What are some alternatives?
When comparing VERIFIGATOR and mailboxlayer API, you can also consider the following products
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Email YoYo - Email YoYo is an list cleaning and real-time email verification API to verify email addresses online.
ListClean - Get rid of invalid, abuse & spam-trap from your email list.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
DataValidation - Email validation and email verification service integrated with MailChimp, MailUp, HubSpot and Zapier.
Verifalia - Verifalia is a web-based email validation that lets users to upload and validate lists of email addresses.