Codeway redefines language learning with ElevenLabs

Codeway is a global consumer app company with more than 500M users worldwide, operating a portfolio of mobile applications across wellness, productivity, and education. One of its flagship apps, Learna, offers an AI-powered, conversational approach to English language learning.

Instead of passive learning methods, Learna users engage in FaceTime-like dialogues with an AI tutor that adapts to their level, interests, and goals. The experience is designed to feel interactive, responsive, and personal.

To build this experience, Codeway integrated ElevenLabs’ Text to Speech to generate expressive, lifelike voices that respond instantly - allowing users to feel as if they’re speaking with a real tutor rather than a scripted system.

Choosing the most natural multilingual voice

To enable real-time conversations, Codeway needed a voice technology that could meet strict requirements for naturalness, multilingual quality, and latency. 

During the research phase, the team assessed several providers against these criteria. ElevenLabs stood out for consistent voice quality across languages and strong real-time responsiveness.

To validate these findings, Codeway ran an A/B test in a live production environment, comparing its legacy Text to Speech system with ElevenLabs. This made it possible to measure how voice quality affected user engagement and business outcomes such as conversion and lifetime value (LTV.)

From a technical standpoint, the integration process was straightforward. The SDK and documentation were clear, and the developer experience was described as “clean and well-structured.” The team completed the integration without major challenges and moved quickly into testing.

Measurable impact on conversion and lifetime value

The experiment delivered clear results. After replacing its legacy Text to Speech system with ElevenLabs, Codeway achieved:

• 9% uplift in user trial conversion rate
• 11% uplift in lifetime value (LTV)

These results confirmed that more natural and emotionally rich voice interactions not only improve the learning experience, but also drive measurable business outcomes.

“ElevenLabs manages something that’s genuinely hard to pull off: voices that sound natural and emotionally rich, backed by an API that’s solid and dependable. That combination made it possible for us to scale into new languages and markets with confidence, without rethinking our infrastructure as we grew.” – Cankut Kostur, Senior Software Engineer, Codeway

Building immersive learning experiences at scale

For Codeway, voice quality is a lever that directly influences learning outcomes, user engagement, and business performance. By integrating ElevenLabs into Learna, the team delivered a more immersive tutoring experience for users with measurable gains in conversion.

As Codeway continues to expand into new markets and product categories, high-quality voice remains central to scaling personalized learning experiences globally. The collaboration between Codeway and ElevenLabs demonstrates how natural, emotionally intelligent AI voices can transform how people learn, communicate, and build confidence in a new language.