Best HTML email builders in 2026: comparison

Every HTML email builder promises the same thing: an email that looks right in Gmail, Outlook and on a phone, without writing tables by hand. They get there in very different ways, and the right choice depends less on features than on where your email goes next: into an ESP, into a Git repository, or into another product.

This comparison covers the tools we see most often. Disclosure: MailBuildr is our product. We have tried to describe its limits as plainly as the others'. Pricing changes often, so we do not quote prices; check each vendor's site.

What makes a good HTML email builder

• Rendering quality. Table-based layout, inline CSS, a fixed content width and a mobile fallback. Outlook for Windows still uses the Word engine, so anything built on flexbox or grid will break there.
• Portability. Can you export clean HTML and use it anywhere, or is the email tied to one platform?
• Speed for non-developers. Drag and drop, reusable sections, templates.
• Control for developers. Access to the code, version control, automation.
• Testing. Preview at desktop and mobile widths, test sends, and ideally screenshots in real clients.

Visual builders: Stripo, Beefree, Unlayer

Stripo

Stripo is one of the most complete visual email template builders. It combines a drag and drop editor with an HTML code editor, offers a large template library, reusable modules and team collaboration, and exports directly to dozens of ESPs.

Limits: the interface is dense and takes time to learn; the free plan caps monthly exports, and many features (more exports, more team members, advanced modules) are paid.

Best for: marketing teams that produce many campaigns and want a direct path into their ESP.

Beefree

Beefree is a drag and drop email builder with a clean interface, a large catalog of templates, and collaboration and brand-control features on paid plans. The same editor is sold to software vendors as the Beefree SDK, so you may already have used it inside another product.

Limits: the most useful team features sit on paid plans, and like most visual builders, fine control over the generated code is limited.

Best for: teams that want a polished visual editor with good templates, and SaaS vendors who want to embed an editor.

Unlayer

Unlayer is mainly an embeddable email and page editor: a component that developers drop into their own application, with an API to load and save designs and export HTML.

Limits: it is built to be integrated, so it makes most sense if you are building software. As a standalone tool for a marketer it is not the most direct option.

Best for: product teams adding email design to their own platform.

Code frameworks: MJML, Maizzle

MJML

MJML is an open-source markup language created by Mailjet. You write components such as <mj-section> and <mj-column>, and the compiler outputs responsive, table-based HTML that handles Outlook. It is free and has editor plugins and a large community.

Limits: you need to write code and run a build step; there is no visual editing for the people who write the copy.

Maizzle

Maizzle is a framework for building HTML emails with Tailwind CSS. You write HTML with utility classes, and the build inlines the CSS, removes unused styles and prepares the code for email clients.

Limits: it assumes you know HTML email techniques (tables, Outlook quirks) and a Node.js toolchain. Powerful in a developer workflow, unsuited to non-technical users.

Best for (both): developers who version templates in Git, automate builds and want total control.

ESP editors: Mailchimp, Brevo

Most email platforms include their own drag and drop editor. Mailchimp's and Brevo's are good enough for regular newsletters, and they have one big advantage: no export step, the email is already where it will be sent.

Limits: the design lives inside that platform. Moving it elsewhere means rebuilding it or extracting HTML that was not written to be reused. Layout options are also narrower than in dedicated builders.

Best for: teams committed to one ESP who send standard newsletters.

MailBuildr

MailBuildr is a block-based HTML email editor: headings, text, images, buttons, columns, social icons and more, assembled by drag and drop. You can start from a template, or describe the email in a sentence and let the AI draft a first version that you then edit block by block. The export is table-based HTML with inline CSS, with no proprietary markup, and can be copied, downloaded, opened in a Gmail or Outlook draft, or pasted into any ESP.

Limits: a smaller template library than Stripo or Beefree; no direct export to ESPs (you paste the HTML); collaboration features are basic compared with the visual leaders; no screenshots in real email clients. The free plan includes 10 exports per month and 5 saved templates, with a small MailBuildr footer in exported emails.

Best for: freelancers, small teams and developers who want a fast editor and clean HTML they can take anywhere. You can try the editor without an account.

How to choose

1. Start from the destination. If everything goes through one ESP, its editor or a builder with a direct export (Stripo, Beefree) saves the most time. If the email moves between tools, favor clean, portable HTML.
2. Decide who edits. Marketers need a visual editor; developers often prefer MJML or Maizzle. Some teams use both: developers build sections, marketers assemble them.
3. Test the output, not the editor. Export one real email from each candidate and open it in Outlook for Windows, Gmail and a phone. Our free email preview tool shows any HTML in a Gmail or Outlook inbox.
4. Check the free tier against your volume. Export caps, saved templates and branding footers differ a lot between tools.

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