Google Analytics is a freemium web analytics service offered by Google that tracks and reports website traffic. Google Analytics is offered also in two additional versions: a subscription based Google Analytics Premium targeted at enterprise users and Google Analytics for Mobile Apps.
Upsight is a scalable analytics and marketing platform for web & mobile app developers. Customizable mobile analytics to explore user behavior, understand app performance, and conduct deep data analysis. Moreover they offer real-time marketing tools to deploy personalized user experiences and improve business metrics.
Piwik is a free and open source web analytics application written by a team of international developers that runs on a PHP/MySQL webserver. It tracks online visits to one or more websites and displays reports on these visits for analysis.
Kissmetrics is a San Francisco based customer analytics platform founded by Neil Patel and Hiten Shah. Kissmetrics provides visualization tools on how users interact with their site, web apps, and mobile products It collects and shows customers acquisition data for each user.
Snowplow is an enterprise-strength marketing and product analytics platform. It does three things: 1) Identifies your users, and tracks your users' data 2) Stores the data in a scalable "event data warehouse" which you control 3) Lets you use tools to analyze that data, including big data and traditional tools.