Duolingo solved a problem nobody else in education has: getting ordinary people to come back tomorrow. The streak, the owl, the leagues and the notifications are frequently mocked, and they work. Whatever else is true about the company, that mechanism is the reason hundreds of millions of people have studied a language at all.
The interesting questions in 2026 are what the AI layer has added, and what the company's very public bet on AI has cost it.
- The best-designed habit loop in consumer education, and it works
- Free tier is genuinely usable, not a demo
- Max adds AI Video Call with Lily and Roleplay — real speaking practice, on demand
- Explain My Answer turns a wrong answer into a short lesson
- Expanded well beyond languages into Math, Music and Chess
- Gamification rewards streaks over competence — high XP does not mean you can hold a conversation
- Speaking and free production are still under-trained relative to recognition and translation
- The 2025 AI-first memo and contractor cuts prompted a public backlash and subscription cancellations
- 148 courses were built with generative AI in one release; quality assurance at that scale is unproven
- No public price list — Super and Max are sold in-app at rates that vary by region and promotion
- Beginners who need to build a daily study habit before anything else
- Travellers wanting functional basics in a widely taught language
- Learners who want low-stakes speaking practice via Max's roleplay and video call
- You are past intermediate and need real conversation, correction and nuance
- You want a curriculum designed for a specific exam or professional context
- The AI-first restructuring is a dealbreaker for you — several longtime users decided it was
Pricing
The full course path with ads and limited energy. Genuinely usable rather than a trial.
No ads, unlimited energy, personalised review through Practice Hub. Duolingo prices subscriptions in-app and rates differ by country, platform and promotion — check the in-app price before subscribing.
Everything in Super plus the generative-AI features: Video Call with Lily, Roleplay conversations with in-app characters, and Explain My Answer.
Shared subscription across multiple accounts, the usual route to a lower per-person price.
What the free tier still gives you
More than most freemium products. The full course path is available, gated only by advertising and by energy that refills over time. A patient beginner can work through a language for months without paying, which is why the funnel works — Duolingo converts people who have already built the habit, not people evaluating a free trial.
The teaching itself is strongest at the beginning: vocabulary, recognition, simple sentence construction, and the spaced repetition that keeps them from evaporating. It is weakest at the far end, where you need to produce unrehearsed speech and understand people talking at normal speed. That shape has not changed in a decade.
What Max actually adds
Duolingo Max, launched in 2023 on OpenAI's GPT-4 and expanded since, is the first serious attempt to fix the speaking gap. Video Call puts you in a live spoken conversation with the character Lily, who opens on a topic related to what you have been studying, responds in real time, remembers what you discussed last time, and leaves you a transcript to review. Roleplay is the same idea in scripted scenarios attached to the lesson path. Explain My Answer takes a mistake and explains the rule you missed instead of just marking it wrong.
These are the right features. A patient conversation partner who never judges you is exactly what intermediate learners lack and cannot easily buy. They are also a strong argument for the subscription in a way that unlimited energy never was.
The 148-course expansion
In 2025 Duolingo announced 148 new courses built with generative AI, more than doubling its catalogue in one release. The access argument is genuinely strong: many of those language pairs had no decent app at all, and building each one by hand had historically taken years.
The caveat is the obvious one. Duolingo's reputation was built on courses that human curriculum designers laboured over, and nobody outside the company has independently assessed whether the generated courses hold that standard. This is the single most important thing to watch about the product over the next few years, and it is separate from any argument about jobs.
The AI-first memo, and the climbdown
On 28 April 2025 Luis von Ahn published a memo declaring Duolingo AI-first: contractors would be phased out where AI could do the work, headcount requests would have to prove the work could not be automated, and AI use would factor into performance reviews.
The reaction was brutal and came mostly from users rather than the press — comment sections filled with people saying they were cancelling subscriptions and deleting the app, and the memo became a widely cited example of how not to announce an AI strategy. Von Ahn subsequently told the New York Times that the backlash was "on me" and that he "did not give enough context", emphasised that Duolingo has never laid off full-time employees and does not intend to, and by April 2026 had abandoned the performance-review requirement outright, telling the Financial Times he had not expected the blowback.
Two honest readings coexist. One is that a company being candid about automation was punished for candour that its rivals avoid by staying quiet. The other is that a consumer brand built on a friendly green owl and volunteer-adjacent goodwill discovered its users had opinions about who was making the courses. Both were true, and the record now includes both the memo and the retreat from it.
Where it stops working
Around the intermediate plateau. Duolingo will get you to the point of recognising a great deal and producing a little, then leave you there unless you add something — conversation practice, media in the target language, a tutor. Max softens that edge without removing it. Anyone treating a long streak as evidence of competence is measuring attendance, not ability.
What the evidence actually says
Duolingo publishes its own efficacy research and operates the Duolingo English Test, which is accepted by a large number of universities as a proficiency measure — that acceptance is the strongest external validation the company has, because institutions had to be persuaded to take it seriously.
Company-run studies are still company-run studies. The broader academic picture on app-based language learning is more mixed than any vendor's marketing, and it consistently points at the same conclusion: apps are effective for vocabulary acquisition and early grammar, and much weaker for the productive skills that define fluency. Nothing about Duolingo contradicts that. It is very good at the part it is good at.
The practical implication is about expectations rather than product quality. Two years of a daily streak is a genuine achievement and it is not the same as being able to hold a conversation with a stranger in a shop, and the gap between those two things is where most Duolingo users quietly get stuck.
The verdict
Start free. Almost everyone should — it costs nothing and the habit is the hard part. Upgrade to Max, not Super, if you upgrade at all, because the AI conversation features are the only tier difference that changes what you can learn rather than how comfortable the app is. And check the price inside your own app, because Duolingo does not publish one and the number you were quoted by a review site is not necessarily the number you will pay.
