Duolingo

Duolingo is a US education technology company best known for combining short digital lessons with gamification, personalization, experimentation and artificial intelligence. What began primarily as a language-learning app has developed into a broader mobile learning platform spanning languages, Math, Music, Chess, premium subscriptions and the Duolingo English Test.

By the second quarter of 2026, Duolingo reported 140.6 million monthly active users, 58.7 million daily active users and 12.7 million paid subscribers, giving the company one of the largest active audiences in consumer education.

Last updated: September 6, 2026

About Duolingo

Duolingo, Inc. is an education technology company headquartered in Pittsburgh, Pennsylvania. It develops digital learning products designed around short interactive sessions, visible progress, personalization and game-like engagement.

The company is still closely associated with language learning, but its scope is broader than its original product. Duolingo now presents itself increasingly as a mobile learning platform capable of applying the same underlying learning system to different subjects.

Its business is distinctive because education, consumer software and behavioral product design are closely connected. Duolingo does not simply provide digital course content. It also uses streaks, XP, leagues, characters, machine learning and continuous experimentation to encourage learners to return frequently.

The company's stated mission is to develop the best education in the world and make it universally available. Its free-access model remains an important part of that objective while also serving a commercial role by creating a very large pool of potential subscribers.

What Does Duolingo Do?

Duolingo develops digital products that help people learn and practise skills through mobile and web-based experiences.

Its main activities fall into several areas:

• language learning

• premium consumer subscriptions

• English proficiency testing

• Math education

• Music learning

• Chess instruction

• AI-powered personalization and conversation practice

The core Duolingo experience breaks learning into relatively short activities rather than relying on long lectures or conventional classroom sessions.

Depending on the course, learners may practise vocabulary, listening, reading, pronunciation, sentence construction, speaking or other interactive exercises.

Behind those activities, Duolingo uses learner interaction data to help determine difficulty, personalize practice and improve course design.

A simplified version of the product loop is:

complete a lesson → receive feedback → see progress → return for another lesson → generate more learning data

This loop matters to Duolingo as both an education company and a technology business. Repeated learning gives users more opportunities to improve while giving Duolingo more information with which to test and refine its product.

Gamification and Daily Engagement

Gamification is one of the clearest differences between Duolingo and conventional educational software.

The platform uses mechanics such as:

• daily streaks

• XP

• leagues

• leaderboards

• achievements

• challenges

• rewards

• characters

• progress indicators

The objective is not simply to make lessons entertaining.

Learning produces rewards slowly. A person studying a new language may need months or years before reaching the larger goal of fluency. Duolingo creates smaller signals of progress that appear much sooner.

The streak is a particularly important example. Rather than asking a learner to focus only on a distant objective such as becoming fluent, it turns the immediate goal into something much simpler: complete learning activity today and keep the streak alive.

That makes consistency itself visible.

Duolingo Business Model

Duolingo operates primarily through a freemium business model.

Most learners can begin using its core educational product without paying. Duolingo then monetizes a smaller portion of that audience through premium subscriptions while generating additional revenue through advertising, the Duolingo English Test and in-app purchases.

The model works because free users are not valuable only if they immediately become subscribers.

They can also:

• generate advertising revenue

• become future paying subscribers

• recommend Duolingo to other learners

• increase brand visibility

• generate learning and behavioral data

• participate in product experiments

This keeps the top of Duolingo's acquisition funnel unusually wide.

Duolingo can attract a large population of learners first and monetize different users in different ways later.

The company's business model can be simplified as:

free access → large audience → repeat engagement → subscription conversion and other monetization → more data and experimentation → product improvement → additional growth

Subscriptions now provide most of Duolingo's revenue, which means the business depends on maintaining a useful free product while giving its most engaged users enough additional value to pay for Super Duolingo or Duolingo Max.

How Does Duolingo Make Money?

Subscriptions are Duolingo's largest revenue source.

For the year ended December 31, 2025, Duolingo reported approximately $1.038 billion in total revenue, compared with roughly $748.0 million in 2024.

Subscription revenue reached approximately $873.4 million.

Subscription Revenue

Subscriptions are the core monetization engine.

Duolingo's principal paid offerings include Super Duolingo and the higher-tier Duolingo Max.

The company increased subscription revenue from approximately $607.5 million in 2024 to $873.4 million in 2025.

The central challenge is balancing monetization with accessibility.

If too much value moves behind a paywall, the free product can become less attractive and weaken user growth. If premium subscriptions offer too little additional value, users have less reason to upgrade.

