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tcsh vs Oils: catalog facts
tcsh	Oils
Best for: Users and admins who work with csh-style shells and scripts	Best for: Shell script authors who want a stricter bash or a more modern shell language
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	macOS, Linux, Command line
Compatible with the C shell Command-line editing and completion All 3 strengths for tcsh Compatible with the C shell Command-line editing and completion Long-established on Unix systems	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
csh-style syntax differs from bash and other POSIX shells Smaller plugin and configuration ecosystem than zsh	Still before a 1.0 release YSH is a new language to learn
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License not stated
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for tcsh github.com/tcsh-org/tcsh Catalog checked October 2, 2026	Official website Full listing and sources Sources for Oils oils.pub Catalog checked September 24, 2026

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