Dyad is a local, open-source AI app builder that allows users to create full-stack applications with zero lock-in, running entirely on their machine. It supports integration with AI models like Gemini 3, GPT-5, and Claude Sonnet 4.5, while enabling local model execution for enhanced privacy and performance. With built-in tools like Supabase integration for authentication, databases, and server functions, Dyad provides a flexible development environment with no external dependencies.