Introduction

Duolingo Statistics: In 2024, Duolingo, the most popular language-learning app globally, met with remarkable success. As of 2024, the platform boasts over 100 courses in 41 languages and has surpassed 950 million downloads. In 2024, Duolingo achieved a revenue of $748 million, marking a 40.8% increase from the previous year. The company reported 103 million monthly active users and 34.1 million daily active users in 2024, reflecting a 51% year-over-year growth in daily engagement.

Additionally, Duolingo had 6.6 million paid subscribers by the end of 2023 .The platform's expansion is further evidenced by its offering of new subjects such as chess and the integration of generative AI to enhance educational content. These developments underscore Duolingo's commitment to broadening its educational reach and leveraging technology to improve user experience. This article will take a deep dive into the performance of Duolingo statistics in 2024 and focus on different trends and developments that shaped its success.

During the fourth quarter of 2024, Duolingo had approximately 116.7 million monthly active users (MAUs) of the app. This represented an increase of around three percent compared to the previous quarter. Between the third quarter of 2020 and the end of 2024, Duolingo's monthly active users experienced a positive growth trend. How does Duolingo make money? Duolingo’s revenue witnessed an upward trend between 2020 and 2024, reaching a value of more than 178 million U.S. dollars during the second quarter of 2024. Duolingo Inc. generates revenue through its multiple services including app subscriptions, advertising, Duolingo English test, and in-app purchases. Subscriptions contributed the largest share to Duolingo’s revenue stream as the company generated over 400 million U.S. dollars solely from user subscriptions in 2023. In contrast, in-app purchases such as those generated by the selling of “gems”, Duolingo virtual currency that allow users to buy exclusive features and hints, generated around 35 million U.S. dollars in the last examined year. While the app attracted language learners from all markets, the United States was the country with the largest share of revenue, amounting to almost 240 million U.S. dollars in 2023. Duolingo leads the language learning apps market Language learning app publishers offer apps with a variety of interactive features for users. In 2024, Duolingo led the language learning apps market both in terms of number of downloads and yearly revenues. In July 2024, the popular language learning app recorded more than 14 million monthly downloads worldwide. Lingutown and Buddy.ai followed with 1.98 and 1.63 million monthly downloads, respectively. During the examined period, Duolingo was the highest-grossing language learning app and generated a revenue of more than 33 million U.S. dollars. Babbel ranked second with a revenue of 5.4 million U.S. dollars.What primarily motivates users to access language learning platforms? In 2023, the leading reason for using language learning apps in the United States was the desire to learn, as almost one-quarter of respondents reported they engaged with apps in this category out of curiosity. To have fluency in another language and travelling followed, 23 and 17 percent of respondents reporting to use language learning apps for these reasons, respectively.

During the fourth quarter of 2024, Duolingo had approximately 40.5 million daily active users (DAU) practicing their language of choice on the platform. This represents an increase of almost 51 percent year-over-year, as well as a quarterly growth of around nine percent. Between the third quarter of 2020 and the end of 2024, Duolingo's daily active users experienced a constant increase.

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Duolingo is an American educational technology company that produces learning apps and provides language certification. There main app is considered the most popular language learning app in the world.

To progress in their learning journey, each user of the application needs to complete a set of lessons in which they are presented with the words of the language they want to learn. In an infinite set of lessons, each word is applied in a different context and, on top of that, Duolingo uses a spaced repetition approach, where the user sees an already known word again to reinforce their learning.

Each line in this file refers to a Duolingo lesson that had a target word to practice.

The columns are as follows:

• p_recall - proportion of exercises from this lesson/practice where the word/lexeme was correctly recalled
• timestamp - UNIX timestamp of the current lesson/practice
• delta - time (in seconds) since the last lesson/practice that included this word/lexeme
• user_id - student user ID who did the lesson/practice (anonymized)
• learning_language - language being learned
• ui_language - user interface language (presumably native to the student)
• lexeme_id - system ID for the lexeme tag (i.e., word)
• lexeme_string - lexeme tag (see below)
• history_seen - total times user has seen the word/lexeme prior to this lesson/practice
• history_correct - total times user has been correct for the word/lexeme prior to this lesson/practice
• session_seen - times the user saw the word/lexeme during this lesson/practice
• session_correct - times the user got the word/lexeme correct during this lesson/practice

The lexeme_string column contains a string representation of the "lexeme tag" used by Duolingo for each lesson/practice (data instance) in our experiments. The lexeme_string field uses the following format:

`surface-form/lemma

By the end of 2024, the number of Duolingo paid subscribers rose to 9.5 million worldwide, up by around 43 percent year-over-year. Duolingo is a language-learning website and mobile application that allows users to join language courses for free, or subscribe to gain access to premium features and functionalities. In 2023, subscriptions generated 76 percent of the company's revenues, followed by advertising revenue with a share of nine percent.

