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rbenv vs asdf: catalog facts
rbenv	asdf
Free Free and open source.	Free Free and open source under the MIT licence.
macOS, Linux, Command line	macOS, Linux, Command line
Per-project Ruby versions selected automatically Small and simple compared with heavier version managers	One tool and one .tool-versions file replaces nvm, rbenv, pyenv and friends Plugin ecosystem covers hundreds of runtimes and CLI tools
Unix-like systems only, no native Windows support Installing new Ruby versions needs a separate plugin such as ruby-build	Shim indirection adds startup latency and occasionally confuses tooling Plugin quality varies since each is community-maintained
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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