Open Source Email Template Builder

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Choose a template to start...

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Design and code an email that works on every device and client is a huge and demanding work also for professionals.
Mosaico allows you to realize a beautiful and effective template,
without a team of professionals and hours of testing to make it work everywhere.

Saved Sessions

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#key versamix YYYY-MM-DD YYYY-MM-DD

Why Mosaico

Responsive and tested Templates

working with all major email clients and devices


graphic personalization of the overall theme


and style customization of single element

Intuitive drag&drop image upload

and automatic resizing to fit available space

Global undo/redo system

stop wasting time by saves, reviews and confirmations

Custom templates support

with a simple template language (make your html design work on Mosaico in few hours)

Open Source

Mosaico is distributed under the GPL license and the complete code base is available on GitHub

Made by professionals

with love and care ;)

Simple and effective
Design cool email in seconds
Drag and drop
Natural User Experience
Code your template
And make it work with MOSAICO
Choose template blocks
provided by the template
Personalize contents
Block variants, image placements, sizes, visibility and urls
Style customization
Depending on the template you can customize colors, fonts, text size, buttons and much more

Let's Get In Touch!

Developers, template authors, final users, UI/UX designer: whatever your role we'd like to receive feedback and suggestions (NO support requests), write us at feedback at!

If you need support read here

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