Dyad is an open-source, local AI application builder that lets users create web apps through natural-language interaction with coding models. It is positioned as a locally controlled alternative to hosted AI app builders, with the generated project files living on the user's machine and remaining accessible for normal development workflows.

The application provides a desktop interface for prompting an AI to create and modify projects, previewing the result, and iterating on the code. Its local-first design allows users to choose model providers and keep ownership of the generated code rather than locking the application inside a proprietary hosted editor.

Dyad is aimed at founders, designers, developers, and non-specialists who want to prototype or build web applications with AI while retaining direct access to the codebase. It combines the convenience of conversational app generation with the portability of a conventional local project.