At the end of the fourth quarter of 2024, Duolingo Inc. registered 9.5 million paid subscribers worldwide, up by over 10 percent when compared to the previous quarter. Language learning apps tend to experience a surge in usage during the first and the third quarter of each year, due to consumers' seasonal preferences. At the end of 2023, the total number of Duolingo users who subscribed to its premium services was 6.6 million worldwide.

This is the dataset for the 2020 Duolingo shared task on Simultaneous Translation And Paraphrase for Language Education (STAPLE). Sentence prompts, along with automatic translations, and high-coverage sets of translation paraphrases weighted by user response are provided in 5 language pairs. Starter code for this task can be found here: github.com/duolingo/duolingo-sharedtask-2020/. More details on the data set and task are available at: sharedtask.duolingo.com

The global online language learning market, valued at $34.42 billion in 2025, is experiencing robust growth, projected to expand at a compound annual growth rate (CAGR) of 27.5% from 2025 to 2033. This explosive growth is fueled by several key factors. Increased accessibility to high-speed internet and affordable devices has democratized language learning, making it convenient and cost-effective for individuals worldwide. The rising demand for multilingual professionals in a globalized economy is another significant driver, pushing both individuals and corporations to invest in online language training. Furthermore, innovative technological advancements, such as AI-powered language learning apps and personalized learning platforms, are enhancing the learning experience and driving user engagement. The market is segmented by end-user (courses, solutions, apps), language (English, Mandarin, Spanish, others), and geography, with significant regional variations in adoption rates. North America and Europe currently hold substantial market share, but the Asia-Pacific region, particularly China and India, is poised for significant growth due to its large population and increasing disposable incomes. Competition is intense, with established players like Babbel, Duolingo, and Rosetta Stone facing challenges from new entrants leveraging advanced technologies and personalized learning approaches. The market’s future trajectory hinges on factors such as continued technological innovation, evolving user preferences, and the ability of companies to adapt to shifting educational trends. The competitive landscape is characterized by a mix of established educational institutions, technology companies, and specialized language learning platforms. While established players benefit from brand recognition and extensive course offerings, newer entrants are leveraging technological advancements such as artificial intelligence and gamification to attract and retain users. Strategic partnerships, mergers, and acquisitions are common, reflecting the dynamic nature of the market. The market's future success depends on the continued development of engaging and effective learning methodologies, addressing the challenges of maintaining user engagement over extended periods, and catering to diverse learning styles and preferences. Addressing concerns around data privacy and security will also be crucial for sustained growth and market confidence. Future projections suggest a continued upward trend, driven by the increasing demand for language skills in both personal and professional settings.

This study examined the impact of Duolingo, a ubiquitous mobile language learning application, on developing second language (L2) reading and writing skills. Prior research suggested that Duolingo's emphasis on translating sentences and identifying vocabulary might positively impact these receptive skills. To investigate this further, the study employed a mixed-methods approach, combining quantitative data gleaned from user progress on Duolingo with Cambridge approved reading & writing tests of A2 level and a qualitative analysis of metaphorical perceptions collected from participants. The findings revealed positive developments, albeit with limitations. Learners demonstrated improved vocabulary knowledge, expanding their ability to recognize and understand words in context. Additionally, they gained proficiency in constructing basic sentences, laying the groundwork for written communication. However, limitations were identified. The program's emphasis on gamification and short, repetitive exercises may not adequately address the complexities of L2 grammar. Furthermore, the lack of dedicated writing prompts or opportunities to practice with complex writing tasks restricts the development of more advanced writing skills. Future research could explore the effectiveness of combining Duolingo with traditional writing instruction to address these limitations. This approach might offer a more comprehensive strategy for L2 literacy development, encompassing both recognition and production skills. By leveraging Duolingo's strengths in building vocabulary and basic sentence structure alongside traditional writing instruction that focuses on grammar and complex tasks, learners could achieve a more well-rounded development of their L2 literacy skills.

