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

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