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Notable vs Obsidian: catalog facts
Notable	Obsidian
Free Free to use as freeware.	Free Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…
Windows	Windows, macOS, Linux, Android, iOS, Browser extension
Notes kept as plain GitHub Flavored Markdown Nestable tags and attachments	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
Source code of current versions is not published Development has slowed, with infrequent updates	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
Downloadable app	Downloadable app, Browser extension
Closed source	Closed source
License: Freeware	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 20, 2026

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