Obsidian

Obsidian is a local-first, plain-text knowledge base for macOS that lets you build a personal wiki from interlinked Markdown files you own outright — no account, no sync lock-in, no proprietary format.

What is Obsidian?

Obsidian is a note-taking and knowledge-management application from Dynalist Inc. that stores every note as a standard .md file on your own hard drive. Unlike Notion or Evernote, which warehouse your writing in their cloud, Obsidian's vault is just a folder. Open it in any text editor, back it up with Time Machine, or version-control it with Git — the data is yours whether or not Obsidian ever opens again.

The headline feature is the graph view: every [[wikilink]] you create between notes becomes an edge in a visual web you can explore, zoom, and filter. After a few months of serious use my graph started surfacing connections between ideas I had genuinely forgotten I'd written — that serendipity is the thing no outline app can replicate.

What does Obsidian do best?

Obsidian excels at long-term, non-linear thinking — the kind of work where you need to rediscover old notes rather than just retrieve them. Its bidirectional links, backlinks panel, and graph view combine into a genuine second brain rather than a prettier filing cabinet.

Beyond links, the plugin ecosystem is genuinely extraordinary. Community plugins add spaced-repetition flashcards, canvas-style whiteboards, daily-note automations, Dataview (SQL-like queries over your vault), Templater, Kanban boards, and calendar integration. I run about 15 plugins and the app stays snappy; that is not something I can say about every extensible tool in this space.

The editor itself is excellent for writers. It handles raw Markdown, offers a polished live-preview reading mode, and supports callouts, tables, code blocks with syntax highlighting, footnotes, and embedded transclusion of other notes. Anything you paste into Obsidian stays readable in any Markdown-aware tool forever.

• Bidirectional links — [[note name]] forward links generate automatic backlinks in the target note
• Graph view — interactive force-directed map of your entire vault
• Dataview — query your vault metadata like a lightweight database (via community plugin)
• Canvas — built-in infinite spatial canvas for visual brainstorming (ships with core Obsidian)
• Templater + daily notes — robust journaling and meeting-notes workflows
• Native Apple Silicon — fast on both M-series and Intel Macs

Is Obsidian free?

Obsidian is free to download and use indefinitely for personal use. The company monetises through two optional paid tiers: Obsidian Sync (end-to-end-encrypted vault syncing across devices) and Obsidian Publish (hosted public site from your vault). Both are conveniences, not requirements — I sync my vault via iCloud Drive without paying a cent, and I publish notes with a self-hosted Quartz site.

Commercial use requires a one-time Catalyst license, reasonably priced. There is no freemium content wall, no AI upsell overlay, and no features locked behind a subscription in the core editor.

Who should use Obsidian?

Obsidian rewards people who write to think: researchers, academics, writers working on long-form projects, software engineers building a personal knowledge base, and anyone running a Zettelkasten or PKM system. If you want to press a button and get a task list today, reach for Things 3 or OmniFocus instead. If you want to grow a vault that gets smarter the longer you use it, Obsidian is unmatched.

It has a steeper on-ramp than Notion or Apple Notes. The plain-file model means you own the migration path, but you also own the setup. New users should resist plugin overload in the first week — the core app alone is powerful, and the community rabbit hole is deep.

What are the best Obsidian alternatives?

For local-first Markdown with links, Logseq is the closest rival — it uses an outliner paradigm that suits some people better than Obsidian's page-centric model. Roam Research popularised bidirectional links but is web-only and subscription-priced. Notion offers richer databases but stores everything in its cloud. Bear is the most polished native Mac writing experience but lacks wikilinks and graph features. Apple Notes wins on friction-free capture but offers nothing for long-term synthesis. For pure distraction-free writing, iA Writer or Ulysses are better choices than Obsidian.

How does Obsidian compare to Notion?

The sharpest difference is data ownership: Obsidian stores plain text files locally; Notion stores your content in Notion's proprietary database. Notion's relational databases, collaboration features, and shareable pages are genuinely superior for team wikis. Obsidian's local-first architecture, offline performance, speed on large vaults, and unlimited file storage (it's your disk) are superior for personal knowledge work. I use both — Notion for shared project docs, Obsidian for everything I want to keep and compound over years.