SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Look at that SaaS - Inspiration and resources for SaaS founders
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
SaaS Funding Napkin - What does it take to raise capital in SaaS in 2018?
Tracxn - data on companies