Preply uses OpenAI to launch AI-generated lesson summaries, providing personalized feedback and language learning exercises.

Preply⁠(opens in a new window) is the world's largest marketplace for online language learning, connecting more than 100,000 expert tutors with learners across more than 180 countries. Through personalized one-to-one instruction across more than 90 languages, Preply’s mission is to make high-quality language education accessible to anyone, anywhere.

Language learning is fundamentally human. It requires conversation, confidence, motivation and cultural understanding. While Preply tutors provide irreplaceable energy, motivation, cultural nuance, and human connection for learners, they also face repetitive tasks: writing personalized plans and lesson notes. Students, meanwhile, often require a clear sense of progress to keep engagement high.

Preply saw an opportunity to use AI to strengthen—not replace—the relationship between tutors and learners. The result was Lesson Insights, an OpenAI API-powered experience that transforms every lesson into a personalized learning journey.

After each 1:1 lesson, OpenAI analyzes the lesson transcript and generates tailored feedback across grammar, vocabulary, and pronunciation. Learners receive actionable guidance. Tutors spend less time on administrative work. And both gain a richer understanding of progress over time.

To find the right technology partner, Preply evaluated multiple AI models across language-learning tasks. OpenAI consistently delivered strong performance, while providing the speed, reliability, and production readiness needed to serve learners at global scale.