NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Dropsource - Mobile development platform for building native iOS & Android apps
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
GoodBarber - GoodBarber is a mobile app creation platform.
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
Fuse - Fuse is a UX tool suite for mobile app designers and developers.