Db4 is open source: local RAG on Postgres in a browser tab (lab4.app)

Db4 has launched as an open-source project, allowing users to run a fully functional Postgres database directly within their browser. This innovative approach leverages WebAssembly to compile Postgres into a lightweight format, enabling local relational AI generation (RAG) capabilities without relying on cloud services. Users can easily connect via standard Postgres clients or Object-Relational Mappers (ORMs), while ensuring that all data remains local to their machine, enhancing privacy and control. This development is significant for the AI/ML community as it redefines data ownership and access models. By placing the data within a browser tab and establishing a trust model where the browser retains exclusive control over data access, Db4 inverts traditional database architectures. It offers a range of applications, from teaching SQL to building local-first RAG solutions and prototyping databases without any external dependencies. The project invites developers to contribute and innovate, opening new avenues for local data management and AI processing.