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FreeFileSync vs Bvckup 2: catalog facts
FreeFileSync	Bvckup 2
Free Free to download and use; the project runs on advertising and donations. A paid Donation…	Paid Paid software with a two-week free trial.
Windows, macOS, Linux	Windows
Transfers only the differences between source and target instead of copying everything Saved jobs run unattended in batch mode, suitable for scheduled backups	Delta copying and multi-threaded processing for speed Backups can trigger when a specific USB drive is connected
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	Windows only One-way replication rather than versioned backup archives
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

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