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LuaJIT vs Janet: catalog facts
LuaJIT	Janet
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
High performance with a small memory footprint Drop-in replacement for the Lua 5.1 library	Entire language under 1MB in one binary Threads, networking and an event loop built in
Targets Lua 5.1 rather than newer Lua versions Usually built from source rather than installed from binaries	Smaller package ecosystem than mainstream scripting languages Lisp-style syntax takes adjustment for newcomers
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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