How much beta-testing have you done? I'd work with a free plan at first, simply because the value of your first 10-100 customers isn't the money they bring in;

How much beta-testing have you done? I'd work with a free plan at first, simply because the value of your first 10-100 customers isn't the money they bring in; it's the information you learn about your own product. On the other hand, this is an easily reversible decision either way, but starting paid-only is probably easier to change. In the worst case that nobody notices you, you can always add in a free account in a few weeks.