Build or Bill

Learning and careers

Duolingo Super alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

mengxi-ream/read-frog8,976GPL-3.0Language learning and translation app offering reading-focused lessons and practice.Open on GitHub lingdojo/kana-dojo3,131AGPL-3.0Aesthetic minimalist web app for learning Japanese with practice exercises and drills.Open on GitHub

What you give up either way

  • Proprietary course authoring and curation at Duolingo scale
  • Large catalogue of polished content and human-tested exercises
  • Established mobile apps and ecosystem integrations
  • Brand recognition and marketing reach

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Duolingo Super, and it does not prove anyone has run it for a month. How we decide.