What are some alternatives?
When comparing Impressionwise and DeBounce, you can also consider the following products
Email Verifier - Email verifier app lets you verify email.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
EmailRecon - Real-time email adddress validation and verification. The EmailRecon cloud list verification tool allows you to clean your email lists with a single click.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
NoBounce Email List Cleaner - Email list validation & cleaning maximizes the efficiency of your email marketing campaigns and protects your email sender reputation.
clearout.io - The easiest and real-time email verification and validation tool.