Duolingo shares peaked with a 67% gain in mid-May 2025 before closing the year down 46%, reflecting a sharp reversal despite the company reporting record topline growth. The downturn accelerated in the second half of the year as investors grew cautious about the impact of new AI language platforms and the company’s decision to prioritize rapid user acquisition over near-term profitability.

In Q3 2025, Duolingo delivered a 41% year-over-year increase in revenue and a 33% jump in bookings, while daily active users rose 36%, underscoring strong engagement and platform stickiness. The company ended the year with a modest price-to-earnings ratio of 22.3 and held cash reserves exceeding $300 million, giving it ample runway to fund product development and marketing initiatives.

Management has shifted focus from margin expansion to subsidized subscriptions designed to lower the entry barrier for new learners, a move that pressured operating margins but bolstered gross subscriber additions by over 20% during the period. Investor concern has centered on emerging AI-driven language tools from major tech firms, which analysts warn could challenge Duolingo’s differentiated gamification approach if left unaddressed.

Despite the steep pullback, consensus models suggest the stock remains underappreciated given its projected compound annual revenue growth of 35% through 2027 and an expanding addressable market in non-English language learning. With a current enterprise value near $7.5 billion and growing monetization opportunities in AI-powered personalized lessons, many investors view the downturn as an opportunity to accumulate shares for potential upside as new growth engines gain traction.