Obsidian vs Logseq vs Joplin – Best Open Source Notes App

Your notes are the record of how you think. Pick the wrong app and you’re locked into a format you can’t leave, or stuck paying a subscription for files that should be yours. The good news is that the best note-taking apps in 2026 are all local-first: your data lives in plain Markdown files on your own machine, exportable whenever you want. The question is which one fits the way you actually work. Obsidian, Logseq and Joplin are the three names that come up most often — free, cross-platform, and built around plain files. But they approach note-taking very differently, and the right choice depends on whether you think in documents, in blocks, or in sync-anchored notebooks.

Obsidian — The Powerhouse Vault

Obsidian is the app that turned knowledge management into a mainstream hobby. It stores everything in a local folder — your “vault” — of plain Markdown files, then layers a graph view, backlinks and an enormous plugin ecosystem on top. It feels like writing in a blank editor until you start linking notes, and then the whole vault becomes navigable by association rather than by folder.

Its defining feature is the bidirectional linking model. Write [[another note]] and Obsidian builds a web of connections you can explore visually on the graph. The backlinks panel shows every note that references the current one, which turns scattered ideas into an interconnected database over time.

• Storage — local plain Markdown files; sync and publish are paid add-ons.
• Linking — bidirectional [[links]], backlinks, graph view, tags.
• Extensibility — over 2,000 community plugins and themes from its marketplace.
• Platforms — Windows, macOS, Linux, Android, iOS.
• Licence — proprietary (free for personal use, paid for commercial use).

Obsidian is genuinely powerful, but it is not open source. The core is proprietary, and it is free only for personal, non-commercial use. If you need a fully open licence this is the one to skip.

Logseq — The Outliner for Systems Thinkers

Logseq takes a different route: instead of documents, everything is a hierarchy of blocks. You write your notes as nested bullet points, each block an addressable unit you can reference, move and link individually. It is purpose-built for journaling, Zettelkasten-style note systems and anyone who prefers structure over prose.

The block-based model is the biggest shift. Every bullet is a node you can link to by unique ID, embed inside another page, or pull into a daily journal. The built-in journal’s daily timeline means you can capture ideas quickly and let Logseq’s graph and backlinks tie them together later. Markdown stays the underlying format, so your data remains yours.

• Storage — local Markdown, block-based; optional cloud sync is a paid feature.
• Model — outliner with nested blocks, each individually linkable and embeddable.
• Workflow — daily journal first, flashcards, PDF annotation, whiteboards.
• Platforms — Windows, macOS, Linux, Android, iOS; web app too.
• Licence — AGPL-3.0, genuinely open source.

Logseq is the strongest choice if your notes are more network than narrative — tasks, references and ideas that connect rather than pages of flowing text.

Joplin — The Private, Sync-Everywhere Workhorse

Joplin is the dependable option: a classic notebook-and-tag structure that feels familiar the moment you open it, with one decisive advantage — proper end-to-end encrypted sync to your own services. It is open source, cross-platform, and as comfortable in an editor’s raw Markdown view as it is for managing hundreds of organised notes.

Where Obsidian and Logseq push linking and outliners, Joplin concentrates on organisation and portability. Notebooks, sub-notebooks and tags keep things tidy; the web clipper captures pages straight from your browser; and sync anchors everything to Nextcloud, WebDAV, OneDrive, Dropbox or your own server with end-to-end encryption so nobody but you can read the notes. Flatten a Markdown export and you can walk away with everything, licence-clean.

• Storage — Markdown notes in notebooks/tags, with local and cloud sync.
• Sync — end-to-end encrypted sync to Nextcloud, WebDAV, Dropbox, OneDrive, or the paid Joplin Cloud.
• Extras — web clipper, to-do lists, attachments, code blocks, end-to-end encryption on all sync.
• Platforms — Windows, macOS, Linux, Android, iOS.
• Licence — AGPL-3.0-or-later, fully open source.

Joplin is the best pick if you need reliable, encrypted sync across every device without touching a terminal.

Which Should You Choose?

The honest answer is that your workflow decides. If you want the richest linking and plugin ecosystem and can live with a proprietary core and personal-use-only licensing, Obsidian is superb. If your notes are blocks, tasks and connections — and you want a fully open licence with a journal-first rhythm — Logseq is the outliner for you. If you want a battle-tested notebook with encrypted sync to your own storage on every platform, Joplin is the safe, open-source pick.

All three store your data as plain files you control, so there is no lock-in: start with one and move later if your needs change. For privacy-focused users, Logseq and Joplin are the open-source options; Obsidian’s convenience trades against a proprietary licence.

The Bottom Line

There is no single winner — each app excels where the others compromise. Try Logseq if you want a free, open-source, outliner-first system; choose Joplin for bulletproof encrypted sync; pick Obsidian for maximum power if you accept its proprietary licence.

Looking for more connected and personal-knowledge tools? Browse our Note Taking & Productivity listings, or see the whole free and open-source software directory.