Duolingo (DUOL) Concealed Monetization Push and User Growth Slowdown Case
$DUOL investors filed a claim against Duolingo, its CEO, and its former CFO for touting sustainable daily active user (DAU) and bookings growth, while failing to disclose that an aggressive monetization push, heavy ads, added friction, and lower-quality AI content were slowing DAU growth.
After Duolingo reported a further drop in DAU growth and said it would prioritize user growth over monetization, its stock fell 25% on November 6, 2025, from $260.02 to $193.74 per share. It fell a further 8.5% on January 12, 2026, to $161.74, and 14% on February 27, 2026, to $101.
$DUOL investors can join this case to be notified about potential recovery.
Case Details:
Duolingo operates a freemium language-learning app and generates revenue from subscriptions (Super and Max), ads, and in-app purchases. DAU growth is the Company’s most important metric, according to CEO Luis von Ahn. During the Class Period, Defendants touted record DAU growth, strong bookings, and high-quality AI-powered learning. They attributed a slowdown in DAU growth after the Company’s April 2025 “AI-first” announcement to backlash that was “in the past.”
Duolingo was pushing monetization through heavy ads, aggressive upsells, a new “Energy” system that added friction for free users, and rapidly generated AI content of lower quality. This slowed DAU growth. On November 5, 2025, Duolingo reported DAU growth of 36%, down from 49% in the first quarter of 2025, and said it would prioritize user growth over monetization. It described the impact as “small.” On January 12, 2026, it announced CFO Matthew Skaruppa’s resignation and preliminary fourth-quarter DAU growth of only 30%.
On February 26, 2026, it forecast 2026 DAU growth of just 20%, with lower bookings and profitability, and von Ahn acknowledged that the Company had deliberately introduced “friction” into the free experience.
Based on these events, $DUOL investors filed a claim against Duolingo, Inc., alleging the Company:
Failed to disclose that its monetization push, including heavy ads and added friction for free users, was slowing DAU growth
Failed to disclose that rapidly generated, lower-quality AI content was degrading the user experience
Misrepresented the sustainability of its DAU and bookings growth
Understated the financial impact of its shift toward user growth
Investors argue that had the truth about the effects of Duolingo’s monetization strategy been disclosed, its stock would not have traded at artificially inflated prices during the Class Period.