Email Address Validation API

Improve deliverability by validating email addresses before you send.

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Better delivery rates

More messages delivered to real contacts.

Use our real-time API to detect and suppress invalid email addresses. With a clean list, you reduce your bounce rate and perform better with mailbox providers to improve delivery.

  • Real-time Email Address Validation API

  • Machine Learning and mailbox provider-friendly tactics

  • Ability to identify mistyped, inactive, non-existent, disposable, or shared (team@, help@)

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Minimize funnel leaks

Don’t lose leads to typos.

Connect the real-time API to lead capture forms to catch false entries right away. Prompt visitors to resubmit with the provided correction suggestion—no need for additional confirmation fields.

  • Guarantee recipients get the emails they want from you

  • Avoid losing contacts due to accidental email address typos

  • Remove additional fields like email address confirmation

Safe senders only

Stay in the ‘good sender’ category.

Our API doesn’t use the broken SMTP-handshake, which attempts to validate an email address by connecting to mailbox providers until receiving a response and then breaking the connection.

  • Avoid Spammer-affiliated tactics used by other vendors

  • Do not use the broken SMTP-handshake

  • Maintain mailbox provider trust

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Learning at scale

Learning at scale

Smart and safe—almost like hiring a 🤖.

Put our massive dataset to work with a machine learning model that informs email address validity scoring. You can trust that we’re always working to improve your deliverability.

  • Use ML model trained with data from 100 billion emails/mo

  • Built and maintained by in-house Data Scientists

  • Protect recipients’ personal data with GDPR compliance

How much will it cost?

Available for Pro and Premier plans.
Pay per validation after you exceed your plan’s limit. Or request a quote with the button below.




Ready to start sending?

Free to get started. Free to send.