What are some alternatives?
When comparing VERIFIGATOR and ListClean, you can also consider the following products
Email Verifier - Email verifier app lets you verify email.
clearout.io - The easiest and real-time email verification and validation tool.
DataValidation - Email validation and email verification service integrated with MailChimp, MailUp, HubSpot and Zapier.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
Advanced Email Verifier - List hygiene plays a role in the delivery race.