[MalcolmDiggs]

Well, what's failure?

If failure is the total loss of an entrepreneur's own capital, then VCs and Angels already do this. They (in some cases) completely insulate the entrepreneur from losing his/her own capital in the business.

If failure is the lack of a return, or the lack of profitability, then I would expect any service to lie on the typical risk/reward curve associated with all financial instruments. That is: if your service eliminates all risk, it should also eliminate all reward greater than whatever T-bills are returning.

So it's hard to imagine what kind of service you could be talking about.