

Country: United States (US)
Founded: 2020
Developer: Logseq team (open-source community)
Pricing: Free (open-source)
Open source: Yes
Platforms: macOS, Windows, Linux, iOS, Android, Web

Indexes

Note-Taking PKM/Second Brain To-Do/Task Management

Overview

Logseq is a privacy-first, open-source platform for personal and team knowledge management that stores all notes as local Markdown or Org-mode files without requiring cloud accounts or vendor lock-in. The application uses a block-based outliner structure where every bullet point functions as a discrete unit that can be linked, tagged, queried, or embedded anywhere in the knowledge base. Bidirectional links automatically connect pages and blocks, creating an interactive graph that visualizes how ideas relate. Beyond note-taking, Logseq supports PDF annotation, built-in flashcards with spaced repetition, and Datalog-powered queries for filtering content across large knowledge bases.

Key Features

Block-based outliner - Every bullet point is a discrete unit that can be independently linked, tagged, queried, or embedded across the knowledge base.
Bidirectional linking - Automatic backlinks connect pages and blocks, surfacing relationships between ideas in an interactive graph view.
Daily journal pages - Dedicated daily logging functionality for capturing thoughts, tasks, and ideas with automatic date-based organization.
PDF annotation - Built-in tools for annotating and highlighting PDF documents within the application.
Spaced repetition flashcards - Create and review flashcards with spaced repetition algorithms for learning and retention.
Datalog queries - Powerful query language for filtering and retrieving content across thousands of pages based on custom criteria.
Local file storage - All notes store as plain Markdown or Org-mode files on your device with no cloud requirement.
Git integration - Auto-commit notes to Git repositories for version control and backup.
Plugin system - User-authored plugins with a built-in marketplace for extending functionality.
Graph visualization - Interactive visual representation of how pages and blocks connect throughout your knowledge base.

Pricing

Plan	Price	Includes
Free (Open Source)	$0	All core features including outliner, bidirectional linking, PDF annotation, flashcards, queries, local storage, and plugin system.

Platforms & Requirements

Logseq runs on macOS, Windows, Linux, iOS, and Android as native applications, with web access available. The application performs optimally for knowledge bases up to approximately 2,000 pages; performance degrades noticeably beyond this threshold, though a new SQLite-backed database version released in 2025-2026 addresses these limitations. Linux users can install via FlatPak, and all builds are available on GitHub.

Integrations & Ecosystem

Git version control and auto-commit
Markdown file format import/export
Org-mode file format support
GitHub/GitLab repository integration
Local file system backup
Voice note recording (mobile)
PDF import and annotation

Alternatives

App	Difference
Obsidian	Obsidian is prose-focused with faster performance and deeper customization options, while Logseq emphasizes outliner-based structure and daily journaling.
Notion	Notion offers collaborative team features and cloud-based storage with structured databases, whereas Logseq prioritizes local-first privacy and individual knowledge management.
Roam Research	Roam Research is a commercial networked note-taking tool with similar bidirectional linking features but requires cloud accounts and paid subscriptions, while Logseq is free and open-source.
Org Roam	Org Roam is an Emacs-based knowledge management system for users already in the Emacs ecosystem, while Logseq provides a standalone cross-platform application with a graphical interface.

Reputation

Logseq is perceived as a capable open-source alternative to commercial note-taking and knowledge management tools, particularly valued by developers, researchers, and students who prefer local-first privacy and structured outlining. The application is praised for its block-based architecture, bidirectional linking, and lack of vendor lock-in, making it appealing to users seeking control over their data. Criticisms include performance degradation with large knowledge bases (though addressed by recent architectural updates) and a steeper learning curve compared to simpler note-taking apps. The active development and community support position it as a serious contender in the personal knowledge management space.

Sources (7)