Duolingo
Duolingo is a gamified language learning platform that teaches over 40 languages through bite-sized lessons and interactive exercises. The app uses streak mechanics, XP points, and leaderboards to encourage daily practice, available both free with ads and via premium subscriptions.
Score generated by AI agents based on publicly cited evidence and reviewed by the project maintainer. Not independently validated. Last assessed 2026-10-01. Score revised 2026-10-01: 52 → 41.
Score History
Timeline events are AI-curated from public reporting. Score trajectory is derived from documented events.
Duolingo opened a private beta in late 2011 and launched publicly in June 2012 as a completely free language course with no ads, premium tier or paywalls. Venture rounds funded it, and it planned to earn money by selling translations learners produced while practising. iPhone and Android apps followed, and the 2013 Incubator let volunteers build new courses.
The July 2014 Test Center, later the Duolingo English Test, began Duolingo's search for a revenue model as it dropped crowdsourced translation at the end of 2014. Duolingo for Schools launched free in January 2015, Google Capital led a $45M Series D, and ads served through a Google AdMob partnership began appearing after lessons for free users. Courses still relied on volunteer Incubator contributors.
Duolingo Plus launched in April 2017 at $9.99 a month, selling ad-free lessons and offline downloads, and the Health (later Hearts) system began capping free users' mistakes, with waiting or ads as the way back. An internal experimentation platform built that year let the company run hundreds of A/B tests at once. A 2018 study flagged the Android app among apps sending children's persistent identifiers to third parties.
Weekly leaderboards with promotion and demotion, optimized streak-saver notifications and the Birdbrain personalization model (in use from March 2020) made engagement the main growth engine. The pandemic brought 30 million new learners in weeks and a surge in English Test takers, Hearts reached more free users in late 2020, and the volunteer contributor program ended in March 2021 in favour of paid linguists.
Duolingo listed on Nasdaq at $102 a share in July 2021 with a dual-class structure that left Class B holders about 97.8% of voting power. In March 2022 it shut its decade-old community forums, and a peer-reviewed study documented anxiety and self-recrimination linked to its gamification. Plus was rebranded Super Duolingo in June 2022 with pricing unchanged.
The October 2022 switch from the skill tree to a fixed linear path disrupted the core learning workflow and drew a 15,000-signature petition. Data scraped from 2.6 million accounts through an exposed API circulated in 2023, the Max tier put GPT-4 features behind a $29.99 monthly plan in March 2023, and Math and Music courses began Duolingo's expansion beyond languages.
In January 2024 Duolingo confirmed it had cut about 10% of its contractors at the end of 2023 as it turned to GPT-4 for content and translation, and a second round reportedly hit writers in October 2024. Teacher tools in Duolingo for Schools were trimmed, Friend Streak (August 2024) added social pressure to keep daily streaks, and AI Video Call launched in September 2024 inside the Max tier.
The CEO's April 2025 'AI-first' memo said Duolingo would stop using contractors for work AI could do and tie headcount to automation; days later it launched 148 AI-built courses, and the backlash led it to wipe its TikTok and Instagram posts. Energy, which drains with every exercise including correct answers, began replacing Hearts in July 2025 and was pitched to investors as a driver of subscriber conversion. The in-house Duolingo Ads platform followed in October, and in November the stock fell 25% as the company began shifting investment toward user growth.
With its Q4 2025 results Duolingo said friction such as higher ad load and upsells had slowed user growth, and committed more than $50 million of foregone 2026 bookings to the free experience: fewer ads, longer trials, free AI speaking practice, and Video Call moved from Max to Super. It also authorized a $400 million buyback. Energy still rations free users, an ad-supported 'Lite' plan and pre-lesson sponsored videos are being tested, and Duolingo for Schools will close in July 2027.
Alternatives
Audio-focused method built around conversational speaking rather than gamified typing exercises. Scientifically developed and stable — no algorithmic treadmills or dark patterns. Better for people who learn by listening. Easy switch, though the approach is quite different from Duolingo's visual format.
