Curious.. which 'bring your own keys' -style competitors have venture funding?
MSTY is the first one that comes to mind though. And if you're willing to stretch your idea of "what competes with OpenWebUI" I know half a dozen startups that let you pass in some set of keys and "build a multi-agent system" in a GUI usually alongside some pared down chat windows.
Could you give names of those startups?
And yeah, Hugging Face is very much venture funded -- they had a modest 4.5b valuation in the last round.. (I just didn't know they had some competing product).