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Learn a new language with the world’s most-downloaded education app! Duolingo is the fun, free app for learning 40+ languages through quick, bite-sized lessons. Practice speaking, reading, listening, 

From the creators behind Duolingo, the world’s #1 education app, comes Duolingo ABC! Duolingo ABC is the fun, hands-on way for your child to learn to read!
 
From preschool to second grade, engage kid

Duolingo Blog

Everything you need to know about Italian pronunciation

Commitment to keeping core learning experiences free forever, ensuring anyone can learn regardless of financial means

Free Education for All

Using A/B testing, behavioral psychology, and AI to continuously improve learning effectiveness and engagement

Data-Driven Innovation

Making education fun and addictive through gamification, humor, and the beloved Duo owl mascot

Joyful Learning

Fostering a transparent workplace culture where humor is balanced with respect and kindness

Transparency & Respect

Duolingo is the world's most popular language-learning platform with 130M monthly users, offering 250+ courses in 42 languages plus math, music, and chess through gamified learning.

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Luis von Ahn

Co-Founder, CEO & Chairman

Severin Hacker

Co-Founder & CTO

Matt Skaruppa

Chief Financial Officer

Cammie Dunaway

Chief Marketing Officer

Natalie Glance

Chief Engineering Officer

Molly Lindsay

Chief People Officer

Duolingo, Inc. is an American educational technology company that produces learning apps and provides language certification. Duolingo offers courses on 42 languages, ranging from English, French, and Spanish to less commonly studied languages such as Welsh, Irish, and Navajo, and even constructed languages such as Esperanto and Klingon. It also offers courses on music, math, and chess. The learning method incorporates gamification to motivate users with points, rewards and interactive lessons featuring spaced repetition. The app promotes short, daily lessons for consistent, phased practice. Duolingo also offers the Duolingo English Test, an online language assessment, and Duolingo ABC, a literacy app designed for children. The company follows a freemium model, where some content is provided for free with advertising, and users can pay for ad-free services which provide additional features.

American online platform for language learning

Core offering of 250+ free language courses across 42 languages including popular ones like Spanish, French, and Mandarin, plus less common languages like Welsh, Navajo, and Klingon. Uses adaptive algorithms and gamification to teach vocabulary, grammar, and conversation skills.

Duolingo Free Language Courses

Ad-free premium subscription offering unlimited hearts, personalized practice, mastery quizzes, and monthly streak repairs. Costs $12.99/month or $59.99/year, with family plans at $119.99/year for up to 6 users.

Super Duolingo (Premium Subscription)

Highest-tier subscription featuring GPT-4-powered AI features including Video Call with Lily for conversation practice, Explain My Answer for personalized feedback, and Roleplay scenarios. Costs $29.99/month or $168/year, accounting for 5% of paid subscribers.

Duolingo Max (AI-Powered Premium)

Online English proficiency certification exam accepted by thousands of universities worldwide as an alternative to TOEFL. Costs $59 and can be taken from home in under an hour with results in 48 hours.

Duolingo English Test

Free literacy app designed for children ages 3-8 to learn reading fundamentals, letter sounds, phonics, and early reading concepts through engaging activities.

Duolingo ABC

Free math learning courses covering elementary math concepts and brain training exercises, expanding Duolingo beyond languages into STEM education.

Duolingo Math

Music theory and appreciation courses teaching fundamental concepts through interactive lessons, part of Duolingo's multi-subject expansion.

Duolingo Music

Puzzle-based chess learning experience that became Duolingo's fastest-growing subject, reaching 1 million daily users. Features player-versus-player mode and available in six languages.

Duolingo Chess

Free podcast-style audio lessons dynamically generated around user's current lessons, providing immersive listening practice in target languages.

DuoRadio

Immersive exploration game-like experience where learners interact with Duolingo characters like Lily and Oscar while applying language skills to realistic scenarios like ordering coffee or getting passports checked.

Adventures

Duolingo reported Q3 2025 revenue of $400.2 million (up 9% YoY), raised full-year guidance to $1.68-1.69 billion, and announced 47.7 million daily active users (40% YoY growth) alongside 10.9 million paid subscribers (37% YoY growth). The Chess course surpassed 1 million daily users.

Duolingo Q3 2025: Revenue Beats, Guidance Raised Despite EPS Miss

At Duocon 2025, Duolingo announced LinkedIn integration for Duolingo Scores, Adventures immersive learning experience, Chess expansion to Android with PvP mode coming to iOS, and continued AI feature development including Video Call enhancements.

Duolingo Unveils Major Product Updates at Duocon 2025

Duolingo more than doubled its language offerings by launching 148 new courses, bringing the total to over 250 courses across 42 languages. The expansion makes Duolingo the most comprehensive language-learning platform globally.

Duolingo Launches 148 New Language Courses

Analysts highlight Duolingo's AI-driven growth strategy, with the company's valuation reaching $17.7 billion (247% surge since late 2021). AI features like Video Call with Lily and Duolingo Max are driving engagement and premium subscriber growth.

Here's Why 2025 Could Be a Big Year for AI Stock Duolingo

AdAge recognized Duolingo as the #1 Marketer of the Year for 2024, citing the company's innovative social media campaigns featuring Duo the owl, creative brand partnerships, and ability to make learning culturally relevant and entertaining.

