Obsidian
Perplexity AI
| Feature | Obsidian | Perplexity AI |
|---|---|---|
| Pricing | Free / from $4/mo | Free / from $20/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.7 / 5 | 4.5 / 5 |
| Best For | researchers, writers, developers, knowledge-workers | researchers, students, journalists, professionals |
| Founded | 2020 | 2022 |
| Markdown | ✓ | ✗ |
| Backlinks | ✓ | ✗ |
| Graph View | ✓ | ✗ |
| Plugins | ✓ | ✗ |
| Themes | ✓ | ✗ |
| Canvas | ✓ | ✗ |
| Search | ✗ | ✓ |
| Citations | ✗ | ✓ |
| Focus Modes | ✗ | ✓ |
| File Upload | ✗ | ✓ |
| Collections | ✗ | ✓ |
| Api | ✗ | ✓ |
✓ Obsidian Pros
- 100% offline
- Local-first
- Plugin ecosystem
- Graph view
- Free for personal use
✗ Obsidian Cons
- No real-time collaboration
- Steep learning curve
- Mobile app is basic
✓ Perplexity AI Pros
- Source citations
- Real-time web access
- Focus modes
- Clean UI
✗ Perplexity AI Cons
- Limited free queries
- Can still have errors
- No document upload on free
The Verdict
Obsidian is best for researchers and writers who need 100% offline. Perplexity AI is ideal for researchers and students looking for source citations. Both tools offer free plans, so try each to see which fits your workflow.