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unar vs bsdtar (libarchive): catalog facts
unar	bsdtar (libarchive)
Free Free and open source under the LGPL.	Free Free and open source with no paid tier.
Windows, macOS, Linux, Command line	Windows, Linux, Command line
Same format support as The Unarchiver, in a terminal Runs on macOS, Windows and Linux	One tool reads many formats, including zip, rar and ISO Automatic format and compression detection
Windows build is slightly outdated No graphical app outside macOS	Writes fewer formats than it reads; rar is read-only Command-line only
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1-or-later	License: BSD-2-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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