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bita vs HDiffPatch: catalog facts
bita	HDiffPatch
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, Command line	Windows, macOS, Linux, Command line
Works with any regular HTTP or HTTPS server Reuses existing local data to cut bandwidth	Diffs whole directories, not just single files Handles large files with limited memory
Command-line only Aimed at update distribution rather than everyday folder sync	Command-line only, no graphical interface Documentation leans towards developers
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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