Hunter - Find all the email addresses related to a domain
CoinList - Build a diverse portfolio of pre-launch token investments
Apollo.io - Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.
Crypto Buyer's Guide - Extensive cryptocurrency buying guide
Icypeas - This email finder has the capacity to bypass catch-alls
CoinCap.io - Shows the prices of different cryptocurrencies from ShapeShift.