Duolingo’s CEO Just Called Blockchain Useless—Here’s Why It Matters

Luis von Ahn didn’t just criticize blockchain—he called for its eradication. The Duolingo co-founder and CEO told Wired the technology is a ‘complete waste of time’ for practical applications, explicitly separating his stance from personal crypto mishaps (like losing a Bitcoin password years ago). His target isn’t speculative assets but the infrastructure itself: a rare public rejection from a tech leader whose product serves 500 million users without a single blockchain dependency.

This isn’t abstract skepticism. Von Ahn’s dismissal lands in a sector where blockchain’s promises—decentralized identity, tokenized learning—have repeatedly failed to materialize. Edtech’s core problems (engagement, accessibility, assessment) don’t require distributed ledgers; they require better UX and scalable pedagogy. His critique mirrors a quieter industry shift: even crypto-adjacent firms like Coinbase are pivoting toward ‘real utility’ after years of speculative hype.

The timing stings for blockchain advocates. With Ethereum’s gas fees still volatile and NFT-based education projects collapsing, von Ahn’s rejection isn’t just one executive’s opinion—it’s a stress test for the technology’s remaining use cases outside finance.

For users, the signal is clear: blockchain’s absence isn’t a flaw—it’s a feature. Duolingo’s growth proves language learning doesn’t need tokens or smart contracts; it needs adaptive algorithms and behavioral design. The contrast with blockchain-heavy platforms like Bitdegree (which gamifies courses with crypto rewards) is stark: while Bitdegree struggles with adoption, Duolingo’s $250M annual revenue comes from subscriptions and ads, not speculative tech.

The backlash was predictable. Crypto Twitter labeled von Ahn a ‘Luddite’, while DeFi educators argued he ‘doesn’t understand the space.’ But the real tension isn’t ideological—it’s about opportunity cost. Every hour spent integrating blockchain is an hour not spent improving core products. Andreessen Horowitz’s 2023 report admitted as much: ‘Most consumer apps don’t need a chain.’

Von Ahn’s stance may accelerate a reckoning. If a CEO with his credibility calls blockchain ‘a solution in search of a problem,’ investors and builders face a harder question: What’s left when the hype deflates? The answer isn’t in whitepapers—it’s in whether users notice (or care) when the tech disappears.