Duolingo therefore needs free learning to remain useful while making its paid tiers sufficiently differentiated.

Advertising

Free users may see advertisements as part of the learning experience.

Advertising generated approximately $79.7 million in 2025, compared with about $54.9 million in 2024.

Advertising means a learner does not necessarily need to become a subscriber before contributing revenue.

Duolingo English Test Revenue

The Duolingo English Test generated approximately $42.0 million in revenue in 2025.

Its economics differ from the subscription app because a test taker pays for a specific assessment rather than necessarily maintaining a recurring subscription.

In-App Purchases

Duolingo also generates revenue from virtual goods and other in-app transactions.

In-app purchases contributed approximately $40.5 million in 2025.

Together, these revenue streams allow Duolingo to monetize different types of users without requiring everyone to follow the same customer journey.

Products and Services

Duolingo's product portfolio now extends beyond its original language-learning app.

Duolingo Language Learning

Language learning remains Duolingo's flagship product.

The company reported more than 250 language courses, covering widely studied languages such as English, Spanish, French, German, Italian, Portuguese, Japanese and Chinese.

Language learning remains strategically important because it represents Duolingo's most mature content system, largest established audience and strongest brand association.

Super Duolingo

Super Duolingo is the company's primary premium subscription.

Its role is to provide an upgraded experience for users willing to pay while allowing the basic learning product to remain broadly accessible.

This structure supports the company's freemium model: a very large free user base feeds a smaller recurring-revenue subscriber base.

Duolingo Max

Duolingo Max is a higher-tier subscription that includes more advanced AI-enabled learning functionality.

One of its most visible features is Video Call, which allows learners to practise conversation with Duolingo characters such as Lily.

Max is important to the business because generative AI is not only being used internally to improve Duolingo. Some AI functionality has become part of the premium product consumers pay to access.

Duolingo English Test

The Duolingo English Test, commonly called the DET, is an online English proficiency assessment used for admissions and other institutional purposes.

By 2026, Duolingo said the test was recognized by more than 6,500 programs worldwide.

Its digital delivery model gives Duolingo a position in the education assessment market as well as the consumer learning market.

Duolingo Math, Music and Chess

Math, Music and Chess represent Duolingo's broader move beyond language education.

Their significance is greater than the individual subject areas.

They test whether the capabilities behind Duolingo's language success—short lessons, personalization, visible progress, gamification, experimentation and recognizable characters—can work across unrelated skills.

If that model transfers successfully, Duolingo's long-term addressable market becomes much larger than language learning alone.

Customers and Markets

Duolingo primarily operates as a global consumer education platform, but its products serve more than one type of customer.

Free Learners

The largest group consists of consumers using the core learning product without paying.

These users are essential to Duolingo's scale, organic distribution and experimentation system.

They may also generate advertising revenue or eventually move into a paid subscription.

Paid Subscribers

Paid subscribers are Duolingo's most important direct consumer revenue group.

As of June 30, 2026, the company reported approximately 12.7 million paid subscribers.

These users subscribe primarily to products such as Super Duolingo and Duolingo Max.

Students and Test Takers

The Duolingo English Test serves students and other applicants who need to demonstrate English proficiency.

This customer group interacts with Duolingo differently from ordinary app learners because the primary transaction is an assessment rather than an ongoing learning subscription.

Educational Institutions and Programs

Universities and other programs form the institutional side of the Duolingo English Test ecosystem.

Duolingo reported that more than 6,500 programs recognized the DET by 2026.

Geographic Market

Duolingo serves a global audience rather than concentrating only on the United States.

Its free-access model is particularly suited to international distribution because a learner can begin using the platform without purchasing a conventional language course or attending a physical learning center.

The platform's expansion into additional course-language combinations has also helped make major learning languages available to speakers of more native languages.

Competitors

Duolingo competes across several overlapping markets rather than against one single group of companies.

Language Learning Competitors

Major competitors in digital language learning include:

• Babbel

• Busuu

• Rosetta Stone

• Memrise

• Mondly

• HelloTalk

• italki

• Preply

The competitive models differ.

Some companies emphasize self-directed digital courses, while others focus more heavily on tutors, native-speaker interaction or live instruction.

Duolingo's position is built around low-friction access, mobile-first learning, gamification and large-scale personalization.

AI Language Tutors

Generative AI has created a newer competitive category.

