Busuu

Busuu's central idea is a fair exchange: you correct exercises written by people learning your language, and native speakers of your target language correct yours. That gives learners something no algorithm provides — a human telling them that what they wrote is technically correct but nobody would say it.

The company operates from London and Madrid, and its free tier is the most usable in this category.

Community Corrections

Written and spoken exercises are submitted to the community, and corrections typically come back within hours. The feedback is often more useful than a teacher's because it is idiomatic rather than grammatical — native speakers flag phrasing that is correct but unnatural, which is exactly what app-based learners get wrong.

Correcting others' work in your own language is also a surprisingly effective way to notice how your target language differs.

Certificates

Busuu offers McGraw Hill Education certificates on completion of levels, which gives the learning an external marker. For someone who needs to demonstrate a language level to an employer, that is more useful than an app streak.

Free Tier

The free version includes core lessons and community corrections, which makes Busuu the best starting point in this category for anyone unwilling to pay before knowing whether the format works for them.

Limitations to Consider

Correction quality varies — community members are native speakers, not teachers, and explanations can be thin or occasionally wrong. Busuu was acquired by Chegg, a US company, so while it operates from London and Madrid the ownership is American, which matters if strict European ownership is your criterion. Fourteen languages is a limited catalogue.

Who Should Use Busuu

Learners who want human feedback on what they produce without paying for a tutor, and anyone wanting to try a structured language course properly before committing to a subscription.