Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
BriteVerify - Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!
Trumail - Free email verification API
Bouncebuster by Overloop - Bouncebuster is a real-time email verifier that helps you fight bounce & increase email deliverability.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.