Why I think Duolingo is a good buy

I’ve been digging into Duolingo lately and the more I look at it, the more it starts to feel like one of those stealth compounders that people ignore until it’s already doubled. Revenue has now grown for **8 straight quarters**, and the YoY growth rate has been holding in the **30%–40%** range rather than collapsing like many pandemic-era consumer apps. Gross profit is rising nearly in line with revenue and gross margin has stayed above **50%** in recent quarters, which tells me they aren’t buying growth through heavy promotions or margin cuts. When I pulled up the income statement chart on moomoo, the YoY line basically stays elevated each quarter while the revenue bars keep climbing. Another thing that stood out is how efficiently they’re scaling. Operating expenses are increasing, but revenue is growing much faster. Over the last **6 quarters**, operating loss has been shrinking consistently and the curve toward profitability is pretty obvious. If they maintain anything close to their recent margin trajectory, hitting consistent profit doesn’t look far off. On the qualitative side, user engagement feels much stronger than a few years ago. DAU has been growing faster than MAU according to their recent disclosures, which usually implies rising stickiness. Friends are using it to prep for travel, coworkers compete on streaks, and even my parents mess around with lessons now. Language learning used to be a niche habit, but Duolingo has turned it into a daily-use product. For a subscription business, retention and habit-building are everything, and they seem to be nailing both. The stock has pulled back from its highs and that’s what pushed me to dig deeper. With fundamentals trending up, margins improving quarter after quarter, and more evidence that the product is becoming culturally entrenched, the current dip is starting to look like a potentially reasonable entry point instead of a warning sign. Definitely curious to hear other perspectives, especially from anyone who has dug into unit economics, paid conversion rates, or DAU/MAU efficiency in more detail.