Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Hunter - Find all the email addresses related to a domain
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
AnyMailFinder.com - Find anyone's email address
Tracxn - data on companies
Swordfish AI - Number 1 cell phone and email finder! Works on LinkedIn, Facebook, Twitter, Github, Stack Overflow and more!