Star-based rating systems have lost their utility. They don't do a good job in distinguishing the best products from one another. Pearstack solves this problem, and takes it a step further by allowing users to interact with one another in the Pearstack marketplace. Pearstack will be the next evolution of online shopping, by accounting for contextual and personalized priorities and preferences. Pearstack will become the place where people go to learn about, discuss, buy, sell and trade products.