Structured lessons designed by professional language teachers, without Duolingo's guilt-manipulation mechanics or energy-draining paywalls. Subscription-based with a cleaner free trial model. Easy switch — no progress data to migrate, just start fresh with a more honest product.
Dimensional Breakdown
Summaries below were written by AI agents based on the cited evidence. They are editorial interpretations, not independent research findings.
Dimension History
Timeline (74 events)
Duolingo Raises $3.3M Series A Funding
Duolingo announced $3.3 million in Series A funding led by Union Square Ventures, with participation from Tim Ferriss and Ashton Kutcher's A-Grade Investments. The funding supported the company's mission to make language education free and accessible worldwide.
Duolingo Launches Private Beta
Duolingo launched its private beta in late 2011 (TechCrunch, December 22, 2011: 'finally launching in private beta'), with a waiting list reported at more than 100,000 people by mid-December. The platform was conceived by Carnegie Mellon professor Luis von Ahn and PhD student Severin Hacker, with early work funded by von Ahn's MacArthur fellowship and NSF grants.
Duolingo Opens to the Public
After accumulating a waiting list of approximately 500,000 people, Duolingo launched to the general public on June 19, 2012. The platform offered completely free language learning with no ads, no premium tier, and no paywalls, funded by a crowdsourced translation business model.
Duolingo Raises $15M Series B
Duolingo raised $15 million in Series B funding led by New Enterprise Associates, with participation from Union Square Ventures. The company was growing rapidly with its free model and crowdsourced translation revenue stream.
Duolingo Launches iPhone App
Duolingo released its iPhone app, extending the free language learning platform to mobile devices. The app was named Apple's iPhone App of the Year in 2013.
Duolingo Launches Android App
Duolingo released its Android app when the platform had approximately 3 million users, significantly expanding its reach beyond iOS and web. The app maintained the fully free model with no premium tier.
Duolingo Incubator Launches for Volunteer Course Creation
Duolingo launched the Incubator, allowing bilingual volunteers to create language courses. This crowdsourced approach enabled courses in dozens of languages including Welsh, Hawaiian, Navajo, and other underserved languages that would have been commercially unviable.
Duolingo Raises $20M Series C
Duolingo raised $20 million in Series C funding led by Kleiner Caufield & Byers. The company was beginning to explore alternative revenue models as the crowdsourced translation business proved unsustainable.
Duolingo Test Center (Later the Duolingo English Test) Launches
Duolingo launched Test Center, an online English proficiency certification, on July 23, 2014. The certificate was initially free, with Duolingo planning to charge $20 once more universities and companies accepted it, far below the $200+ cost of TOEFL and IELTS. It became the Duolingo English Test, Duolingo's first move beyond free language learning into paid services; the price was later raised (it was $49 by 2019).
Crowdsourced Translation Model Abandoned
Duolingo abandoned its original crowdsourced translation revenue model, which had users translate real documents while learning. The company determined that scaling B2B translation services would distract from product development, pivoting toward advertising and the English Test for revenue.
Duolingo for Schools Launches as a Free Teacher Dashboard
Duolingo launched Duolingo for Schools, a free service that let teachers assign Duolingo as homework and track students' progress through a central dashboard. The governments of Costa Rica and Guatemala were already running pilots in public schools.
Duolingo Raises $45M Series D from Google Capital
Duolingo raised $45 million in Series D funding led by Google Capital (later CapitalG). This was the largest funding round to date, signaling growing investor confidence and raising expectations for monetization.
Duolingo Introduces Advertising to Free Users
Duolingo began showing ads to free users, served through a Google AdMob partnership that Campaign reports dates to 2015; by the April 2017 launch of Duolingo Plus, ads were part of the free experience. Ads appear after lessons, creating a new revenue stream but also introducing friction to the free product.
