Email Checker Basic is used to check and verify whether the email address is valid (format or syntax) and really existing on the corresponding email server without sending in SINGLE mode. Usually, it is used to maintain a clean emailing list.

Heybounce is an email verification service that offers fast, accurate, and secure email verification. Its primary goal is to help companies reduce bounce rates and protect their sender reputation.

Email Address Validation API. Stop bounced emails and spam subscribers! Test if emails are valid and active to clean email lists. API built for developers.

Email Inspector is an email list verification tool that aims to help marketers, small and large companies ensure that they only send emails to real users and separate low-quality addresses from high-value contacts.

ZeroBounce is an email validation software that cleans your email list by removing invalid emails, reducing the risk of bounces and protecting your sender reputation. It also removes known email complainers and spam traps from your list.

Mailbite improves your email marketing performance by using email verifier tools. You can remove invalid, disposable, spam and other unsafe email addresses.

Simple email verifier is PHP script use Trumail API to verify bulk email addresses. The data collected through JSON and data delivery format is CSV.

Null Bounce is an email validation tool that helps companies decrease the bounce rate for email campaigns. Also, the service is available as an API, which can be used, for example, on sign-up forms to ensure that user submits a valid email address.