Hunter - Find all the email addresses related to a domain
Skuuudle - Discover, match and monitor your eCommerce competitors.
Snov.io - More leads. More sales. More revenue.
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
MailDump Verifier - Powerful Emails Verifying Tool that helps verify email address or validate email addresses
BuiltWith - Find out the technology behind websites