United StatesEducation2024 – ongoingDuolingo
AI-generated language courses and the AI-first strategy
Duolingo launched 148 AI-built language courses in about a year, after its first 100 had taken about 12 years
Problem
Building a new Duolingo language course from scratch took a small team years, so the company had taken about 12 years to reach its first 100 courses. Speakers of many languages, particularly in Asia and Latin America, had few courses to choose from.
Approach
Duolingo used generative AI to create and check course content, together with a "shared content" system that builds one high-quality base course and adapts it to dozens of interface languages. In January 2024 it cut about 10% of its contractors, mostly in course creation and translation. In late April 2025 CEO Luis von Ahn told staff the company would be "AI-first", would gradually stop using contractors for work AI can do, and would approve new hiring only where a team could not automate more of its work; two days later it launched 148 new courses.
Results
Takeaway
Content production sped up sharply, but the AI-first memo and planned contractor phase-out drew immediate public criticism. Generative AI also added running costs: Duolingo's Q1 2025 gross margin fell to 71.1% from 73.0% a year earlier, mainly because of AI costs from expanding Duolingo Max, the company said.
Categories
- Industry
- Education
- Business function
- IT and R&DStrategy and organization
- AI technology
- Generative AI
- Adoption
- Built in-house
- Evidence
- Company's own claim
Sources
Source summaries
Reports the launch of 148 courses created with generative AI, more than doubling Duolingo's catalog, and quotes von Ahn that the first 100 courses took about 12 years while nearly 150 were built in about a year. It explains the "shared content" approach and links the launch to von Ahn's AI-first email earlier that week, which drew immediate backlash. It also notes that Duolingo cut about 10% of its contractors in January 2024, mainly in course creation and translation.
Duolingo's first-quarter 2025 letter to shareholders says the company introduced nearly 150 new language courses in the quarter using AI-generated content. It reports 46.6 million daily active users, up 49% year on year, and a gross margin of 71.1% against 73.0% a year earlier, mainly because of generative AI costs from expanding Duolingo Max. It also describes early work to cut AI costs, such as model optimizations for the Role Play feature.
Full details are in the original sources.
