I agree with the advice to ask a lawyer, but it’s sensible to be concerned with license agreements even in early-stage ventures that couldn’t enforce them.

By establishing the company as licensor, an agreement might help the founders avoid personal liability if a customer sues. Later on, it may be desirable to show potential acquirers that, from the company’s inception, its customer contracts included terms to confirm ownership of intellectual property, limit liability, satisfy privacy laws, and so on.