What are some alternatives?
When comparing ListClean and DeBounce, you can also consider the following products
clearout.io - The easiest and real-time email verification and validation tool.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
DataValidation - Email validation and email verification service integrated with MailChimp, MailUp, HubSpot and Zapier.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Email Verifier - Email verifier app lets you verify email.
Bounceless - Bounceless.io offers a tool to clean, validate and verify email list.