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Oils vs brush: catalog facts
Oils	brush
Best for: Shell script authors who want a stricter bash or a more modern shell language	Best for: Bash users curious about a Rust implementation of a familiar shell
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	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	Bash-compatible syntax, so existing knowledge carries over Written in Rust
Still before a 1.0 release YSH is a new language to learn	Compatibility with Bash may not be complete Younger and less widely used than Bash
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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 brush github.com/reubeno/brush Catalog checked October 2, 2026

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