Captain Verify - Captain Verify is the best solution to Verify & Clean the validity of your emails.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
CampaignKit - Email Validation for marketers. Detect invalid and malicious email addresses in your email lists.
ActiveCampaign - Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
ListClean - Get rid of invalid, abuse & spam-trap from your email list.
Pardot - Salesforce B2B marketing automation