Compare software

zk vs Foam: catalog facts
zk	Foam
Free Free to download and use from GitHub.	Free Free and open source with no subscription.
Command line	Windows, macOS, Linux
Notes stay as plain Markdown files Works with any text editor	Notes stored as standard Markdown files Wikilinks, backlinks, embeds and graph view
Command-line only, no graphical interface Assumes comfort with the terminal	Requires Visual Studio Code No dedicated mobile app
Downloadable app	Downloadable app
Closed source	Open 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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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