I don't think it's off limits at all. They're a startup and you should be welcome to ask them about their goals and status on any aspect from funding to the act

I don't think it's off limits at all. They're a startup and you should be welcome to ask them about their goals and status on any aspect from funding to the actual product itself. I interviewed at a startup not too long ago and the interviewer actually brought up their funding so you may not even have to ask :)