Proofy.io vs Stack

With Proofy.io you are working with real email addresses and real people

This online service is designed to check the validity of email addresses. The customer receives a quality check email addresses at an affordable price. From concurrency makes us different price, an individual approach to each the client and scan speed.

Smart Browser For Internet Multitaskers

Stack is designed to separate every-day web apps from less important web pages, organize them efficiently in one place and help you navigate through them faster than you would do with old-fashioned browsers.

Location: Amsterdam, Netherlands