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Elvish vs yash: catalog facts
Elvish	yash
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux, Command line	macOS, Linux, Command line
Readable scripts with lists, maps and functions Catches errors like undefined variables before running	Close adherence to the POSIX shell standard Interactive line editing
Not POSIX compatible, so Bash scripts do not run unchanged Smaller ecosystem than Bash, Zsh or Fish	Smaller ecosystem of plugins and configurations than bash or zsh Not a terminal emulator; it runs inside one
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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