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Zettlr vs Octarine: catalog facts
Zettlr	Octarine
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Free to download, with paid features offered; see the site for details.
Windows, macOS, Linux	macOS
Combines document navigation with flexible export workflows.	Notes kept as local Markdown files Core features built in without plugins
Some publication formats require additional export dependencies.	Download offered for macOS only Opinionated design with fewer configuration options
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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