voidlabs/mosaico

Health v2 · maintenance only

Adoption not part of the score

1781 stars · 503 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Mosaico is an open-source JavaScript library/single-page application for visually editing responsive email templates via drag and drop. Editable content and styles are defined by the template itself using a simple template language, making the editor highly flexible.

Use cases

• build a drag-and-drop email template editor into my app
• let non-technical users customize responsive email newsletters
• edit email HTML templates that work across email clients
• embed an email builder in a newsletter platform
• create customizable email templates with a template language
• self-host an open-source email designer

When to choose

• you need users to visually edit email templates without touching HTML
• you want template-driven control over what is editable
• you're building a newsletter or email marketing tool and need an editor component
• you need responsive email output tested across major email clients

When to avoid

• you need a full email sending or campaign management platform (pair it with e.g. MailTrain)
• you want a generic web page or landing page builder rather than email
• you need a maintained commercial-grade editor with vendor support
• your stack can't integrate a JavaScript SPA or provide a backend for image upload/storage

Facets

library · maturity maintenance

templating ui-components frontend-framework email email web-development frontend cms browser email-template-editor drag-and-drop responsive-email email-marketing wysiwyg knockoutjs single-page-application web-server nodejs docker javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="voidlabs/mosaico")