General-purpose tools such as ChatGPT, Gemini and Claude can provide:

• translation

• grammar explanations

• generated exercises

• writing feedback

• conversation practice

This creates both an opportunity and a threat for Duolingo.

AI makes Duolingo's own product more capable, but it also lowers the technical barrier to creating competing educational experiences.

Duolingo therefore needs to compete on more than chatbot access. Its stronger differentiation lies in combining AI with structured curriculum, progression, motivation, personalization and an established learning habit.

English Testing Competitors

The Duolingo English Test competes with established English proficiency assessments such as:

• TOEFL

• IELTS

• PTE Academic

Duolingo's test differentiates itself partly through digital delivery and convenience, although specific institutions and programs determine which tests they accept.

Broader Learning Platforms

As Duolingo expands into Math, Music and Chess, it increasingly competes with specialized education apps and subject-specific learning platforms outside language education.

That means the company's competitive set is likely to broaden if its multi-subject strategy continues.

Company History

Duolingo's history can be understood through a small number of milestones that changed either its scale, business model or strategic direction.

Founding and Early Idea

Duolingo grew from Luis von Ahn's interest in using technology to make education more accessible.

Von Ahn, who grew up in Guatemala and later became a computer science professor at Carnegie Mellon University, worked with graduate student Severin Hacker on what became Duolingo.

The founders approached education as a technology problem as well as a curriculum problem.

Rather than relying only on static educational material, they envisioned a system that could collect learning data, observe learner behavior and improve through experimentation.

Public Launch in 2012

The Duolingo app became publicly available on June 19, 2012.

Its core proposition was unusually simple: users could begin learning a language without paying for the main experience.

That free model became one of the foundations of Duolingo's later growth.

Subscription Monetization

Duolingo introduced a paid subscription offering in 2017.

This created an important change in the business model.

The company could preserve free access while offering additional value to users willing to pay. The subscription system later developed into Super Duolingo and Duolingo Max.

Duolingo IPO

Duolingo completed its initial public offering in July 2021.

The IPO price was $102 per share. The company sold approximately 4.5 million shares itself and generated roughly $455.5 million in gross proceeds before underwriting costs and other offering expenses.

Its Class A shares began trading under the ticker DUOL.

Expansion Beyond Languages

Math and Music arrived in 2023, followed later by Chess.

That move changed the strategic interpretation of Duolingo.

The company was no longer simply expanding its language catalogue. It was testing whether its core learning system could function as a platform for multiple subjects.

Leadership

Duolingo remains strongly influenced by its founders.

Luis von Ahn — Co-Founder and CEO

Luis von Ahn is Duolingo's co-founder and Chief Executive Officer.

Before Duolingo, he became widely known for his work involving CAPTCHA and reCAPTCHA, which Google acquired in 2009.

His background in computer science and human-computer interaction is closely aligned with Duolingo's emphasis on large-scale user behavior, experimentation, machine learning and product iteration.

Von Ahn also remains directly involved in the company's strategic direction, including its expansion into AI and additional learning subjects.

Severin Hacker — Co-Founder and CTO

Severin Hacker is Duolingo's co-founder and Chief Technology Officer.

He studied computer science at ETH Zurich before completing doctoral work at Carnegie Mellon University, where he worked with von Ahn.

Hacker has played an important role in Duolingo's technical development and remains part of the company's current leadership.

The continued presence of both founders means Duolingo's original technical orientation remains closely connected to its current operating strategy.

Ownership, Subsidiaries and Corporate Structure

Duolingo, Inc. is a publicly traded company.

Its Class A shares trade on the Nasdaq Stock Market under the ticker DUOL.

Because Duolingo is public, ownership is distributed among shareholders rather than controlled by a single private owner. Institutional investors, individual shareholders, founders and other insiders may all hold shares.

Current ownership percentages can change over time and should be interpreted from the company's latest SEC ownership filings rather than treated as permanent figures.

At the operating level, Duolingo's major activities include its consumer learning platform and the Duolingo English Test business.

The company's public filings describe Duolingo as a mobile learning platform rather than a traditional education company organized primarily around physical schools or training centers.

Duolingo Strategy

Duolingo's current company-level strategy can be understood around five connected priorities:

1.                        grow the global learner base

2.                        improve engagement and learning quality

3.                        increase premium subscription value

4.                        use AI to scale personalization and content

5.                        expand the Duolingo learning model into additional subjects

Product-Led and Organic Growth

Duolingo has historically benefited from organic growth, brand recognition, social sharing and word of mouth.

