How to beat Google analystics?

I am looking for idea to work on it. And I come up with it. So is it possible or even worth to work on this area with hope to beat google analytics(maybe I am dreaming but it's nore for motivation). The idea behind this is to be able to master his data without sending them to google and more. The first step will be to have a simple tool/framework to build newsletters/campaign and get metrics to analyze and see what we reached (by segmentation, by color .....). What do you thing about this idea? am I crazy to jump myself on it.