RAGFlow

RAGFlow is an open-source engine that you run yourself for building question answering over your documents. Its distinguishing feature is deep document understanding, which reads layouts, tables and scanned pages more carefully than simple text splitting. The web interface lets you upload files, pick chunking strategies, and see which passages support each answer, with citations. It also supports agent workflows and connects to many model providers. RAGFlow is free to self-host. It appeals to teams that want a ready-made interface and strong parsing without paying for a managed service.