Kotaemon, an open-source UI for document-based chat, has gained significant attention recently. The tool allows users to set up a customizable RAG (Retrieval-Augmented Generation) interface, supporting both local and API-based LLM and embedding models. It is particularly useful for journalists and researchers, offering privacy and accuracy in answering questions, as demonstrated with the EPA's Greenhouse Gas Inventory. Kotaemon supports advanced indexing techniques like GraphRAG and is praised for its ease of use and flexibility. The tool is free and integrates with platforms like Cinnamon and Gradio.