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Obsidian vs Cosense: catalog facts
Obsidian	Cosense
Free Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…	Freemium Can be tried directly; organisations contact the developer about rollout and pricing.
Windows, macOS, Linux, Android, iOS, Browser extension	Web
Notes are plain Markdown files in a folder you control, readable without the app Linking, backlinks, tags, graph view and fast search across the vault	Quick page creation with bracket links between pages Notes form a linked network rather than a folder tree
The application is not open source, only the plugin ecosystem and the releases repository Syncing between devices means paying for Obsidian Sync or wiring up your own sync tool	Hosted service only; notes live on the developer's servers Pricing details for organisations require contacting the developer
Downloadable app, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.