Keep the linked-notes, backlinks, and knowledge-graph workflow you love about Obsidian — but with real-time collaboration, sharing, AI, and every content type built in, no plugins to maintain.
Obsidian is fantastic for solo, local-first personal knowledge management, and its plugin ecosystem is huge. The trade-off is that collaboration, sharing, and many features depend on plugins or paid add-ons, and it is built around a single user. Arythmatic Notes keeps the connected-knowledge workflow — backlinks, nested pages, full-text search — and makes it collaborative out of the box, with whiteboards, databases, tasks, flashcards, and AI included.
Obsidian is a capable product — this page is for teams whose needs have outgrown it.Obsidian is a trademark of its respective owner.
| Feature | Arythmatic Notes | Obsidian |
|---|---|---|
| Spaces & nested pages | ||
| Rich-text docs | ||
| Spreadsheets with formulas | ||
| Slides / presentations | ||
| Native whiteboards (infinite canvas) | ||
| Interactive flowcharts | Plugin | |
| Databases / collections | ||
| Jira-grade task board | Plugin | |
| Spaced-repetition flashcards | Plugin | |
| AI that cites your pages | Plugin | |
| Real-time collaboration | Add-on | |
| Version history | ||
| Free plan | ||
| Paid plans start at | $4.99/mo | Free / paid sync |
Reflects generally available features at time of writing. Always check each vendor's site for the latest.
Move your most important notes into Spaces and Pages, keep linking ideas with backlinks, and invite collaborators when you are ready. Start free.
Yes — pages link to each other and surface backlinks, so you can build a connected knowledge base, with full-text search across everything.
Start free, bring your team, and keep everything you know in one place. No credit card required.
Free forever for individuals · No credit card required