Achievement Badges System Launches
Duolingo added an achievements system of badges (such as Wildfire for long streaks and Sharpshooter for mistake-free lessons) that tracked daily metrics and long-term progress, adding another non-portable gamification layer that deepened user investment in the platform. The system already existed when Jorge Mazal joined in late 2017 and was redesigned at Duocon 2023.
Duolingo Plus Premium Subscription Launches at $9.99/Month
Duolingo launched Duolingo Plus, its first premium subscription tier, at $9.99 per month. The subscription offered ad-free lessons and offline downloads. Duolingo emphasized that free lessons would remain available, but this marked the beginning of tiered monetization.
Hearts/Health System Introduced for Free Users
Duolingo introduced the Health system (later renamed Hearts), giving free users a limited number of hearts that depleted with incorrect answers. When hearts ran out, users had to wait or watch ads to continue, creating the first significant paywall-like mechanic on the platform.
Duolingo Raises $25M Series E from Drive Capital
Duolingo raised $25 million in Series E funding led by Drive Capital. The company was now focused on subscription and advertising revenue models, with the crowdsourced translation model fully abandoned.
Duolingo Builds Internal A/B Testing Platform
Duolingo built and launched its internal experimentation tool, enabling hundreds of simultaneous A/B tests across platforms. This infrastructure became the foundation for the company's data-driven product decisions, enabling rapid iteration but also opaque user experience changes.
COPPA Study Flags Duolingo Among Apps Improperly Tracking Children
A study by seven researchers analyzing 5,855 children's apps found that Duolingo was among 1,100 apps sending improper persistent identifiers to third parties. Duolingo's spokesman responded that Duolingo is 'an online service directed at a general audience,' indicating the company did not consider itself subject to COPPA.
Leaderboards and Leagues System Introduced
Duolingo introduced weekly leaderboards with leagues, in which users are promoted or demoted based on weekly XP (first tested in 2018, per Duolingo). Former head of product Jorge Mazal wrote that leaderboards raised overall learning time 17% and tripled the number of highly engaged learners, but the system also introduced competitive pressure unrelated to learning.
Revised Duolingo English Test Launches; Academic Review Flags Cheating Risk
Duolingo launched a revised version of its English Test in July 2019, priced at $49. A 2020 critical review in Language Assessment Quarterly praised its accessibility (cheap, at-home, under an hour) but found its tasks had little in common with university language use, that it was susceptible to cheating and test preparation, and that its scores could not be recommended for university admissions.
Streak-Saver Notifications Become Core Growth Lever
Duolingo's streak-saver notification, alerting users with active streaks that they were about to lose their progress, proved to be a major retention driver. Combined with calendar views, animations, and streak freeze monetization, streak optimizations drove substantial improvements in daily active users.
Duolingo Reaches Unicorn Status with $30M Series F
Duolingo raised $30 million from Alphabet's CapitalG at a $1.5 billion valuation, becoming Pittsburgh's first tech unicorn. The company had 30 million monthly active users and was generating revenue primarily from subscriptions and advertising.
Birdbrain Machine Learning System Deployed
Duolingo began using Birdbrain, an in-house machine learning model that estimates learner proficiency and exercise difficulty, to personalize lessons in March 2020 (announced on its blog in October 2020, when it personalized over 20% of lessons). While improving learning outcomes, the system operates opaquely, with users having no visibility into how it determines their progression.
COVID-19 Pandemic Drives 30 Million New Learners in Weeks After Lockdowns
Between the WHO's pandemic declaration on March 11 and April 30, 2020, 30 million new learners joined Duolingo, 67% more than the same period in 2019. New user sign-ups rose 101% over March 2020 alone. By December 2020 Duolingo reported around 40 million monthly active users.
Duolingo English Test Adoption Surges as TOEFL Centers Close
The COVID-19 pandemic closed TOEFL and IELTS test centers globally, driving universities to accept the at-home Duolingo English Test. By November 2020, test-takers had grown 1,500% year over year and more than 2,500 higher-education institutions, including Yale and Duke, accepted the test.
