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Tangent vs Foam: catalog facts
Tangent	Foam
Free Free and open source under the Apache 2.0 licence.	Free Free and open source with no subscription.
Windows, macOS, Linux	Windows, macOS, Linux
Notes are plain Markdown files on your own disk Sliding panels and a branching map for following linked notes	Notes stored as standard Markdown files Wikilinks, backlinks, embeds and graph view
No built-in sync or mobile app mentioned Smaller community than Obsidian or Logseq	Requires Visual Studio Code No dedicated mobile app
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	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 October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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