EspaLuz is an AI-powered Spanish language learning platform deployed on WhatsApp that uses a two-layer memory architecture (short-term key-value store and long-term graph database) to maintain conversation continuity across sessions. This approach enables personalized learning experiences by recalling user preferences, progress, and conversation history without incurring high costs from paid vector stores. The system employs a multi-agent architecture with Groq and Claude routing to scale and manage user conversations. EspaLuz achieved a 30% retention rate with paying users, significantly higher than a prior web app's 2%, demonstrating improved engagement and user satisfaction.

Jun 12, 2026, 1:58 PM