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SubEthaEdit vs CotEditor: catalog facts
SubEthaEdit	CotEditor
Free Free and open source.	Free Free and open source.
macOS	macOS
Real-time collaborative editing Block editing on multiple lines	Native macOS interface and fast launch Syntax highlighting for over 60 languages
macOS only Smaller extension ecosystem than mainstream editors	macOS only A text editor rather than a full IDE
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is 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 September 23, 2026

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