Research · head to head
Obsidian vs Mendeley
Obsidian
Research
A powerful knowledge base on top of a local folder of plain text Markdown files
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Obsidian sync is a paid add-on at $4 per month billed annually rather than part of the app; Mendeley free plan is capped at 2GB storage; unlimited storage requires the MAX plan at $14.99/month or $165/year
Where they differ
Only the attributes on which Obsidian and Mendeley actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Research).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Obsidian
- Bidirectional linking
- Graph view visualization
- Markdown support
- Local file storage
- Plugin ecosystem
- Custom CSS themes
- Templates
- Search and tags
Only in Mendeley
Nothing recorded that Obsidian does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
Obsidian
- Local-first markdown note taking with no account requirednot Mendeley
- Linking notes into a personal knowledge graphnot Mendeley
- Syncing a vault across devices with end-to-end encryption on the paid add-onnot Mendeley
- Publishing a public site from a vaultnot Mendeley
- Extending the editor with community pluginsnot Mendeley
Mendeley
No use cases recorded yet. See the Mendeley review.
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Obsidian
- Sync is a paid add-on at $4 per month billed annually rather than part of the app
- Publishing to the web is a further $8 per month per site
- Commercial use asks for a $50 per user per year licence, though the vendor states it is not required
- Collaboration is limited compared with a hosted notes tool, since the vault is local files first
Mendeley
- Free plan is capped at 2GB storage; unlimited storage requires the MAX plan at $14.99/month or $165/year
Pricing, plan by plan
Obsidian
Free- Obsidian Sync$4/month
- Sync notes across devices
- Obsidian Publish$8/month
- Turn notes into a website
Mendeley
FreeNo published plan breakdown. See the Mendeley review.
Which should you pick?
Choose Obsidian if
- You need bidirectional linking.
- You want to start without paying.
- You work on Web, Windows, macOS, Linux, iOS, Android.
- You also want graph view visualization.
Questions people ask
- Is Obsidian or Mendeley better?
- Neither clearly leads. Obsidian starts at Free and Mendeley at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Obsidian or Mendeley?
- Obsidian starts at Free and Mendeley at Free.
- Does Obsidian or Mendeley run on more platforms?
- Obsidian runs on Web, Windows, macOS, Linux, iOS, Android. Mendeley runs on Web.
- Can I use Obsidian for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Obsidian best used for?
- Obsidian is most often used for local-first markdown note taking with no account required, linking notes into a personal knowledge graph, syncing a vault across devices with end-to-end encryption on the paid add-on, publishing a public site from a vault. Of those, local-first markdown note taking with no account required and linking notes into a personal knowledge graph are not what Mendeley is typically brought in for.
- What can Obsidian do that Mendeley cannot?
- Obsidian covers Bidirectional linking, Graph view visualization, Markdown support, Local file storage.
Answered from the vendors’ own pages
Obsidian: Is Obsidian free?
Yes. The core Obsidian application is 100% free for personal and commercial use with no limitations. You can use unlimited vaults and every core feature without payment.
SourceObsidian: What file format does Obsidian use?
Obsidian stores every note as a plain Markdown file. Because it uses standard Markdown instead of a proprietary format, your notes remain portable and can be edited with many other Markdown editors.
SourceObsidian: Can I collaborate with others in Obsidian?
The core application does not include built-in team collaboration features. However, Obsidian offers optional add-ons and can be used with version control systems or cloud storage for collaboration.
Source