HIPAA compliant email API for healthcare IT software companies

  • Send secure transactional messages via an API
  • Add HIPAA compliant email capabilities to third-party software applications
  • REST API and SMTP options
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Shutterstock 2169744901 1
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When I learned about Paubox

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.

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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.

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How Paubox Email API works

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Email sent via your app

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

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Emails get encrypted

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

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Protect emails in transit

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

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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 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.



Billed annually
1-300 emails

Product features


Programmatically send HIPAA compliant email

Customizable API with multiple client libraries.

Optimized email deliverability

Maximizes email deliverability and avoids outbound email ending in spam folders by updating your SPF record and configuring DKIM and DMARC protocols.

Dynamic email templates

Create templated messages that can be customized with dynamic data.


HITRUST CSF certified

Our solutions have met key regulatory requirements, industry defined requirements, and appropriately manage risk.


TLS protocols 1.2 & 1.3

As per NSA guidance, Paubox supports only TLS 1.2 and TLS 1.3. The following obsolete protocols are not supported: SSL 2.0, SSL 3.0, TLS 1.0, and TLS 1.1.

Blanket TLS email encryption

Maximize the security of your organization’s emails by enforcing TLS secure email for every email sent and every campaign. No cumbersome portal login required for recipients. Blanket TLS email encryption is our unique, patented solution.

Two-factor authentication

Require authentication beyond a username and password when logging into your Paubox account.

U.S. data centers

Rely on our cloud-based, redundant infrastructure with 99.99%, uptime. Customer data is stored encrypted at-rest and solely in U.S data centers.


Real-time analytics

Comprehensive email analytics, mail logs, ruleset access, and quarantine.


Webhooks alert you when a message has been delivered, has a temporary failure, or has a permanent failure.



Use our RESTful APIs that are built on HTTPS and return JSON for clear implementation.


Deliver your email via our servers instead of your own client or server.

Comprehensive client libraries

Code in your preferred language with open source libraries and use cases in Node.JS, Ruby, Python, PHP, Ruby on Rails, Java, Perl, and C#.

API docs

Expedite end-to-end integration time with our robust API documentation.


Help center

Learn how to use Paubox products quickly with concise how-to articles, and step-by-step instructions.

Phone support

Our customer success team is available by phone for extended hours, Monday through Friday, to assist with any technical or support issue our customers might have.

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

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Try Paubox Email API