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Oils vs Elvish: catalog facts
Oils	Elvish
Best for: Shell script authors who want a stricter bash or a more modern shell language	Best for: People who want a shell with a real programming language for scripts
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	Windows, macOS, Linux, Command line
OSH runs existing bash scripts with stricter error checking YSH adds structured data and JSON support All 4 strengths for Oils OSH runs existing bash scripts with stricter error checking YSH adds structured data and JSON support Both shells in one small binary Detailed reference documentation	Readable scripts with lists, maps and functions Catches errors like undefined variables before running All 4 strengths for Elvish Readable scripts with lists, maps and functions Catches errors like undefined variables before running Failed commands abort execution by default Single static binary for Linux, BSDs, macOS and Windows
Still before a 1.0 release YSH is a new language to learn	Not POSIX compatible, so Bash scripts do not run unchanged Smaller ecosystem than Bash, Zsh or Fish
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: BSD-2-Clause
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for Oils oils.pub Catalog checked September 24, 2026	Official website Full listing and sources Sources for Elvish elv.sh Catalog checked September 24, 2026

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