The vocabulary builder app market is experiencing robust growth, driven by the increasing demand for language learning and skill development in both personal and professional spheres. The market's expansion is fueled by several key factors, including the rising popularity of mobile learning, the accessibility and affordability of apps compared to traditional methods, and the gamified learning experiences offered by many applications. Furthermore, the integration of artificial intelligence (AI) and personalized learning features within these apps significantly enhances user engagement and learning outcomes. The market size in 2025 is estimated at $1.5 billion, considering the substantial user base and market penetration of popular vocabulary apps such as Duolingo and Quizlet. A Compound Annual Growth Rate (CAGR) of 15% is projected from 2025 to 2033, suggesting a market value exceeding $5 billion by 2033. This growth is expected across various segments, including apps targeting different age groups (children, adults, professionals), language proficiency levels (beginner to advanced), and specific learning styles (visual, auditory, kinesthetic). Competitive pressures among established players like Duolingo and newer entrants continuously push innovation and improve the quality and accessibility of vocabulary building apps. However, challenges remain, such as the need to maintain user engagement, ensuring data privacy and security, and overcoming language barriers in targeting diverse global markets. The competitive landscape is highly dynamic, with both established players and new entrants vying for market share. Key players like Duolingo and Quizlet have established strong brand recognition and extensive user bases, leveraging their early-mover advantage and consistent product innovation. However, smaller companies and startups are innovating with personalized learning approaches, AI-powered tools, and unique gamification strategies. Regional variations in market growth are anticipated, with North America and Europe leading initially, followed by significant growth in Asia-Pacific due to its large population and increasing smartphone penetration. The market's future trajectory will significantly depend on the continuous improvement of app features, successful strategies for user acquisition and retention, and the effective adaptation to evolving technological landscapes and user preferences.

The Language Learning Development Software market is experiencing robust growth, driven by increasing globalization, the rising demand for multilingual professionals, and the convenience offered by digital learning platforms. The market's expansion is fueled by several key trends, including the integration of artificial intelligence (AI) for personalized learning experiences, the proliferation of gamified language learning apps engaging younger demographics, and the increasing accessibility of affordable and high-quality software solutions. While the market shows strong potential, challenges remain. These include concerns about data privacy and security in online learning platforms, the need for continuous software updates to keep pace with technological advancements, and the varying levels of digital literacy across different demographics globally. The market is segmented by software type (e.g., vocabulary builders, grammar trainers, conversation practice tools) and application (e.g., education, corporate training, personal use). Major players like Berlitz, Fluenz, Rosetta Stone, and Transparent Language are actively competing, focusing on innovation and user experience to capture market share. Given the projected CAGR and considering the market's maturity and competitive landscape, a conservative estimate for the 2025 market size is around $2 Billion, with a projected CAGR of 15% leading to a market value exceeding $5 Billion by 2033. Regional variations will exist, with North America and Europe currently dominating the market due to higher adoption rates and disposable incomes, but significant growth is expected from Asia-Pacific in the forecast period. The competitive landscape is dynamic, with established players continually updating their offerings and new entrants emerging with innovative approaches. Success in this market depends on delivering personalized, engaging learning experiences that cater to diverse learning styles and preferences. The market’s future hinges on addressing challenges related to user retention, effective monetization strategies, and maintaining a competitive edge in a rapidly evolving technological landscape. Furthermore, effective marketing and partnerships with educational institutions and corporations will be crucial for continued market penetration and expansion. The ongoing evolution of AI and machine learning will play a significant role in shaping the future of language learning software, potentially leading to more personalized and effective learning experiences.

In the fourth quarter 2024, language learning app publisher Duolingo generated almost 209.6 million U.S. dollars in revenues, an increase of over eight percent compared to the previous quarter. Due to the coronavirus pandemic outbreak and the need for users to pass the time during the implementation of stay-at-home measures, Duolingo experienced unprecedented usage growth in 2020. The popular language learning app managed to maintain and expand its user base in 2022 and 2024, reaching more than 16.5 million downloads in the Asia-Pacific region.

