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When I learned about Paubox, I knew it was exactly what I needed. There wasn’t really even a question. For the vast majority of users, the experience would just be email—familiar, ubiquitous email.


Daniel Nelson

Secure deliverability

Securely send HIPAA compliant email via our HITRUST CSF certified email API solution.

Easy to set up

Integrate quickly with our RESTful APIs and SMTP libraries. Paubox Email API supports eight programming languages, including Javascript (via Node.js), Ruby, PHP, Python, and others.

Focus on your product

You build. Let us maintain the HIPAA compliant email infrastructure. Get to market faster by quickly integrating a secure, seamless email product that works equally well on desktops, laptops, smartphones, tablets and wearables.

How Paubox Email API works


01. Emails sent via your app

Your application triggers an email to be sent with Paubox Email API


02. Emails get encrypted

Emails are seamlessly encrypted by Paubox servers with 128/256-bit AES encryption.


03. Protected in transit

Emails are protected while on their way to the recipient's inbox with TLS 1.2 encryption protocol and higher


04. No TLS 1.2+? No problem!

If the destination inbox can't receive encrypted email, then a secure link is delivered to view the message

Developer resources

Download software development kits and review instructions in the developer document portal.

What’s included in the Paubox Email API?


Paubox Email API allows software developers to instantly add HIPAA compliant email messaging to their applications through an API. Plus, the software is free for up to 300 emails sent per month.


4,000+ customers trust Paubox to secure 68 million emails every month

“We’ve helped some of the biggest names in the industry do exactly that”


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