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Exercism vs Rustlings: catalog facts
Exercism	Rustlings
Free Free to use.	Free Free and open source.
Web	Windows, macOS, Linux, Command line
Exercises in dozens of programming languages Optional feedback from mentors	Learn by fixing real compiler errors Runner gives immediate feedback as you edit
Mentor availability can vary by language Focused on practice exercises rather than full courses	Requires a Rust toolchain installed first Exercises are short and do not build larger projects
Web application	Downloadable app
Closed source	Open source
License not stated	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 23, 2026	Official website Full listing and sources Checked October 2, 2026

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