[tomhallett]

While your VC answer is probably the case more often than not, here is one technical answer to your question:

Instead of "proof of stake" as the consensus model, you could build a "consortium blockchain" where other parties (ie your big customers) get to validate the blocks themselves in addition to your servers. "Proof of authority" or "delegated proof of stake" are consensus models for this approach. This would be helpful if you want the data to be private but you want to increase trust within your platform.