even if it's private alpha, you should probably release it to a friendly hostile audience or feedback. Once against it is beta, you can release it to the world at large because well that's what a lot of SAAS companies do. Once you get some revenue, then you can make it better. Otherwise, if you don't get the feedback you need on how to make the product better and live in your own head, you might find yourself polishing turd. if I want to see someone who's done that, all I need is a mirror.