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MarkEdit vs CotEditor: catalog facts
MarkEdit	CotEditor
Free Free and open source under the MIT licence.	Free Free and open source.
macOS	macOS
About 4 MB installed and fast on very large files Strict GFM support with no invented syntax	Native macOS interface and fast launch Syntax highlighting for over 60 languages
macOS only Focused on Markdown rather than general note organisation	macOS only A text editor rather than a full IDE
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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