Mosaico
Mosaico is a free, open-source email template collection built with HTML. Mosaico - Responsive Email Template Editor. It has 1,782 GitHub stars and is released under the GPL-3.0 license. A live demo is linked from this page. Start a project with npx degit voidlabs/mosaico or clone the repository.
github.com/voidlabs/mosaico (opens in a new tab)
Data as of from the GitHub API; description from the project's repository. Report an error
Get started
Copy the files into a new folder with degit (no git history), or clone the repository with git.
npx degit voidlabs/mosaico my-emails
cd my-emailsgit clone --depth 1 https://github.com/voidlabs/mosaico.git my-emailsSources: GitHub docs on template repositories, degit.
About Mosaico
Mosaico is a JavaScript library (or maybe a single page application) supporting the editing of email templates. The great thing is that Mosaico itself does not define what you can edit or what styles you can change: this is defined by the template. This makes Mosaico very flexible.
Built with
- HTML
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How do I use Mosaico?
Copy the files into a new folder with npx degit voidlabs/mosaico my-emails (no git history), or fork the repository on GitHub. Then follow the README for the install and dev commands.
Can I use Mosaico for commercial projects?
It depends on the GPL-3.0 license. CC-BY licenses need visible attribution, GPL and AGPL licenses require sharing your changes under the same license, and other licenses have their own terms. Read the LICENSE file in the repository before shipping a client project.
Is Mosaico maintained?
The repository's most recent commit was on Sep 22, 2026. Its latest release is v0.18.11. appsgit only lists templates from repositories with a commit in the last six months.