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The Archive vs zk: catalog facts
The Archive	zk
Paid Paid app with a 60-day free trial.	Free Free to download and use from GitHub.
macOS	Command line
Notes stored as plain Markdown text files Sync through any cloud storage folder	Notes stay as plain Markdown files Works with any text editor
macOS only Site lists compatibility up to macOS 14 Sonoma	Command-line only, no graphical interface Assumes comfort with the terminal
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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