WhyHow Knowledge Graph Studio is an open-source platform designed to streamline the creation and management of RAG-native knowledge graphs. The platform offers rule-based entity parsing, modular graph construction, flexible data ingestion, and an API-first design, along with SDK support. It is built on a NoSQL database, providing a flexible and scalable storage layer that simplifies the retrieval and traversal of complex relationships. The platform is suitable for handling both structured and unstructured data, enabling the construction of exploratory graphs or highly structured constraint graphs, aiming for scalability and flexibility for both experimental and large-scale use.