Yeah, if you've got 80% of your revenue coming from one customer, that's not great. But it all depends on how you work with your customers. In my business, thin

Yeah, if you've got 80% of your revenue coming from one customer, that's not great. But it all depends on how you work with your customers. In my business, things are pretty hands-off, and we have calls only a couple times a year, largely to talk about promoting our work together (our tech is a customer-facing differentiator for them, so we give joint talks at conferences and such). I don't think there's some magic percentage, over which you need to diversify. You should always be looking to get other customers, and if you have one big one then it should be easier to get other big/medium-sized ones.