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HackMD vs StackEdit: catalog facts
HackMD	StackEdit
Freemium Free to start, with paid plans for teams.	Free Free to use in the browser.
Web	Web
Real-time collaborative Markdown editing Works in any browser with no install	Live preview with synchronised scrolling Sync with Google Drive, Dropbox and GitHub
Notes live on a hosted service rather than local files Increasing focus on AI agent features may not suit everyone	Browser only, no desktop app Cloud sync depends on third-party accounts
Web application	Web application
Closed source	Open source
License not stated	License not stated
Account needed	No account needed
Not stated if it works offline	Not stated if it 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.