Duolingo Named #1 Marketer of the Year by AdAge

Fast Company featured Duolingo in its Most Innovative Companies 2025 list, highlighting how the company uses behavioral psychology, gamification, and AI to maintain user engagement while achieving 40% revenue growth and 26% EBITDA margins.

Inside Duolingo's Strategy: Fast Company's Most Innovative Companies 2025

Duolingo CEO says AI is a better teacher than humans—but schools will still exist ‘because you still need childcare’

Duolingo CEO on going AI-first: ‘I did not expect the blowback’

My partner secretly studied Duolingo for 300 days to surprise me and now speaks perfect nonsense

I’m quitting. Duolingo just confirmed they are an awful company

Can’t believe people still think Duolingo is the best way to learn a language

Dear Duolingo, what the heck is this?

I regret using duolingo

And with that, I quit Duolingo.

After 300 day streak I realized Duolingo is harmful to language learning.

Unpopular oppinion: Duolingo is actually GREAT way to learn new language

duolingo

languagelearning

technology

LearnJapanese

Duolingo, Inc.

The Effects of Duolingo, an AI-Integrated Technology, on EFL Learners’ Willingness to Communicate and Engagement in Online Classes

Digital language learning with Duolingo: assessing its impact on listening, speaking, reading, and writing skills

Uncurtaining windows of motivation, enjoyment, critical thinking, and autonomy in AI-integrated education: Duolingo Vs. ChatGPT

Duolingo: A Qualitative Study on Vocabulary Acquisition

The Use of Gamification-Based Duolingo Application in Increasing Student Motivation is Reviewed From the Theory of Self-Determination

Thai EFL university students’ views on the effectiveness of Duolingo for enhancing listening and speaking skills

Pemanfaatan Aplikasi Duolingo dalam Meningkatkan Penguasaan Kosakata Bahasa Inggris

Exploring AI-powered gamified flipped classroom in an English-speaking course: a case of Duolingo

THE USE OF DUOLINGO APPS TO IMPROVE STUDENTS’ VOCABULARY MASTERY OF SMP NEGERI 4 PALU

Utilizing Mobile-Assisted Language Learning (Duolingo) to Foster Metacognitive Awareness and Self-Directed Learning in Non-English Major Students

Luis von Ahn and Severin Hacker began developing the concept for a free, gamified language-learning platform at Carnegie Mellon University.

Duolingo Concept Formulated

Duolingo officially incorporated with Luis von Ahn as CEO and Severin Hacker as CTO, funded by von Ahn's MacArthur Fellowship and NSF grant.

Company Founded

Raised $3.3 million led by Union Square Ventures, with participation from Tim Ferriss and Ashton Kutcher's A-Grade Investments.

Series A Funding

Launched private beta with six languages and over 100,000 people on the waiting list.

Private Beta Launch

Opened Duolingo to the public with 300,000 people on the waiting list, offering free language learning to everyone.

Public Launch

Secured $15 million led by New Enterprise Associates to scale the platform.

Series B Funding

Introduced crowdsourced Language Incubator, enabling community members to create courses for less common languages.

Language Incubator Launch

Raised $45 million led by Google Capital at $470 million valuation, bringing total funding to $83.3 million.

Series D Funding

Launched Duolingo English Test, a certification program that becomes widely accepted by universities worldwide as an alternative to TOEFL.

Duolingo English Test Launch

Raised $30 million from Alphabet's CapitalG at $1.5 billion valuation, achieving unicorn status.

Series F - Unicorn Status

Duolingo went public on NASDAQ at $102 per share, raising $490 million at $3.7 billion implied valuation.

Initial Public Offering

Launched Duolingo Max premium tier featuring AI-powered features including Explain My Answer and Roleplay powered by OpenAI's GPT-4.

Duolingo Max Launch with GPT-4

Expanded beyond languages by launching math and music courses, demonstrating vision to become a multi-subject learning platform.

Math & Music Courses Launch

Introduced AI-powered Video Call feature allowing Max subscribers to have spontaneous conversations with character Lily in nine popular languages.

Video Call with Lily Feature

Launched 148 new language courses, more than doubling offerings and reaching 250+ total courses across 42 languages.

148 New Language Courses Launch

Launched Duolingo Chess on iOS, which became the fastest-growing subject in company history, surpassing 1 million daily active users.

Duolingo Chess Launch

Announced LinkedIn integration for Duolingo Scores and launched Adventures, an immersive game-like exploration experience for language learners.

LinkedIn Integration & Adventures

Feeling overwhelmed by parenting questions and confusing ingredient lists? Duckie is your smart parenting companion—scan products for safety AND chat with your personal AI assistant about your child's

Duckie is a United States-based AI customer support company founded in 2023 building AI support agents platform raising $500K from Y Combinator Andreessen Horowitz Greylock KungHo Fund Netflix plus 5 additional investors achieving 80 percent resolution time reduction 71 percent support ticket deflection participating in Y Combinator Winter 2024 batch based in San Francisco CA targeting customer support teams through AI agent builder enabling tasks processes translation into predictable reliable AI workflows reducing resolution times deflecting tickets automating support operations customer service AI automation workflow creation minutes deployment rapid implementation.

A web application built with AngularJS to track your favorite tv-shows with semi-automagic torrent integration

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Self-driving car simulator for the Duckietown universe

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duckietown-lx

Source code for our paper "Sim-to-real reinforcement learning applied to end-to-end vehicle control"

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