Logseq

Open source outliner for notes and knowledge graphs

Open Source AGPL-3.0
  • Windows
  • macOS
  • Linux
  • Android
  • iOS

Official website →

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Overview

Logseq began as an open source project focused on outliner-style note-taking, drawing inspiration from tools like Roam Research and TiddlyWiki but committing to local-first, plain-text storage from the start. Rather than a proprietary database like Notion’s, Logseq notes are stored as ordinary Markdown or Org-mode files on the user’s own device, which means they remain readable and portable even without the app, and can be synced through any file-syncing tool the user already trusts.

The project is released under the AGPL-3.0 license and is developed openly, with a company (Logseq Inc.) funding core development while keeping the client free to use. Its outliner model — every line is a bullet that can be collapsed, referenced, and linked — combined with automatic backlinks makes it well suited to networked note-taking, journaling, and building a personal knowledge graph, though it lacks the structured relational databases and polished template ecosystem Notion offers.

Key Features

  • Local-first storage — Notes saved as plain Markdown/Org files on your own device
  • Outliner structure — Every note is built from nested, collapsible bullets
  • Bi-directional linking — Automatic backlinks between pages that reference each other
  • Daily journal — A running daily notes page as the default entry point
  • Knowledge graph view — Visualize connections between notes
  • Plugin ecosystem — Community plugins for extending functionality
  • Optional end-to-end encrypted sync — Paid sync service, though local storage works without it

Use Cases

  • Personal knowledge management — Building a linked, searchable second brain
  • Daily journaling — Quick daily notes that link to broader topics over time
  • Privacy-conscious note-taking — Keeping notes as local files instead of a vendor’s cloud database
  • Researchers and writers — Organizing ideas through backlinks rather than folders

Who It’s For

Logseq is for people who want Notion-style networked note-taking without giving up ownership of their data. It suits privacy-conscious users, researchers, and anyone who prefers plain-text files they can read, back up, or migrate away from at any time, though teams needing Notion’s structured databases and collaboration polish may find it a bigger adjustment.

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This is a free alternative to: Notion, Obsidian