V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Email Verifier - Email verifier app lets you verify email.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
RingLead - RingLead offers a complete end-to-end suite of products to clean, protect, and enhance company and contact information.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI