FastGPT is an open-source platform for building AI agents and knowledge-based applications. It combines model access, data processing, retrieval, and a visual Flow editor so users can assemble conversational and automated workflows without implementing every orchestration step from scratch.

The platform supports document ingestion from common office and text formats, URL-based data, knowledge-base workflows, plugins, dialogue flows, and basic RPA-style nodes. It can be deployed privately with Docker or used through the project's hosted service, with commercial editions available for organizations that need additional functionality and implementation support.

FastGPT is useful for teams building internal knowledge assistants, customer-service bots, RAG applications, and workflow-oriented AI agents. Its visual orchestration layer makes complex multi-step behavior more accessible, while self-hosting provides an option for organizations that need tighter control over models, documents, and application data.