Most note apps want to live on someone else's server. Obsidian made the opposite bet: your notes are plain Markdown files in a folder on your own device, and the app is just a very good lens for reading and connecting them. That one design decision is why people who switch to Obsidian rarely switch back — and why it can feel intimidating on day one.
I've run my entire "second brain" — work notes, research, article drafts, daily journals — in Obsidian for the past year, across a Windows desktop and an Android phone. This is the honest version: what's genuinely great, what still annoys me, and whether it's the right tool for you.
What is Obsidian?
Obsidian is a local-first knowledge base that works on top of a folder of plain-text Markdown files (your "vault"). It links notes together with [[wikilinks]], shows you those connections as backlinks and an interactive graph, and is endlessly extensible through a large community-plugin ecosystem. It's free for personal use, with optional paid add-ons for syncing and publishing.
Hands-on: a year of living in a vault
The thing that hooked me wasn't the graph view everyone screenshots — it was the realization that I'd never be locked in. My notes are 4,000-odd .md files I can open in any text editor, back up however I like, and read in twenty years even if Obsidian disappears tomorrow. After getting burned by a discontinued note app, that peace of mind is worth a lot.
In daily use, the wikilink-and-backlink loop is what changes how you work. You write a note, link it to related ideas with [[ ]], and over weeks a web of connections forms that surfaces things you'd forgotten you wrote. The local search is instant even across thousands of files, and Canvas — a freeform whiteboard that mixes notes, images and links — has quietly become where I outline every long piece.
The desktop app is fast and rock-solid. The mobile app is good and has improved a lot, but it's still the junior sibling: fine for capturing and reading on the go, occasionally fiddly for heavy editing. If you expect the phone to fully replace the desktop, temper that expectation.
What stands out
- You own your data. Plain Markdown files in a local folder — no proprietary database, no lock-in, full offline access.
- Linking & backlinks.
[[wikilinks]]plus automatic backlinks turn a pile of notes into a connected knowledge base. - The plugin ecosystem. Hundreds of community plugins (Dataview, Templater, Excalidraw, Tasks, Kanban) let you reshape Obsidian into almost anything.
- Canvas. An infinite whiteboard for mind-mapping and outlining that's bundled free.
- Performance. Opens and searches huge vaults faster than most cloud-based competitors.
Pricing — what's actually free, and what isn't
The app itself is free for personal use, and that includes the plugins, themes, Canvas and the full linking engine — i.e. the parts that make Obsidian special. You only pay for two optional services:
- Obsidian Sync — official end-to-end-encrypted sync across your devices, around $4/month if billed annually . You can also sync for free yourself via iCloud, a Git repo, or a file-sync service, at the cost of some fiddling.
- Obsidian Publish — turn a vault into a public website, around $8/month .
- Commercial license — required if you use Obsidian for work at a company above a certain size.
For the vast majority of individual users, the honest answer is: you can run Obsidian indefinitely for $0.
Obsidian vs Notion vs Logseq
Notion is the obvious comparison, and the choice is really about philosophy. Notion is cloud-first, collaborative, and database-driven — superb for teams and structured workspaces, but your content lives on Notion's servers and editing offline is limited. Obsidian is local-first, single-player by default, and built around free-form linked notes you own outright. If you collaborate with a team all day, Notion. If you're building a personal knowledge base you want to keep forever, Obsidian.
Logseq is the closest spiritual sibling — also local-first and Markdown-based — but it's an outliner (everything is bullet points) and fully open source. If outlining is how your brain works, try it; if you prefer document-style notes, Obsidian feels more natural.
Who should use it — and who shouldn't
Use it if you take a lot of notes, value owning your data, like to tinker, and want a tool that grows with you for years.
Skip it if you need real-time team collaboration, you want something that works perfectly with zero setup, or the idea of choosing plugins and a sync method sounds like a chore rather than fun.
Our verdict
Obsidian is the best tool there is for building a personal knowledge base you actually own. The data-ownership model, the linking engine, and the plugin ecosystem are in a class of their own, and the core is genuinely free. It loses a point for a real learning curve and a mobile app that still trails the desktop — but if you're the kind of person who wants notes that outlive any single app, nothing else comes close.
Frequently asked questions
Is Obsidian free?
Yes — it's free for personal use, including plugins, themes and Canvas. You only pay for optional Sync or Publish services, or a commercial-use license.
Where are my notes stored?
As plain Markdown files in a local folder on your device. There's no proprietary format and no required cloud account.
Can I sync Obsidian across devices for free?
Yes, using iCloud, a file-sync service, or a Git repository. Official Obsidian Sync is paid but is the simplest, end-to-end-encrypted option.
Is Obsidian good for teams?
Not really — it's built for individuals. For real-time collaboration, Notion or a Google Workspace tool is a better fit.