mailboxlayer API is described as 'Mailboxlayer is a free, simple and powerful JSON API offering instant email address validation & verification via syntax checks, typo and spelling checks, SMTP checks, free and disposable provider filtering, and much more' and is an app in the security & privacy category. There are more than 10 alternatives to mailboxlayer API for a variety of platforms, including Web-based, SaaS, Windows, Mac and Google Sheets apps. The best mailboxlayer API alternative is useBouncer. It's not free, so if you're looking for a free alternative, you could try Email Verifier or EmailCheck. Other great apps like mailboxlayer API are mailfloss, EmailRecon, Email Verification Add-on and uProc.
Faster API, lower price, and more accurate