I think dust.tt is open source as well. Is there a difference here?
I tried to look up their RAG pipeline to see if they've invested effort into building a strong retrieval. It looks like they have a more basic vector only search, not sure if it's running local models or using a cloud service. On the flip side, it looks like they have assistants that can take actions (which we don't do), so maybe that's their focus.
I can only speculate as I've never spoken with their team but I imagine they're working closely with a few specific teams judging based on their number of connectors. Most likely it was built for specific customers. We are leaning more into the open source and working with our community and letting people self-host easily to find value with no friction.