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bsdiff vs Xdelta: catalog facts
bsdiff	Xdelta
Best for: Developers building or applying binary file updates	Best for: Creating and applying binary patches to large files
Free Free and open source under the BSD-2-Clause license.	Free Free and open source under the Apache 2.0 licence.
Command line	Windows, Command line
Creates and applies binary patches Designed for changes to executable files	Produces compact binary patches between file versions Uses the standard VCDIFF format from RFC 3284 All 4 strengths for Xdelta Produces compact binary patches between file versions Uses the standard VCDIFF format from RFC 3284 Available as both a CLI tool and a C library Actively maintained
bsdiff requires substantial memory Uses bzip2	Command-line only, with no graphical interface Building from source requires CMake
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License: Apache-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for bsdiff daemonology.net/bsdiff Catalog checked October 8, 2026	Official website Full listing and sources Sources for Xdelta github.com/jmacd/xdelta Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.