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Znote vs massCode: catalog facts
Znote	massCode
Free Free to download and use.	Free Free and open source.
macOS	macOS
Works on plain local Markdown files Runnable JavaScript code blocks inside notes	Snippets, notes, HTTP requests and diagrams in one app Local-first storage that works offline
Maintained by one developer AI features depend on configuring a model provider	Broad feature set may be more than a snippet manager needs Platform support beyond macOS not confirmed here
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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