Mattermark - Ranking 800,000+ high growth Internet companies

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.

Breakout List - A list of the fastest growing startups

Heap - Analytics for web and iOS. Heap automatically captures every user action in your app and lets you measure it all. Clicks, taps, swipes, form submissions, page views, and more.

Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.

Yandex.Metrica - A free tool for evaluating site traffic and analyzing user behavior