A simplified version of the company's growth flywheel is:

better product → higher engagement → more word of mouth → more learners → more data → better product

This is strategically important because organic awareness can reduce dependence on buying every new user through advertising.

The company's distinctive brand personality also supports that model. Duo the owl and Duolingo's unusual social-media tone have made the company recognizable beyond people actively searching for language courses.

Continuous Experimentation

A/B testing is deeply embedded in Duolingo's product-development process.

The company has said that it runs more than 750 A/B tests per quarter.

These experiments can examine:

• learner retention

• lesson completion

• engagement

• subscription conversion

• learning efficacy

• user growth

The competitive advantage is not simply having a feature such as a streak or leaderboard.

Those features can be copied.

The harder capability is having enough users, data and experimentation infrastructure to determine which version of a feature works, for whom and under what conditions.

Artificial Intelligence and Personalization

Machine learning has been part of Duolingo for years.

One example is Birdbrain, a system designed to estimate learner knowledge and exercise difficulty so lessons can be better matched to individual users.

Generative AI has expanded that strategy.

Duolingo now uses AI in three broad areas:

• personalization

• content production

• premium interactive experiences

The company reported producing approximately 7,500 content units in 2024 compared with 425 in 2021, illustrating how technology has accelerated content creation.

Video Call and Premium AI

Video Call is one of Duolingo's clearest consumer-facing generative AI features.

Learners can practise conversation with Duolingo characters such as Lily rather than completing only predetermined exercises.

This type of feature is strategically important because AI becomes part of what premium users pay for, rather than functioning only as back-end technology.

AI-First Operating Strategy

Duolingo attracted substantial attention in 2025 when Luis von Ahn described the company as becoming increasingly AI-first.

The strategy involved using AI for work that could be automated and reconsidering some contractor-based workflows.

The announcement also created criticism around the relationship between automation and human language work.

Duolingo's position has been that human experts continue to play an important role in validating and improving AI-generated educational material.

At the company level, the larger strategic issue is whether AI can help Duolingo increase educational output and personalization without weakening quality.

Expansion From Language App to Learning Platform

Duolingo's long-term strategy is moving in two directions at once.

The first is depth: making language learning more personalized, conversational and effective.

The second is breadth: applying its learning model to more subjects.

Math, Music and Chess are the clearest evidence of this second strategy.

Management has also described a long-term ambition of eventually teaching one billion people, which suggests that Duolingo sees its future as a broad global learning platform rather than exclusively a language app.

Key Challenges and Risks

Duolingo's growth creates several company-specific risks.

Some are explicitly reflected in the company's regulatory disclosures, while others arise from the strategic direction of the platform.

Converting Free Users Into Subscribers

A very large free audience is one of Duolingo's strengths, but the company still needs to convert enough learners into paying subscribers to sustain revenue growth.

The challenge is maintaining this balance without making the free experience unattractive.

A weaker free product could damage acquisition, while a premium product with too little differentiation could reduce conversion.

Maintaining Learning Quality at Scale

Engagement and education are related but not identical.

A learner can maintain a streak or earn XP without necessarily achieving the most efficient learning outcome.

As Duolingo expands its courses and subjects, the company must continue showing that higher engagement supports meaningful educational progress rather than becoming an end in itself.

Generative AI Competition

General-purpose AI assistants can already perform tasks such as:

• translation

• grammar explanation

• tutoring

• conversation practice

• exercise generation

This reduces the defensibility of AI conversation as a standalone feature.

Duolingo therefore needs to offer something more structured than access to a general language model.

Its stronger position comes from combining AI with curriculum, learner history, progression, gamification and established habits.

AI Costs

Generative AI also creates infrastructure expense.

Duolingo reported that higher AI usage contributed to increased technology costs and affected the economics of features such as Video Call.

That creates a direct tradeoff: an AI feature can improve the product while also raising the cost of serving subscribers.

The relevant business question is whether the additional engagement, conversion or subscription value justifies the expense.

Human Expertise and AI Quality

Generating educational material at large scale creates risks involving accuracy, nuance and cultural context.

Language education is particularly sensitive because a technically possible translation may still be unnatural or inappropriate in context.

Human review therefore remains important even as automation increases.

Expansion Beyond Languages

Success in language learning does not guarantee the same outcome in Math, Music or Chess.

Different subjects may require different teaching structures.

The company must prove that its underlying learning model transfers across categories rather than assuming that the mechanics behind language learning will work equally well everywhere.

