I did a lot of research until I found Epsilla. Epsilla is the single best tool for non-technical teams to build meaningful AI services around knowledge bases. The best part is the quality of knowledge retrieval is high, and it can handle any format you throw at it, meaning non-technical collaborators can manage the data. They can even create UIs, but I love that Epsilla has a great API for piping into your own UI. Every similar app I've tried in this space just kind of sucked. Epsilla has been killer every minute. This is hands down the winner in the space