What are some alternatives?
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Hunter - Find all the email addresses related to a domain
KiteDesk - Use KiteDesk sales prospecting software to generate leads from our premium data marketplace. Then reach prospects and build a sales pipeline with organized Lead Lists. Syncs direct with CRM too!
Norbert - Norbert is an online tool that helps you to find anyone’s corporate email address.
HubSpot Marketing Free - Free lead capture and marketing tools.
Prospect.io - Prospecting, like a boss. Find any email, reach out, measure everything and integrate with your CRM.