Dependence on App Platforms

Duolingo relies heavily on major mobile distribution ecosystems.

Its 2025 annual report said Apple and Google accounted for approximately 62% and 20% of revenue, respectively, through their app-store ecosystems.

This creates exposure to:

• app-store policies

• payment rules

• platform fees

• changes in distribution

• decisions made by third parties

These are areas Duolingo cannot fully control.

Key Facts About Duolingo

Duolingo Has More Than 140 Million Monthly Active Users

During Q2 2026, Duolingo reported approximately 140.6 million monthly active users.

That scale gives the company an unusually large base for product experimentation and learning data.

Nearly 59 Million People Use Duolingo Daily

Duolingo reported approximately 58.7 million daily active users during Q2 2026.

The gap between monthly and daily usage is strategically important because Duolingo's model depends heavily on making learning a frequent habit rather than an occasional activity.

Duolingo Has More Than 12 Million Paid Subscribers

As of June 30, 2026, Duolingo reported approximately 12.7 million paid subscribers.

The company therefore monetizes only a fraction of its total active audience through subscriptions while keeping the wider learning funnel free.

Users Complete Close to Two Billion Exercises Per Day

By late 2025, Duolingo said learners were completing close to 2 billion exercises per day.

That volume gives the company a substantial stream of interaction data for experimentation, machine learning and product development.

Duolingo Runs More Than 750 A/B Tests Per Quarter

Duolingo has said its teams run more than 750 A/B tests per quarter.

Few visible product features explain Duolingo's position as clearly as the experimentation system behind them.

Features such as streaks can be copied quickly; an organization capable of testing hundreds of product changes against a massive active audience is harder to reproduce.

Duolingo Operates Beyond Language Learning

Math, Music and Chess have moved Duolingo beyond being exclusively a language-learning platform.

This is strategically significant because the company's future growth increasingly depends on whether its learning system can work across subjects.

AI Supports Both Production and Monetization

AI plays two distinct roles inside Duolingo.

It can reduce the time required to create and adapt educational content, while premium AI features such as conversational practice can also support subscription monetization.

That makes AI both an operating technology and a product strategy.

The Duolingo English Test Connects Consumer EdTech With Institutional Education

The DET gives Duolingo a different type of education business from its consumer subscriptions.

Instead of monetizing only learners inside the app, the company also participates in the formal assessment market used by students and educational programs.

Frequently Asked Questions

Who Founded Duolingo?

Duolingo was founded by Luis von Ahn and Severin Hacker. Both are computer scientists, and both remain important to the company's leadership and technical direction.

When Was Duolingo Founded?

Duolingo, Inc. was formed on August 18, 2011. The consumer app became publicly available on June 19, 2012.

How Does Duolingo Make Money?

Duolingo makes most of its money from paid subscriptions. It also earns revenue from advertising, the Duolingo English Test, in-app purchases and smaller additional sources.

In 2025, subscriptions generated approximately $873.4 million of the company's $1.038 billion in total revenue.

Is Duolingo Publicly Traded?

Yes. Duolingo trades on the Nasdaq Stock Market under the ticker DUOL.

The company completed its IPO in July 2021 at $102 per share.

Who Owns Duolingo?

Duolingo is publicly traded, so ownership is distributed among shareholders rather than belonging to one private owner.

Founders, other insiders, institutional investors and individual investors may all hold shares. Exact ownership percentages change over time.

Is Duolingo Profitable?

Duolingo reported positive operating income and net income in 2025.

Its 2025 net income was unusually high because the year included a substantial income-tax benefit, so the headline net-income figure should not be interpreted as purely recurring operating profit.

The company reported approximately $135.6 million in operating income for 2025.

How Many Users Does Duolingo Have?

For Q2 2026, Duolingo reported approximately 140.6 million monthly active users and 58.7 million daily active users.

How Many Paid Subscribers Does Duolingo Have?

Duolingo reported approximately 12.7 million paid subscribers as of June 30, 2026.

Is Duolingo Only a Language-Learning Company?

No.

Languages remain Duolingo's core business, but the platform has expanded into Math, Music and Chess. The company is increasingly positioning itself as a broader mobile learning platform.

Sources:

Duolingo Q2 2026 Form 10-Q

Duolingo 2025 Annual Report

Duolingo 2021 SEC Filing

Duolingo Company Strategy

Improving Duolingo One Experiment at a Time

Introducing Birdbrain

Duolingo Video Call

Universities and Programs That Accept the Duolingo English Test