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GHCup vs asdf: catalog facts
GHCup	asdf
Free Free and open source.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	macOS, Linux, Command line
One tool for GHC, Cabal, Stack and HLS Switch between toolchain versions	One tool and one .tool-versions file replaces nvm, rbenv, pyenv and friends Plugin ecosystem covers hundreds of runtimes and CLI tools
Default install relies on piping a script into a shell Only useful for Haskell development	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: LGPL-3.0	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

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