FastGPT is an open-source AI knowledge base platform providing data processing, model invocation, RAG retrieval, and visualized AI workflow orchestration capabilities, helping users easily build sophisticated AI applications. It supports the development of AI customer service for specific domains, automates data preprocessing, workflow orchestration, and offers robust API integration. FastGPT's advantages include its open-source nature, unique QA structure, visual workflow, unlimited scalability, ease of debugging, and support for multiple models.