HarnessRouter lets developers run multiple sandboxed agents, including Codex, Claude Code, and Hermes, inside their products through one API. It turns months of agent backend work into minutes.
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.
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
What's great
easy to use (1)API access (1)high quality retrieval (1)supports multiple data formats (1)UI builder (1)