Duolingo Raises $10M Series G at $1.65B Valuation
Duolingo raised $10 million from General Atlantic at a $1.65 billion valuation, capitalizing on the pandemic-driven surge in language learning. Revenue grew 129% year-over-year from $70.8 million in 2019 to $161.7 million in 2020.
Hearts System Expanded to More Free Users
Duolingo confirmed that many users had recently noticed the addition of Hearts to the app, describing them as a way of balancing practice and new material. Free users were limited to five mistakes before needing to wait, watch an ad, or complete a practice session to continue.
Duolingo Raises $35M Series H at $2.4B Valuation
Duolingo raised $35 million from Durable Capital Partners and General Atlantic at a $2.4 billion valuation. This was the final private funding round before the company's IPO, bringing total funding to $183 million.
Volunteer Contributor Program Ended
Duolingo announced the end of its volunteer contributor program, transitioning to paid professional linguists for course development. The company created a $4 million Duolingo Language Impact award fund distributed among the volunteer community. Some contributors were offered part-time Course Specialist positions.
Duolingo Files S-1 Revealing Dual-Class Share Structure
Duolingo's IPO filings revealed a dual-class share structure with Class B shares carrying 20 votes each versus 1 for Class A. Class B holders would hold about 97.8% of voting power after the offering, with directors, executive officers and 5% holders controlling about 91.5%, effectively insulating management from shareholder oversight.
Duolingo IPO at $6.5B Valuation on NASDAQ
Duolingo went public on NASDAQ under ticker DUOL, pricing shares at $102 and opening at $141.40. The company raised $521 million with a market cap of nearly $5 billion at close. Shares finished up 36% on the first day at $139.01.
Academic Study Documents Gamification Causing Anxiety and Self-Recrimination
A peer-reviewed study at L@S '22 analyzed nine years of Duolingo forum data and interviewed 15 users, finding that gamification mechanics caused 'apprehension,' 'self-recrimination,' and competitive anxiety. Users reported difficulty focusing on learning due to league pressure and streak stress.
Community Forums Permanently Shut Down
Duolingo permanently removed its community forums, where learners had discussed lessons, shared tips, and helped each other for about a decade. All forum posts became inaccessible from March 22, 2022; Sentence Discussions were kept read-only. Users were told to copy favorite content or download their own post data through the Duolingo Data Vault.
Duolingo Plus Rebranded to Super Duolingo
Duolingo rebranded its premium subscription from Duolingo Plus to Super Duolingo with a new visual identity. Core features and pricing remained unchanged, but the rebrand signaled increasing focus on premium positioning and subscriber conversion.
Path Redesign Replaces Flexible Skill Tree with Linear Path
Duolingo replaced the flexible skill tree, which let users choose which topics to study, with a rigid linear path. The redesign prompted widespread backlash, including a Change.org petition with 15,000 signatures demanding the old tree be restored or made optional.
Duolingo Makes First Acquisition: Animation Studio Gunner for $4.5M
Duolingo acquired Detroit-based animation studio Gunner for $4.5 million, its first official acquisition. Gunner had been an animation partner since 2020. The acquisition added 15 designers, illustrators, and animators to build out Duolingo's character-driven brand.
Scraped Data of 2.6M Users Listed for Sale on Hacking Forum
Data scraped from 2.6 million Duolingo users through an improperly secured API was listed for sale on the Breached hacking forum for $1,500. The exposed data included email addresses, names, languages studied, and XP. Duolingo initially downplayed the incident as involving 'publicly available profile information.'
Duolingo Max Tier Launches with GPT-4 at $29.99/Month
Duolingo launched Max, a premium tier powered by OpenAI's GPT-4, at $29.99/month ($167.99/year). The tier added AI features like Roleplay and Explain My Answer that were locked behind a paywall above the existing Super subscription, creating an additional monetization layer even for paying subscribers.
