Owler - Owler is a crowdsourced data model allowing users to follow, track, and research companies.

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

QlikSense - A business discovery platform that delivers self-service business intelligence capabilities

CB Insights - CB Insights is a company database for the venture capital and corporate development community.

Foxmetrics - We track the interactions of your customers with your web or mobile applications in real-time, and provide actionable metrics that will help increase your conversion.

Tracxn - data on companies