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

SurveyCircle - SurveyCircle is the world’s largest community for mutual support in online research – helping students, PhD candidates, researchers, founders, and startups to find survey participants for research studies and market research surveys.

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

SurveySwap - Find survey participants for free. help each other by taking each other's surveys.

Tracxn - data on companies

Pollfish - Pollfish's mobile survey platform provides today's professionals with deep insights from real consumers leading to better business decisions. Create your first survey in minutes.