Full 2.6M User Dataset Released Publicly for $2.13
The complete dataset of 2.6 million scraped Duolingo user records was released on a new version of the Breached hacking forum for just 8 site credits ($2.13). The API vulnerability had been known since March 2023. Duolingo eventually implemented rate limits on the affected endpoint.
Duocon 2023 Announces Math and Music Expansion
At Duocon 2023, Duolingo announced its expansion into Math and Music courses alongside language learning. The multi-subject strategy signaled Duolingo's ambition to become a general education platform, leveraging its user base to enter adjacent markets.
Math and Music Courses Launch on Flagship App
Duolingo launched its Math and Music courses on the flagship iOS app, with Android following later. This marked the first time Duolingo offered non-language content on its main platform, expanding into areas where smaller competitors like Khan Academy and Yousician already operated.
Duolingo Cuts 10% of Contractors, Replaces with AI
Duolingo confirmed it cut about 10% of its contractor workforce at the end of 2023 (reported as over 100 writers, translators, and curriculum experts), as it turned to AI models like GPT-4 for content and translations. The company said GPT was used to translate sentences, with human experts validating output quality. Contractors reported receiving little notice about terminations.
Duolingo Acquires Animation Studio Hobbes
Duolingo acquired Hobbes, a Detroit-based motion design studio, its second acquisition after Gunner. The deal added 12 motion designers, animators, and creative strategists, nearly doubling the Detroit office. Hobbes had been a design partner supporting Duolingo Music and product architecture.
Friend Streak Adds Shared Streaks With Up to Five Friends
Duolingo launched Friend Streak, letting learners keep a separate shared daily streak with each of up to five friends and nudge friends who had not yet done a lesson. Duolingo said nearly 8 million learners had streaks of 365 days or more and that learners with a shared streak were 22% more likely to complete their daily lesson.
Duocon 2024 Announces AI-Powered Video Call and Adventures
At Duocon 2024, Duolingo announced Video Call, allowing Max subscribers to have AI-powered conversations with the character Lily, and Adventures, a game-like exploration feature where learners practice real-world scenarios. Video Call was locked behind the $29.99/month Max tier.
Second Round of Contractor Cuts as AI Replaces Content Writers
According to journalist Brian Merchant, citing a former contractor, Duolingo conducted a second round of contractor cuts in October 2024, this time targeting writers after the earlier translator cuts. The two rounds together represented a systematic replacement of the human content creation workforce with AI-generated material.
Viral 'Death of Duo' Marketing Campaign Generates 1.7B Impressions
Duolingo staged the 'death' of its owl mascot Duo, announced on February 11, 2025, and later revealed to have been caused by a Cybertruck. The campaign generated 1.7 billion social media impressions in two weeks; Duolingo's market research found twice as much social conversation about Duo's demise as about any of the top 10 2025 Super Bowl ads.
Chess Course Launches, Expanding Into Third Non-Language Subject
Duolingo launched a Chess course on iOS, its third non-language subject after Math and Music. The puzzle-based format attracted millions of daily learners, with a Player-versus-Player mode added later. The expansion continued Duolingo's strategy of leveraging its massive user base into adjacent education markets.
CEO's AI-First Memo Declares End of Contractor Workforce
CEO Luis von Ahn sent an all-hands email, also shared on LinkedIn, declaring Duolingo an 'AI-first company.' He wrote that the company would 'gradually stop using contractors to do work that AI can handle' and that 'headcount will only be given if a team cannot automate more of their work.' AI use would also be evaluated in hiring and performance reviews.
148 AI-Written Courses Launched, Doubling Content Library
Duolingo launched 148 new language courses created with generative AI, doubling its course offerings. CEO Luis von Ahn said the first 100 courses took about 12 years to develop, while nearly 150 were created in about a year. The launch made seven popular non-English languages available across all 28 UI languages.
Duolingo Stock Hits All-Time High of $544.93
Duolingo stock reached its all-time high of $544.93 on May 14, 2025, roughly 430% above its $102 IPO price. The surge was driven by strong subscriber growth, revenue increases, and market enthusiasm about the AI-first strategy before the backlash took hold.
