Google Analytics is a powerful tool, though a bit old fashioned. It gives you the data you need, but they are bundled together and you have to make sense of them.
Co-founder & CTO - Moving Analytics
73%Stacklist Startups Are Using Google Analytics
Google Analytics is well-known to most startup teams - and most would recommend using its free services until it’s absolutely necessary to upgrade. Google Analytics makes it easy to track and report metrics on website traffic. Its real-time data helps companies optimize their content and traffic strategy so that they create the most fluid, user-friendly and profitable online presence. And did we mention it’s completely free?
This tool has a broad following among virtually all startups. Seed-stage companies are attracted by the free factor and by the basic data points that generally suffice for their stage of growth. Larger companies use its general business intelligence capabilities in combination with more sophisticated tracking software that can be customized to their specific needs.
Google Analytics is free, but has a premium version ($150,000 a year) that brings you additional features like advanced segmentation and content experiments.
Visit the website: http://www.google.com/analytics/