The global grammar software market is experiencing robust growth, driven by the increasing demand for effective communication skills in both personal and professional settings. The rising adoption of technology in education, coupled with the expanding need for error-free written communication across various industries, fuels market expansion. While precise figures for market size and CAGR are unavailable, a reasonable estimate based on market trends and the presence of numerous established players and emerging startups suggests a market size exceeding $2 billion in 2025, experiencing a Compound Annual Growth Rate (CAGR) of approximately 15% from 2025 to 2033. This growth is propelled by several key factors: the proliferation of online learning platforms, the integration of AI-powered grammar checking tools into various software applications, and the increasing awareness of the importance of proper grammar for professional success. The market is segmented by application (students, parents, teachers, professionals) and type (grammar learning software, grammar checker software, others), with grammar checker software currently dominating the market due to its ease of use and immediate feedback. However, the grammar learning software segment is also showing significant growth potential due to its comprehensive approach to improving grammatical skills. Geographical distribution shows a strong concentration in North America and Europe, reflecting higher levels of technology adoption and disposable income. However, Asia-Pacific is emerging as a rapidly growing market, particularly in countries like India and China, due to the increasing number of internet users and the growing demand for English language proficiency. Restraints on market growth include the availability of free alternatives, concerns regarding data privacy, and the potential for over-reliance on technology in the learning process. Nevertheless, ongoing innovations in AI and machine learning are poised to address some of these challenges, opening new avenues for growth within the grammar software market. The competitive landscape is highly fragmented, with a mix of established educational companies, technology firms, and smaller independent developers vying for market share. The future trajectory suggests a continued rise in market value, driven by advancements in AI-powered grammar tools and increasing demand for personalized learning experiences.

In the first half of 2024, Duolingo generated approximately 3.5 million downloads in Indonesia, while the popular language learning app amassed around 3.2 million downloads from users in Vietnam across the Google Play Store and the Apple App Store. Additionally, Duolingo generated 2.4 million downloads from users in Japan during the examined period. Mobile video and language learning app Cake generated over 104 thousand downloads in South Korea, the market where the app was launched first, as well as 240 thousand downloads in Vietnam.

In 2020, the number of Duolingo users who joined the platform that year and booked a subscription for its premium services corresponded to 53 percent of the total paid subscribers, while 47 percent of paid subscriptions came from users who had joined Duolingo in the previous years. Between 2018 and the end of 2020, the share of first-time paid subscribers who joined the platform as users in previous years has experienced a constant increase, showing that the platform has a high stickiness level.

During the fourth quarter of 2023, Duolingo registered almost 42 million downloads worldwide. As of the last examined quarter, language-learning app Duolingo recorded approximately 11 million downloads in the North and Latin America region. Between the first quarter of 2017 and the end of 2022, North and Latin America have consistently registered the highest number of Duolingo app downloads. However, during the third quarter of 2023, mobile downloads of Duolingo reached over 21 million in the Asia-Pacific region.

In July 2024, Duolingo was the most popular language learning app worldwide based on monthly downloads, with around 14.3 million users downloading the app to their mobile devices during the month. Lingutown was the second most popular language learning app in the examined period, with almost two million downloads. Language learning apps focusing on language acquisition for children were also popular, with children-specific app Buddy.ai: Buddy.ai: Fun Learning Games generating 1.63 million downloads worldwide. Language learning apps, which combine learning gamification with language acquisition, have become an increasingly popular method to learn and practice a foreign language for both adults and kids.

In 2024, Duolingo Inc. reported net income of roughly 88.6 million U.S. dollars. Duolingo Inc. is the owner of the popular language-learning mobile app and website Duolingo. In 2024, the company grossed 748 million U.S. dollars from subscriptions, in-app purchases, advertising, and providing users with the possibility of taking an online English language proficiency exam.

In July 2024, Duolingo was by far the leading language learning mobile app, grossing roughly 33 million U.S. dollars via in-app purchase revenues during the month. Babbel ranked second, with over 5.4 million U.S. dollars generated on the mobile app. While Duolingo adopts a freemium model and is essentially free for users, Babbel offers a limited free trial period before asking users to choose a subscription plan. iHuman, which aims to increase literacy and Chinese character-writing ability in children, generated in-app revenues of 840,000 U.S. dollars during the measured period.

In August 2023, mobile language learning app Duolingo was reported to have suffered a large data breach. The United States was the most affected market with almost *********** data points of Duolingo users in the country exposed. South Sudan ranked second, with over *********** data points leaked, while Spain ranked third with *** thousand data points leaked.