Q1 2025: Surpasses 10 Million Paid Subscribers
Duolingo reported 10.3 million paid subscribers at the end of Q1 2025, a 40% increase year over year. Revenue grew 38% to $230.7 million. Daily active users reached 46.6 million, up 49%, and the company said it added more DAUs than in any previous quarter.
Duolingo Deletes All TikTok and Instagram Content After AI Backlash
Following widespread backlash to the AI-first memo, Duolingo deleted all content from its TikTok and Instagram accounts around May 17, 2025, replacing its bio with the cryptic 'gonefornow123.' The company lost over 400,000 TikTok followers in the backlash, and users posted about deleting the app and giving up years-long streaks.
Duolingo Returns to Social Media With Cryptic Masked-Figure Video
After days of silence, Duolingo posted a video on TikTok and Instagram featuring a masked figure complaining about 'corporate overlords' and saying everything crashed down 'after one single post about AI.' Fast Company argued the stunt could not address the underlying backlash, which was about the company's AI policies rather than a single post.
Energy System Replaces Hearts, Limiting Even Correct Answers
Duolingo began replacing the hearts system with an energy system, at first for a small number of users and then rolling out gradually. Free users get 25 energy, which is used up by every exercise, including correct answers, with some energy earned back for streaks of correct answers. Users reported running out during their third lesson even without mistakes, limiting free users more aggressively than the previous hearts system that only punished mistakes.
Duolingo Acquires NextBeat Music Gaming Studio for $34.5M
Duolingo acquired the team from NextBeat, a London-based music gaming startup, for $34.5 million. The acquisition brought 23 specialists in game design, user retention, monetization, sound design and music licensing to enhance the Music course and opened a London office.
Duolingo Tells Investors Energy Lifts Subscriber Conversion
In its Q2 2025 shareholder letter Duolingo described Energy, the usage-based pacing system replacing Hearts for free users, as designed to boost engagement and conversion, and said its iOS rollout had increased DAUs, time spent learning and subscriber conversion. Revenue per paid subscriber rose 6% as more subscribers moved to higher-priced tiers.
CEO Admits AI Memo 'Did Not Give Enough Context'
In a New York Times interview, CEO Luis von Ahn said of the AI-first memo, 'This was on me. I did not give enough context,' and insisted, 'We've never laid off any full-time employees. We don't plan to.' He had earlier told the Financial Times, 'I did not expect the amount of blowback.' He maintained the distinction between full-time staff and contractors, saying the contractor force goes up and down with needs.
Duolingo Ads Platform Launches at Advertising Week New York
Duolingo launched its in-house advertising platform 'Duolingo Ads' at Advertising Week New York, offering brands character-led ad formats. Launch partners including Adobe, Universal Pictures, Marriott Bonvoy, and Intrepid Travel had been testing since May. Duolingo said two-thirds of launch partners saw promising results, with click-through rates up about 3% and completion rates as high as 94% for rewarded videos.
Class Central Reports Free-User Backlash Over Energy System
Class Central reported that Energy, which decreases with every right answer, drew mostly negative user reviews; its writer went from 6-7 lessons a day under Hearts to 3-4 under Energy and would need 4-5 ads to get 20-25 more Energy points. Users called the system a 'punishment' for answering correctly or not subscribing.
Q3 2025: Surpasses 50 Million Daily Active Users
Duolingo reported surpassing 50 million daily active users in Q3 2025, with DAU growing 36% and revenue growing 41% year over year. DAU growth was decelerating from the 51% seen in Q4 2024; the CEO had said the AI-first backlash pushed DAU growth to the low end of expectations.
Stock Falls 25% as Duolingo Shifts Toward User Growth
Duolingo shares fell 25%, their worst day on record, after soft Q4 2025 guidance. CEO Luis von Ahn told CNBC the company had been shifting the trade-off between monetization and user growth 'much more towards user growth' and investing more in long-term initiatives.
