Head-to-head
Obsidian vs Notion
A transparent, evidence-tracked comparison. Differing rows are highlighted, and we call out ties instead of manufacturing a winner.
Winner by use case
Feature matrix
| Capability | Obsidian | Notion |
|---|---|---|
| Free tier | ✓ Yes | ✓ Yes |
| Mobile apps | ✓ Yes | ✓ Yes |
| Open source | ✕ No | ? Unknown |
| Public API | ? Unknown | ✓ Yes |
| Real-time collaboration | ? Unknown | ✓ Yes |
| Self-hostable | ≈ Partial | ✕ No |
| Usable without an account | ✓ Yes | ? Unknown |
| Works offline | ✓ Yes | ≈ Partial |
| Popularity rank | #5,245 | #2,149 |
“Unknown” means we have not yet verified that capability — not that it’s absent.
How to read this
Winners are derived from observed signals (free tier, open-source, self-hosting, offline support, collaboration, API, categorization) — a transparent heuristic, not a hidden model. Full quality scores appear once each product completes the evidence-based review pipeline. See methodology →