Can I open-source Duolingo Super?
YES · mature open-source replacementYes. Anki (30k stars), AnkiDroid (11k stars), Moodle (7k stars) are mature open-source replacements for Duolingo Super — self-host in one command and stop paying $12.99/mo.
People still pay for Duolingo Super because the learning loop is buildable, while trusted curriculum, instructors, feedback, credentials, and community are not. The recurring cost buys curriculum quality, assessment validity, content rights, spaced-repetition tuning, speech models, sync, moderation, and support, not just the visible interface.
xmassive curriculum, adaptive models, content, social loops, mobile polish, and brand
xlicensed course catalog
xexpert curriculum
xhuman feedback
xlarge learner network and certification
These projects already replace it, free.
AAnkiBuild a small language deck with audio, images, typed answers and excellent spaced repetition; no cartoon guilt trips.open source↗AAnkiDroidA full Android Anki client for authored language decks, pronunciation recordings and offline review.open source↗MMoodleCan run your own sequenced lessons, quizzes and progress tracking, though nobody will mistake it for a game.open source↗What each one is, in full: Anki
all 5 open-source alternatives to Duolingo Super →· no votes, no pay-to-list · just what's real
Can I open-source Duolingo Super?
Yes. Anki replaces Duolingo Super today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Duolingo Super cost?
Duolingo Super costs about $12.99/month (Super, checked 2026-07-31), which is $155.88 per year. That's what you save by replacing it with open source.
What do I lose by replacing Duolingo Super?
Honestly: massive curriculum, adaptive models, content, social loops, mobile polish, and brand; licensed course catalog; expert curriculum; human feedback; large learner network and certification. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Duolingo Super?
Yes: Anki (Build a small language deck with audio, images, typed answers and excellent spaced repetition; no cartoon guilt trips.) AnkiDroid (A full Android Anki client for authored language decks, pronunciation recordings and offline review.) Moodle (Can run your own sequenced lessons, quizzes and progress tracking, though nobody will mistake it for a game.) All 5 curated open-source alternatives are at caniopensourceit.online/duolingo-super/alternatives.