Babbel
Multi-languageStructured dialogue-based courses in 13 languages, built by actual linguists.
About this tool →Details
Subscription-only after a handful of free intro lessons, typically $10–15/month with big discounts on annual plans. Lessons are short, dialogue-first and explain grammar properly, which makes it a much more serious beginner course than Duolingo. It covers only 13 languages and effectively stops around B1, so it is a stepping stone rather than a destination.