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Obsidian vs Notenik: catalog facts
Obsidian	Notenik
Free Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…	Free Free with no in-app purchases, subscriptions or ads; source code under the MIT license.
Windows, macOS, Linux, Android, iOS, Browser extension	macOS
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	Notes stored as plain text files you can open anywhere Wiki-style links between notes
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	Mac only Sync depends on a third-party service you set up yourself
Downloadable app, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 24, 2026

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