Duolingo's revenue and user base are climbing, but a major Wall Street downgrade highlights concerns about whether the company's premium stock price is justified by sustainable growth or just short-term promotions
Duolingo's latest quarterly results delivered strong evidence that its user base is expanding rapidly, but the company's high valuation is drawing skepticism from some on Wall Street. For the second quarter, Duolingo reported revenue of $298.5 million, up 18% from the same period last year. Total bookings-a key measure of future revenue-rose 8% to $289.1 million. Daily active users climbed 23% to 58.7 million, and paid subscribers increased 17% to 12.7 million, according to the company's earnings release.
Management reaffirmed its full-year outlook, projecting 10% to 12% bookings growth and 15% to 18% revenue growth for 2026. The company also raised its adjusted EBITDA margin target to about 26.5%, signaling confidence in its profitability trajectory. These results arrived just after Bank of America issued a downgrade on Duolingo's stock, shifting its rating to Underperform from Neutral and lowering its price target to $93-about 31% below the share price at the time of the note.
Short-Term Boost or Lasting Momentum?
Bank of America's caution centers on whether Duolingo's recent user growth is sustainable or driven by temporary factors. The firm noted that monthly active users (MAUs) jumped 6% in June after a modest 3% gain in May and a 2% decline in April. However, analysts questioned whether this acceleration was the result of lasting product improvements or short-lived promotions. Specifically, Bank of America pointed to a June campaign with Airbnb that offered a free month of Super Duolingo without requiring a credit card, suggesting this may have artificially inflated user numbers.
Duolingo's management, for its part, attributed the second-quarter user surge to a mix of product changes, marketing, and a one-time Streak Revival event. This campaign allowed users to restore their longest-ever streak by completing three lessons, drawing participation from 15.4 million learners-nearly 8 million of whom had no active streak at the start. While this supports the idea that special events can drive engagement, it also raises questions about how much of the growth is repeatable.
The company reported that its current-user retention rate reached a record 84%, up about one percentage point from a year earlier. Management expects daily active user growth to remain above 20% for the rest of 2026, citing ongoing product improvements and marketing as drivers of more durable engagement.
Valuation Premium Under Scrutiny
Despite Duolingo's operational momentum, Bank of America argues that the stock's valuation is difficult to justify without greater confidence in long-term growth. The firm estimates Duolingo is trading at roughly 16 times its projected 2027 EBITDA, compared to about 10 times for similar mid-cap subscription companies. Bank of America also trimmed its 2027 bookings growth forecast to 9% from 11% and lowered its EBITDA estimate for that year to $338 million from $388 million, reflecting a more cautious outlook.
For the third quarter, Duolingo guided to $307 million in bookings, representing about 8.9% year-over-year growth-closely matching Bank of America's own estimate. But the gap between management's optimism and analyst skepticism widens further out, especially as Duolingo invests in AI-powered features like Video Call and aims to create a more conversational learning experience. Bank of America remains unconvinced that these innovations will deliver the growth needed to support the current premium valuation.
For investors, the latest earnings report reinforces Duolingo's near-term growth story, but the debate over whether that growth is sustainable-and worth the price-remains unresolved. This tension between strong user metrics and valuation concerns echoes the challenges faced by other high-growth tech companies, as seen when Palantir's rapid expansion tested investor confidence after a surge in earnings.
According to company filings, Duolingo's second-quarter performance outpaced consensus estimates for revenue but fell short of some bullish analyst forecasts for bookings. The company's ability to maintain high retention rates and convert free users to paid subscribers will be critical as it seeks to justify its valuation in a competitive market for language-learning apps.
Valuation is a central issue for growth stocks like Duolingo. A company's price-to-earnings or price-to-EBITDA ratio reflects how much investors are willing to pay for each dollar of profit or cash flow. When a stock trades at a significant premium to peers, it signals high expectations for future growth-but also exposes investors to greater downside if that growth slows or proves temporary. For companies relying on user engagement and subscription models, the durability of growth drivers-such as product innovation versus one-time promotions-can make the difference between a justified premium and a valuation reset.
