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Duolingo’s Luis von Ahn Wants to Delete the Blockchain
Brief published April 2, 2026 · Original source published March 31, 2026
Original reporting by Katie Drummond at wired.com.
Automated brief. Verify important details at the original source.
Duolingo CEO Declares War on Blockchain While Green Owl Holds Nation's Spanish Skills Hostage
The man who gave the world both captchas and passive-aggressive push notifications about missed Spanish lessons has decided his next target should be the technology that powers digital money for people who think traditional finance isn't quite dystopian enough.
Luis von Ahn, CEO of Duolingo and the person most directly responsible for millions of people knowing how to say "the apple is red" in seventeen languages while still being unable to order coffee abroad, recently told Wired that he wants to "delete the blockchain." This announcement came during what we can only assume was a brief respite from coaching users through their 847th consecutive day of learning that "el gato" means "the cat"—a fact that will surely prove invaluable during their hypothetical business trip to Barcelona.
Von Ahn's blockchain beef isn't personal (though he did mention losing a crypto password, because of course he did). Instead, it's philosophical. The man who invented captchas—those delightful little puzzles that make you prove you're human by identifying traffic lights that look like they were photographed through a dirty windshield during a sandstorm—apparently thinks blockchain technology represents a fundamental waste of human potential. "It's just a distributed database," he said, with the casual dismissal of someone who has watched humanity collectively spend billions of hours clicking on pictures of crosswalks to prove they deserve to log into their email.
The irony here is thicker than the desperation in a "These notifications seem to be bothering you" email from Duolingo's servers. Von Ahn built his fortune on two technologies that, in their own ways, represent humanity's willingness to engage with arbitrary digital busywork. Captchas turned basic web interaction into an unpaid job where humans train AI systems by identifying street signs. Duolingo transformed language learning into a dopamine-driven habit loop where a cartoon owl judges your life choices if you dare to skip a day of conjugating irregular verbs.
But blockchain? That's apparently where von Ahn draws the line. While millions of people voluntarily subject themselves to guilt trips from a green bird mascot, he sees crypto as the real productivity killer. It's like a chain smoker complaining about vaping, except the chain smoker accidentally taught half the internet what a fire hydrant looks like and convinced an entire generation that they could become fluent in Italian by spending five minutes a day tapping on their phone.
The blockchain criticism comes from someone uniquely qualified to identify systems that extract value from human participation without necessarily improving their lives. Von Ahn co-founded reCAPTCHA, which Google acquired and used to digitize books by having users unknowingly transcribe text while proving they weren't robots. It was genius: turn security theater into crowdsourced data entry. Every time you clicked "I'm not a robot" and then identified chimneys in blurry photos, you were simultaneously protecting a website and training Google's image recognition systems. The company got free labor, websites got bot protection, and users got the satisfaction of accessing their accounts.
Duolingo operates on similar principles, gamifying education until the line between learning and addiction becomes as blurry as those captcha images. The app sends push notifications with the persistence of an ex-boyfriend and the emotional manipulation tactics of a disappointed parent. Miss a few lessons and the owl starts getting creative: "These reminders don't seem to be working. We'll stop sending them for now." It's psychological warfare disguised as language education, and it works precisely because it taps into the same behavioral patterns that make people refresh Twitter compulsively or check their crypto portfolios every five minutes.
Which brings us back to the blockchain critique. Von Ahn argues that distributed ledger technology represents a massive misallocation of human attention and computational resources. He's not wrong—the amount of energy spent mining Bitcoin could probably power a small country, and the collective brainpower devoted to DeFi yield farming could have cured at least three diseases by now. But this is coming from someone whose platform has convinced millions of people that they need to maintain a daily streak of vocabulary exercises or risk disappointing a judgment-prone animated bird.
The blockchain space has certainly earned its skepticism. Between the NFT bubble that convinced people to pay thousands of dollars for receipts pointing to JPEGs of bored apes, the collapse of exchanges run by people who apparently learned financial management from playing Monopoly, and the proliferation of meme coins that exist solely to transfer money from people who fear missing out to people who understand market timing, it's fair to say the technology has been more associated with speculation than revolution.
Yet von Ahn's position reveals something interesting about how we think about digital systems and human behavior. Both captchas and language learning apps succeed by making potentially tedious tasks feel purposeful or engaging. Captchas convinced us that identifying stop signs was a necessary part of internet citizenship. Duolingo convinced us that spending five minutes a day with an increasingly needy cartoon owl was the path to multilingual enlightenment. These systems work because they align with our existing behaviors and motivations, even if the alignment is somewhat artificial.
The real question isn't whether blockchain technology will survive von Ahn's theoretical deletion campaign, but whether the current generation of tech leaders will create systems that genuinely improve human capability or simply find more sophisticated ways to harvest attention. For all its faults, Duolingo does teach people actual words in actual languages, even if the delivery mechanism involves more psychological manipulation than most people would admit to enjoying.
Perhaps the most honest take is that von Ahn has simply reached the stage of his career where he can afford to be picky about which forms of digital busywork deserve to exist. Having made his fortune convincing humans to prove their humanity and then convincing them to maintain daily streaks with a passive-aggressive mascot, he's earned the right to declare other technologies excessive. It's the privilege of someone who won the attention economy lottery twice: he gets to complain about the game while still cashing the checks.