What are some alternatives?
When comparing NoBounce Email List Cleaner and LeadGibbon, you can also consider the following products
Email Verifier - Email verifier app lets you verify email.
Hunter - Find all the email addresses related to a domain
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Norbert - Norbert is an online tool that helps you to find anyone’s corporate email address.
useBouncer - The most intelligent email checker, that lets you focus on valuable relationships! Verify email address with simple App or easy-to-integrate API.
AeroLeads - AeroLeads is a lead generation software which finds prospects with email and phone number.