Email sending API by developers for developers

Say goodbye to brittle templates and hello to a transactional email API that combines the precision of code with the flexibility of visual design, all in one streamlined platform.

The ultimate email creation API 

Welcome to email creation that combines pixel-perfect design with clean, efficient code.
From ambitious startups to growing enterprises, developers choose our API to bridge the gap between design and code. 

Save +5 hours/day

Generate +100 emails

Start with the email API in 3 steps

Transform your email workflow from complex coding to elegant simplicity. 

With Expressa, transactional emails meet stunning visual design, powered by developer-first tools that make implementation seamless and efficient.

Set up your account

Create your developer account and choose a plan, with a capacity of 1,000 to 50,000 emails per month. You'll get instant access to our visual builder and comprehensive API documentation.

Design your templates

Craft your emails visually with our drag-and-drop builder while our layout tree system keeps everything organized. Your templates will adapt perfectly across all devices.

Integrate the API

Connect your application through our RESTful API endpoints and start generating emails. Our system works smoothly with your preferred ESP to bring your designed templates to life.

An API that speaks your language

Where clean code meets beautiful design – transform complex email creation into elegant solutions that scale. 
Our platform brings together visual freedom and coding control, making template management feel like second nature. 

Why choose us ?

Visual email design

Create stunning emails without the hassle. Our intuitive drag-and-drop editor lets you design visually captivating emails in minutes - no coding required. Watch your ideas come to life instantly, and enjoy the freedom to bring your creative vision to reality with ease.

Smart layout management

Simplify even the most complex email designs. With our layout tree system, you’ll have complete clarity and control over your email structure, making it easy to organize and perfect every detail. Spend less time managing layouts and more time crafting impactful messages.

Cross-device optimization

Reach your audience flawlessly, no matter how they open your emails. Our responsive controls and real-time mobile preview ensure your designs look perfect on every device and email client. Deliver a seamless experience that leaves a lasting impression.

A smart way to create, design, and deploy Emails

Transform your email creation process with Expressa's visual builder and API integration. 
Based on your specific needs, design and generate emails that integrate seamlessly with your applications.

Visual design & template management

  • Create emails using our intuitive drag-and-drop interface with pre-made blocks
  • Preview designs instantly as you build them
  • Customize elements and styles to match your brand identity

Layout management

  • Navigate through your email structure using the layout tree
  • Organize elements efficiently with drag-and-drop functionality
  • Lock or hide elements as needed during the design

API integration

  • Clear RESTful API endpoints for email operations
  • Generate email HTML code to send through your preferred provider
  • Access comprehensive documentation and implementation guides

Email API use cases

Whether you’re crafting transactional emails or engaging marketing campaigns, our platform streamlines your workflow and seamlessly integrates with your systems.

Transactional emails

Create professional templates for order confirmations, receipts, and notifications using our intuitive drag-and-drop builder. Design once and reuse across your entire application.

  • Account-related emails and welcome messages
  • Password resets and security notifications
  • Order confirmations and receipts

Business communications

Design templates with dynamic content blocks that automatically populate based on your data. Create and manage email templates with our visual builder and layout tree system.

  • Powerful expression engine for personalization
  • Responsive layouts for all devices
  • Preview and test across email clients

Design high-converting emails in minutes

Turn complex requirements into visual masterpieces – control the full potential of email creation with a builder that speaks both designer and developer languages fluently.

Smart layout system

  • Navigate your email structure through the layout tree
  • Select and modify elements with precision
  • Quick-access toolbar for essential functions like undo/redo
  • Collapse and expand sections for a better overview

Mobile-responsive design

  • Built-in mobile view switching
  • Preview your designs across device sizes
  • Toggle element visibility for mobile displays
  • Ensure consistent rendering across email clients

Design controls

  • Adjust spacing with margin and padding controls
  • Customize backgrounds and borders
  • Modify font settings and styles
  • Set up responsive breakpoints for mobile optimization

Start building better emails today

Break free from the constraints of traditional email development. 

Our visual builder bridges the gap between design ambition and technical precision, turning every template into a perfect blend of form and function.

Ready to take your email generation to the next level?

Frequently asked questions

Does the email generation API allow embedding images or videos?

Yes, you can easily add visual elements to your email templates for more engaging content. Our layout management tools ensure that these elements render perfectly across all devices and email clients.

Does email generation API support bulk email creation?

Yes, you can upload large datasets via CSV or connect directly through API endpoints to generate personalized emails at scale, ensuring smooth and efficient bulk email campaigns.

How does Expressa ensure the highest email deliverability?

We leverage advanced email authentication protocols like SPF, DKIM, and DMARC, which verify the legitimacy of your emails and protect against spoofing. It integrates seamlessly with your preferred Email Service Providers (ESPs), allowing you to maintain a strong sender reputation and optimize deliverability through their robust infrastructure. 

Can you attach files to emails generated through an API?

Absolutely! You can attach files to emails generated through Expressa's API. Simply include the file attachment(s) when making the API request to send the email. Expressa supports attaching multiple files in common formats like PDF, PNG, JPG, etc.

Does the API allow integration with 3rd-party email services?

Absolutely. Our API is designed to work seamlessly with your preferred third-party email service providers (ESPs). You can create and manage email templates in Expressa while handling email sending and tracking through your existing ESP.

Can you create responsive emails with the email builder?

Sure! The email builder allows you to create fully responsive emails that look great on all devices and email clients. Emails will look stunning even on Outlook.

Can Expressa handle both marketing and transactional emails?

Yes, Expressa's email building and sending capabilities extend to both transactional emails and marketing emails. You can design transactional emails like receipts and notifications as well as newsletters and promotional campaigns. Use our drag-and-drop builder and API to create, personalize, and send both types of emails..