Explain My Answer Made Free Again
In January 2026 Duolingo made Explain My Answer, a GPT-powered grammar explanation that had been moved behind the Max paywall, free for all learners again.
$400M Stock Buyback Authorized Alongside Disappointing 2026 Guidance
Duolingo reported full-year 2025 revenue of $1.04 billion (+39%) and authorized a $400 million stock buyback program. However, 2026 guidance of $1.20-1.22B revenue (15-18% growth) disappointed investors, reflecting a deliberate strategy to slow monetization and reduce free-tier friction. The stock dropped 14% the following day.
Duolingo Pledges $50M+ in Foregone Bookings to Cut Free-Tier Friction
Duolingo's Q4 2025 shareholder letter said adding friction such as higher ad load and subscription upsells had been its main way to raise bookings per user and was partly why DAU growth slowed. It said it would invest more than $50 million of foregone bookings in the free experience, move Video Call from Max into Super, let learners answer most exercises by voice, add free AI Speaking Adventures, and repurpose part of its monetization team to user growth.
Stock Drops 25% in February as Market Reassesses Growth Trajectory
Duolingo stock fell 25% in February 2026 after the company projected slower bookings growth and reduced profitability to prioritize user expansion. The company announced plans to invest $50 million in foregone bookings to reduce free-tier friction and target 100 million daily active users by 2028.
CEO Drops AI Use From Employee Performance Reviews
CEO Luis von Ahn said Duolingo had backtracked on evaluating employees' AI use in performance reviews, a policy from the April 2025 AI-first memo, after staff asked whether they were being told to use AI for its own sake. He said other constraints from the memo, including not using contractors for work AI can do, remain.
Duolingo for Schools to Shut Down on July 31, 2027
Duolingo emailed teachers that Duolingo for Schools, its free classroom dashboard launched in 2015, would end on July 31, 2027 because the teacher-facing tools had not seen enough use. No new Schools accounts or classrooms can be created; teachers had already lost the ability to assign specific lessons in 2024, when assignments were limited to XP targets.
Free Tier Gets Fewer Ads and Longer Trials
Reporting on Q1 2026, Class Central found Duolingo had cut ads from two per session to one and was testing one-month free trials, with staff seeing more Energy and fewer ads. Daily active users grew 21% to 56.5 million, while paid subscribers grew by only about 300,000 in the quarter.
Pre-Lesson Sponsored Video Unlocks 30 Minutes of Energy
Duolingo announced Pre-Lesson Energy Sponsorship, an opt-in 30-second video ad shown at the start of a free user's first daily lesson that unlocks 30 minutes of unlimited Energy, piloting with Etsy and Universal Pictures. Its head of ad sales said Duolingo had never before shown an ad before a lesson.
Video Call Reaches Most New Super Subscribers
Duolingo's Q2 2026 letter said most new Super subscribers now had Video Call, the AI conversation feature previously limited to Max, with existing Super subscribers to follow later in the year. It said monetization work now focused on raising revenue without adding friction for free users, for example longer free trials.
Ad-Supported 'Lite' Plan Tested on Learners Unlikely to Buy Super
On its Q2 2026 call Duolingo described testing a cheaper ad-supported plan, Lite, with double Energy that refills faster, aimed at users it predicts will not buy Super. Class Central found plan names and prices varying between screens in its own tests (Lite at $35.99 a year), and reported the company ships an app version every week with around 350 changes.
Max Tier No Longer Offered to New Subscribers
The Motley Fool found that new sign-ups were offered only Super, Super Family and Super Lite, with Max's AI features such as Video Call included in Super. CEO Luis von Ahn had said on the Q2 call that Duolingo 'may actually sunset Max'.
