MailShot - Infinite Canvas for Email Campaigns

Build newsletters like a designer, not like a marketer

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Updated Jul 2026 · Added Jul 2026

dispatch-ruby.vercel.app

Newsletter ToolsFreenewsletter-tools

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What is Mailshot?

MailShot is an open-source newsletter editor that lets designers build entire email campaigns on an infinite canvas - not one email at a time. It features drag-and-drop block composition, real-time compatibility checking across 18 email clients, and exports clean production-ready HTML or React Email components. Built for teams who want full ownership of their code with no vendor lock-in.

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Key Features of Mailshot

Drag & drop infinite canvas
Compatibility checker for 18 email clients
Test email preview in your inbox
Export production-ready HTML or React Email
Multi-page projects with A/B variants
Team workspaces with role assignment
Version history and snapshot browsing
Curated template library
Self-hostable and open source
MIT licensed

Who Should Use Mailshot?

Design complete newsletter campaigns for marketing teams

Build welcome series and promotional emails

Create product launch campaigns

Collaborate on email designs across teams

Test email rendering before sending

Mailshot: Pros & Cons

✓Pros

Free and open source forever
No vendor lock-in
No paywalls on core features
Self-hostable
Full code ownership
Designer-friendly interface
Comprehensive email client compatibility checking
Team collaboration features
Version history for easy rollbacks

Frequently Asked Questions about Mailshot

Can I export my MailShot newsletter as React Email components?

Yes. MailShot exports production-ready React Email components alongside clean HTML, so you can integrate newsletters directly into your codebase without copying and pasting markup. This is useful if your application already uses React Email for other email work.

How does MailShot test compatibility across email clients?

MailShot includes a real-time compatibility checker that tests your design against 18 email clients as you build, showing you where rendering problems occur before you send. You can also send a test email to your inbox to see how it actually renders in your own email app.

Can I self-host MailShot?

Yes. MailShot is open source under an MIT license and self-hostable, so you can run it on your own infrastructure with full code ownership. There is no vendor lock-in and no paywalls on core features.

Does MailShot support A/B testing variants?

MailShot lets you create A/B variants within a multi-page project, so you can design alternate versions of the same campaign in one workspace. Whether you can actually run the test itself depends on what email service you send through.