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Python vs Julia: catalog facts
Python	Julia
Free Free and open source under the Python Software Foundation Licence, a permissive licence.	Free Free and open source under the MIT license.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Readable syntax that makes it the usual first language and easy to return to The standard library covers a lot without any third-party packages	Compiles to native code via LLVM for high performance Interactive REPL with a scripting-language feel
Much slower than compiled languages for CPU-heavy work The global interpreter lock limits threading, though recent versions are addressing it	Compilation can make the first run of code slow Smaller package ecosystem than Python or R
Downloadable app	Downloadable app
Open source	Open source
License: Python-2.0	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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