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Relatrix vs Obsidian: catalog facts
Relatrix	Obsidian
Free Free and open source.	Free Free for everyone, including commercial use, in the vendor’s own words. Obsidian Sync and…
Android	Windows, macOS, Linux, Android, iOS, Browser extension
Data stays offline and encrypted on the device Links and tags between notes across the library	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
Android only Young project with a small user base	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
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	No account needed
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.