What are some alternatives?
When comparing Zizozz and RocketReach, you can also consider the following products
Hunter - Find all the email addresses related to a domain
Email Hunter for Chrome - Find all the emails related to a domain with just one click
Find Email Address - Highly Accurate Email Finder and Verifier
FindThatLead Prospector - Feed your sales team with daily leads.
LeadIQ - VP of Sales. Every second in sales counts. You hired your sales team to sell, not do data entry. LeadIQ will pump up your sales team with accurate prospect data and a smooth workflow so you can fill up your pipeline faster.
Email Generator - Get +50 email combinations and validate them with Rapportive