InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
BlackRock Aladdin - BlackRock Aladdin is an advanced-level portfolio management software that helps you to manage and view your daily investment under the guidance of highly trained investment professionals.
Clearbit - Clearbit provides Business Intelligence APIs
TLDR Options - Guesstimate the possible value of startup options
DiscoverOrg - DiscoverOrg is an IT sales intelligence platform providing technology marketers access to data, IT org charts, and real time projects.
Company 360 - Research data to invest in quality undervalued companies.