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FreeFileSync vs DirEqual: catalog facts
FreeFileSync	DirEqual
Free Free to download and use; the project runs on advertising and donations. A paid Donation…	Paid Paid app; see the developer's pricing page for current rates.
Windows, macOS, Linux	Windows, macOS
Transfers only the differences between source and target instead of copying everything Saved jobs run unattended in batch mode, suitable for scheduled backups	Side-by-side tree view of both folders Detects size, date and content differences
The installer and the website carry advertising, and the download page pushes donations hard Some conveniences, including parallel file copying, are reserved for the paid Donation Edition	Paid software Compares folders rather than showing line-by-line text diffs
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

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