Evidence (45 citations)
D1: User Value Erosion
D2: Business Customer Exploitation
D3: Shareholder Extraction
D4: Lock-in & Switching Costs
D5: Twiddling & Algorithmic Opacity
D6: Dark Patterns
D7: Advertising & Monetization Pressure
D8: Competitive Conduct
D9: Labor & Governance
D10: Regulatory & Legal Posture
Scoring Log (7 entries)
Checked 108 items (61 timeline, 40 evidence, 5 milestones, 2 alternatives) + prose. 45 verified, 32 corrected (14 date-only), 26 re-sourced, 5 removed (3 junk sources, 1 dead duplicate, 1 irrelevant). Invented (contradicted): TikTok '10.3M followers' (Nation.Cymru: 16.7M); '20,000 A/B tests at any time' (Duolingo blog: a few hundred); stock '600%+' gain (actual ~434%); Q1 2025 DAU growth '40%' (shareholder letter: 49%). Also fixed: DET launched free/$20 not $49; Birdbrain 2020 not 2018; 97.8% is Class B not insiders; Nov 2020 hearts item carried a 2025 quote; NYT vs FT attribution; Super Bowl comparison.
52->41. Since Feb 2026: Q4 2025 letter (Feb 26) rolled back free-tier friction (>$50M foregone bookings, Video Call to Super, free AI speaking) and authorized a $400M buyback ($71.9M spent by Aug 1); Explain My Answer free (Jan); CEO dropped AI use from reviews (Apr); Schools sunset for Jul 2027 announced (Apr); ads per session cut 2->1 and longer trials (Q1); pre-lesson Energy sponsorship ads (Jun); ad-supported Lite plan tested and Max dropped for new subscribers (Aug-Sep). D1 7->5 (event: 2026 friction rollback; the fact audit also removed the review-share stat), D3 5->4 (event: user growth over margin, buyback offsets dilution), D7 6->5 (event: fewer ads, Max features moved down), D6 7->6 (correction: guilt-message stat removed, cancellation claim narrowed to standard app-store flow), D2 3->2 (recalibration: small business side, contractors scored in D9), D4 5->4 (recalibration: behavioral lock-in, easy deletion, viable rivals), D8 4->3 (recalibration: studio acqui-hires, no API/legal conduct), D9 6->5 (recalibration: no FT layoffs, 2.6:1 pay ratio, dual-class and contractor cuts remain), D10 4->2 (recalibration: zero LDA filings, no enforcement; old score rested on speculation). D5 unchanged. Eras: all 8 re-dated to inflections (2012-06-01->2011-11-30 beta; 2014-07-01->2014-07-23 Test Center; 2017-07-01->2017-04-21 Plus; 2019-10-01->2018-10-01 leagues; 2021-08-01->2021-07-28 IPO; 2023-03-01->2022-10-01 path redesign; 2025-07-01->2025-04-28 AI-first memo; 2026-02-10->2026-02-26 Q4 letter). Relabeled 'Translation Pivot'->'English Test & Ads', 'Max Tier & AI Pivot'->'Path Redesign & Max', 'Energy System Backlash'->'AI-First Backlash', 'AI-First Extraction'->'Friction Rollback'. Split 'Path Redesign & Max' at 2024-01-08 (contractor cuts) -> 'AI Content Shift'. Note: Q2 2026 10-Q accrued ~$5M for an unspecified proposed legal settlement (nature undisclosed; not added). Securities-fraud 'investigations' by plaintiff firms (Mar 2026) not added: no filed case found.
No material changes since 2026-02-10. Checked news, pricing, regulatory/legal, labor, and energy-system developments through mid-2026: Feb 2026 Q4 results/22% stock drop and $400M buyback already in evidence; subsequent shareholder-firm securities investigations are investor-disclosure litigation that doesn't shift D10's regulatory-posture band; Super annual renewal rose ~14% ($83.99 to $95.99, below materiality); von Ahn walked back AI-first performance metric with continued FT hiring (mild D9 positive, still in band with dual-class and contractor history); energy-system backlash continues as an existing trend. Explain My Answer made free (Jan 2026) predates baseline. No dimension band moves.
Added 1 missing dimension narrative