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zk vs NotesMD CLI: catalog facts
zk	NotesMD CLI
Free Free to download and use from GitHub.	Free Free and open source under the MIT license.
Command line	Command line
Notes stay as plain Markdown files Works with any text editor	Interact with Obsidian vaults from the terminal Can run without Obsidian open
Command-line only, no graphical interface Assumes comfort with the terminal	Designed for Obsidian vaults
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
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 October 8, 2026

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