Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Site Rank Data - View historical rank information of websites via time series charts.
Google Audience Center - 3 votes and 6 comments so far on Reddit
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.