Poirot

Poirot is an email finder tool focused on sales & marketing, HR, and Recruiting teams/individuals. It offers both email address lookup for individual prospects or domain search where you'll get all publicly available email addresses associated with the target domain.

Great options for teams requiring such a tool are also integrated right from the beginning. You can have and control infinite number of teams. It's easy to change workspaces and jump from private to team accounts. There is a forever Free plan (no card required) that gives you 20 lookup searches and 100 verifications per month, while each new referral signup brings 25 permanent credits to both referrer and referee.