Duolingo (NASDAQ: DUOL) operates the world’s largest digital language-education platform. Unfortunately, that hasn’t kept its stock from plummeting by 82% from its mid-2025 all-time high. The drop is primarily tied to two reasons:
-
Investors are worried that artificial intelligence (AI) will disrupt its business.
-
Management plans to target faster user growth, which is likely to affect sales and profits.
I think those concerns are overwrought. Regarding the first issue, Duolingo has actually proven that AI can be a tailwind for its business, rather than a serious threat. As for the second, while the shift in its business strategy could temporarily result in slower revenue and earnings growth, the company believes it can almost double its daily active users (DAUs) between now and 2028.
Will AI create the world’s first trillionaire? Our team just released a report on the one little-known company, called an “Indispensable Monopoly” providing the critical technology Nvidia and Intel both need. Continue »
If I’m right, the sharp decline in Duolingo stock presents a great long-term buying opportunity, especially because the stock is trading at the cheapest valuations it has ever been since going public in 2021.
Duolingo takes a mobile-first approach to education, so it can provide interactive and highly engaging lessons to anybody with a smartphone or tablet computer. Its platform had 52.7 million DAUs at the end of 2025, which was a 30% increase from the year-ago period, so its strategy is clearly resonating.
The company monetizes its platform by showing ads to free users, and by offering a series of subscription options for eager learners who want to accelerate their progress by unlocking extra features. A record 12.2 million users were paying for a subscription at the end of 2025, a figure that was up 28% year over year.
AI has been a major drawing card for subscribers. In 2024, Duolingo launched a feature called Video Call, which enables users to practice their foreign-language speaking skills with a digital avatar named Lily, and it’s only available to users who pay for Super Duolingo or Duolingo Max subscriptions.
Subscribers who choose the more expensive Max subscription option also gain access to other AI features like Roleplay, which challenges them to solve different problems through a chatbot-style interface to improve their conversational skills.
Duolingo plans to integrate AI into the free learning experience, too, as part of its broader goal to attract more users. Most free lessons are completed by typing or tapping answers, but the company wants to make spoken language a more prominent medium, which is only now possible thanks to AI.
In 2025, Duolingo generated a record $1.04 billion in revenue, a 39% increase from the prior year. The company also had a record year at the bottom line, producing $414.1 million in net income based on generally accepted accounting principles (GAAP), an amount that was up by an eye-popping 367%.
But as mentioned above, investors worry that those blistering growth rates are now on the chopping block as monetization becomes a secondary priority to user growth. Management believes investing more aggressively in acquiring users will lead to much better financial results in the long run, which makes sense because the platform will have more prospects to convert into paying subscribers. Plus, a larger user base will make Duolingo’s “position as the leading education app in the world” more defensible and harder to disrupt.
On a positive note, Duolingo is a capital-light business, and its soaring 2025 profit suggests it has plenty of room to invest more money in growth. In fact, the company spent just $125.7 million on marketing last year, a mere 20% of its total operating costs.
Boosting marketing spending would be a surefire way to supercharge user growth. By 2028, management believes Duolingo could be serving 100 million DAUs, which would be almost double the 52.7 million it serves today.
Following the 82% sell-off from last year’s all-time high, Duolingo stock has landed at a very attractive valuation. Its price-to-sales (P/S) ratio is now just 4.8, which is not only the cheapest level since going public, but also a whopping 70% discount to its average of 16.3.
Moreover, based on Duolingo’s 2025 earnings of $8.31 per share, its stock now trades at a price-to-earnings (P/E) ratio of just 12.1. For some perspective, that’s half the P/E of the S&P 500, which is 24.6 as I write this.
With that said, Duolingo’s earnings could take a hit during 2026 as part of management’s strategy shift, so its P/E might actually be higher later this year even if its stock doesn’t produce any upside. Wall Street’s consensus estimate (provided by Yahoo! Finance) suggests the company’s 2026 earnings will shrink to $7.23 per share, but that places its stock at a forward P/E of 13.9, which is still extremely attractive.
Although prospective shareholders might have to endure a period of slower revenue and earnings growth, they appear to be getting a fantastic price for Duolingo stock right now. If the company does reach 100 million DAUs by 2028, and investors look back on this moment, they might be very glad they bought the stock today.
Before you buy stock in Duolingo, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and Duolingo wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004… if you invested $1,000 at the time of our recommendation, you’d have $522,791!* Or when Nvidia made this list on April 15, 2005… if you invested $1,000 at the time of our recommendation, you’d have $1,132,678!*
Now, it’s worth noting Stock Advisor’s total average return is 952% — a market-crushing outperformance compared to 191% for the S&P 500. Don’t miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors.
*Stock Advisor returns as of March 11, 2026.
Anthony Di Pizio has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Duolingo. The Motley Fool has a disclosure policy.
1 Glorious Growth Stock, Down 81%, You Might Regret Not Buying on the Dip in March was originally published by The Motley Fool

















