Epsilla (YC S23) earns praise for making knowledge-driven AI agents approachable for non-technical teams while still appealing to experts. Reviewers highlight fast search and retrieval, flexible data handling across formats, and a solid API that integrates cleanly into custom UIs. Many note strong support and helpful community responses. It’s seen as reliable for building knowledge bases quickly and offloading vector store complexity. Downsides are mostly about pricing at higher message volumes. Overall, users credit Epsilla with speed, usability, and responsive support.