Duolingo Inc. (NASDAQ: DUOL) reported quarterly earnings that surpassed Wall Street expectations, yet the language-learning platform saw its shares tumble nearly 15% after issuing forward guidance that fell short of analyst forecasts. The sharp decline reflected investor concerns that near-term growth may moderate even as the company continues to expand its user base and improve profitability.
Fourth-Quarter Performance Exceeds Estimates
For the fourth quarter of 2025, Duolingo delivered revenue of $282.9 million, representing a 35% increase compared to the same period a year earlier. The figure came in slightly above the $275.9 million that analysts had been expecting. Earnings per share reached $0.91, comfortably topping consensus estimates of $0.78.
The company’s adjusted EBITDA came in at $84.35 million, surpassing the anticipated $78.24 million. Operating margin improved significantly, expanding to 15.4% from 6.6% in the fourth quarter of the prior year, underscoring the company’s progress in scaling efficiently.
User Growth and Subscriber Metrics Show Continued Momentum
Duolingo also reported robust growth across its key user metrics. Monthly active users reached 133.1 million, an increase of 16.4 million from the previous year. Daily active users rose 30% to 52.7 million, reflecting deepening engagement among the platform’s user base. Paid subscribers totaled 12.2 million, a 28% year-over-year increase, highlighting the continued success of Duolingo’s freemium model in converting casual users into paying customers.
Free cash flow margin improved to 33.1% from 28.5% in the prior quarter, while net income for the fourth quarter stood at $42 million.
In a statement accompanying the earnings release, Duolingo CEO Luis von Ahn highlighted the company’s operational achievements. “We closed 2025 with strong momentum, surpassing 50 million daily active users and generating more than $1 billion in bookings for the first time,” von Ahn said.
Guidance Miss Triggers Investor Caution
Despite the strong fourth-quarter results, investor sentiment soured following the company’s outlook for the coming periods. Duolingo’s revenue guidance for the first quarter of 2026 was set at a midpoint of $288.5 million, falling short of the $291.2 million that analysts had projected.
The full-year outlook proved even more disappointing. The company forecast adjusted EBITDA of $302 million for 2026, significantly below the $385 million anticipated by Wall Street. The substantial gap between expectations and guidance raised concerns that profitability growth may not keep pace with the company’s expanding user base, or that the company anticipates higher investments that could compress near-term margins.
Balancing Growth and Profitability
The sharp post-earnings sell-off underscores the delicate balance Duolingo faces as it continues to scale. While the company has demonstrated an ability to grow revenue, expand margins, and increase free cash flow, the guidance miss suggests that the pace of profitability improvement may moderate in the year ahead. Investors will likely be watching closely for further commentary on the drivers behind the softer EBITDA forecast, including any planned increases in marketing spend, product development investments, or shifts in user acquisition costs.
As Duolingo moves into 2026, the company remains well-positioned with a large and engaged user base, a growing paid subscriber cohort, and a proven business model. However, the disconnect between strong historical results and cautious forward guidance has introduced a note of uncertainty, prompting investors to reassess near-term expectations for the language-learning platform.