Owler - Owler is a crowdsourced data model allowing users to follow, track, and research companies.
StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
AFSAnalytics - AFSAnalytics.
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Woopra - Track your customers' web and mobile activity, forms, emails, support tickets and more, all in one place with customer analytics. Analyze and take action.