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zk vs Markdown Oxide: catalog facts
zk	Markdown Oxide
Free Free to download and use from GitHub.	Free Free and open source under the GPL-3.0 licence.
Command line	Windows, Command line
Notes stay as plain Markdown files Works with any text editor	Works inside the editor you already use Notes stay as plain Markdown files
Command-line only, no graphical interface Assumes comfort with the terminal	Requires an editor with LSP support and some setup No standalone interface of its own
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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