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Exercism vs Sololearn: catalog facts
Exercism	Sololearn
Free Free to use.	Freemium Courses are free; a paid subscription unlocks extra features.
Web	Android, iOS, Web
Exercises in dozens of programming languages Optional feedback from mentors	Short lessons that fit on a phone Wide range of languages from Python to SQL
Mentor availability can vary by language Focused on practice exercises rather than full courses	Requires signing in Introductory depth; not a replacement for building real projects
Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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