Do you let organizations white-label it so its more customized (i.e. remove the Onyx branding, preload it with their internal MCP servers / docs) and feels like their own internal chat tool?

Yes absolutely! There's no license restriction on white-labeling, so we've seen lots of companies do that.

In our opinion, it's a bit silly to build completely in house when you can take something like Onyx as the starting point and be >95% of the way there + have a tons of bells and whistles built in.