Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Dealroom.co - Identify promising companies before everyone else. Dealroom helps professional investors, corporates and local governments to discover & track innovative tech companies.
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
Tracxn - data on companies
Capital IQ - Capital IQ (also known as CapIQ or S&P Capital IQ) is a market intelligence platform created by Standard and Poor’s (S&P).
Owler - Owler is a crowdsourced data model allowing users to follow, track, and research companies.