NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Litmus - litmus tests and tracks your email campaigns, so you can always put your best design forward.
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
Return Path - Inbox placement solutions from Return Path helps improve email deliverability and increases email marketing ROI.