What are some alternatives?
When comparing Email Hunter for Chrome and Leadfeeder, you can also consider the following products
Hunter - Find all the email addresses related to a domain
Marketing Optimizer - Optimize conversion rates, increase lead-to-close ratio, and resell leads easily. Includes complete WordPress integration.
Slik Prospector - Find anyone's email. No bounces.
Marketing 360 - Marketing 360® is a powerful marketing and website platform built for any size brand. It's fully managed and has everything a brand needs to drive beautiful marketing and sales.
Clearbit Connect - Clearbit Connect is a free extension that surfaces actionable information on the people who email you.
EngageBay - EngageBay is an affordable all-in-one marketing, sales CRM and service helpdesk software for growing companies to acquire, engage and nurture web visitors to happy customers.