Research · head to head
Mendeley vs Obsidian
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: Mendeley free plan is capped at 2GB storage; unlimited storage requires the MAX plan at $14.99/month or $165/year; Obsidian sync is a paid add-on at $4 per month billed annually rather than part of the app
Where they differ
Only the attributes on which Mendeley and Obsidian 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 Mendeley
Nothing recorded that Obsidian does not also cover.
Only in Obsidian
- Bidirectional linking
- Graph view visualization
- Markdown support
- Local file storage
- Plugin ecosystem
- Custom CSS themes
- Templates
- Search and tags
What people use each for
The jobs each tool is most often brought in to do.
Mendeley
No use cases recorded yet. See the Mendeley review.
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
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Mendeley
- Free plan is capped at 2GB storage; unlimited storage requires the MAX plan at $14.99/month or $165/year
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
Pricing, plan by plan
Mendeley
FreeNo published plan breakdown. See the Mendeley review.
Obsidian
Free- Obsidian Sync$4/month
- Sync notes across devices
- Obsidian Publish$8/month
- Turn notes into a website
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 Mendeley or Obsidian better?
- Neither clearly leads. Mendeley starts at Free and Obsidian at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Mendeley or Obsidian?
- Mendeley starts at Free and Obsidian at Free.
- Does Mendeley or Obsidian run on more platforms?
- Mendeley runs on Web. Obsidian runs on Web, Windows, macOS, Linux, iOS, Android.
- Can I use Mendeley for free?
- Both have a free tier, so you can try either at no cost before committing.
- What can Mendeley do that Obsidian 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