Notion is a shared workspace in the browser: notes, databases, and wikis for a team. Obsidian is a folder of Markdown files on your computer, with optional paid sync. They are both called notes apps and they are not substitutes.
| Feature | Notion | Obsidian |
|---|---|---|
| Best for | A team wiki and light databases | A personal notebook you own |
| Files | Stored in Notion | Markdown on your disk |
| Offline | Limited | Yes |
| Collaboration | Built in | Not the point of the app |
| Price | Free for personal; paid for teams | Free app; sync is a paid add-on |
| Where to check price | notion.so/pricing | obsidian.md |