Salesforce Marketing Cloud email builder

An email CMS for Salesforce Marketing Cloud.

Protect your design system while giving marketers freedom to update content. Build campaigns from reusable modules, preview live, export clean HTML to SFMC.

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The challenge

Why SFMC teams add a CMS layer

Salesforce is great for automation, sending, segmentation, and reporting. Building email content in Content Builder is the part that drags. Templates break on update. The 250-component cap bites. Auto-generated CSS overrides your styles. The brand drifts.

Modular Mail is an email CMS that sits alongside SFMC. You keep using Salesforce for everything it does well: automation, journeys, AMPscript, sending. You replace the template-building and campaign-content layer with a tool that locks the design and lets marketers self-serve.

The problem

Common Content Builder challenges

If any of these sound familiar, the gap is structural, not just workflow.

Content Builder learning curve

Content Builder feels unintuitive for marketers who just want to update copy or swap an image. The interface is complex, previews are slow, basic changes need training.

Templates break and the 250-component cap

Content Builder has a 250-component limit, and templates break when updated. Blocks duplicate, layouts shift, Journey Builder edits force new versions.

Brand consistency drift

Content Builder auto-generates CSS classes that override your styles. No custom webfonts, limited button styling. Hand-coding or external tools needed for a real design system.

Developer dependency

Most Content Builder changes need developer help. Marketing can't update templates safely. Production cycles drag.

Inconsistent rendering

Emails don't always render correctly in Outlook, Gmail, or mobile. Column spacing breaks, images scale wrong, hours go into testing and fixing.

Slow production cycles

Every change goes through dev. Journey Builder is rigid for email edits. With a CMS layer, marketers update independently while the design system stays intact.

How it works

Three stages from template to a sent campaign

Your templates are configured for your team. After that, marketers build campaigns without dev help.

  1. 01

    Your design system, configured for your team

    We convert your master HTML template (or Figma design) and define reusable modules using simple mm-editable tags. Or bring your own developer or agency. See the template setup service.

  2. 02

    Build campaigns visually

    Marketers build campaigns by selecting modules and filling in content fields. The design stays intact; the content is fully editable. AI Copy Assistant and AI Alt Text help speed things up.

  3. 03

    Export clean HTML to SFMC

    One-click export produces production-ready HTML that respects SFMC's formatting and component constraints. Upload to Email Studio. Add AMPscript and personalisation in SFMC.

The editor

What marketers see

A clean editor over a locked template. Pick a module, fill in content fields, pick a variant, preview, export.

The HTML stays out of the marketer's reach, so nothing drifts off-brand by accident.

  • Drag-and-drop modules
    Pick from a tested library; reorder by dragging.
  • Content fields, not HTML
    Marketers see fields; HTML stays out of reach.
  • Brand tokens
    Colour, type, spacing defined once and inherited everywhere.
  • Live preview
    Desktop and mobile preview as you type.
  • Clean SFMC export
    Production-ready HTML, no manual cleanup.
  • AI Copy Assistant
    Generate and refine copy in your brand voice.
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Modular Mail editor with content fields and module library
Comparison

Content Builder versus Content Builder + Modular Mail

A factual comparison. Add Modular Mail; keep SFMC.

Feature Content Builder Content Builder + Modular Mail Recommended
Template setup Content Builder editor + AMPscript wrappers Standard HTML with mm-editable tags
Component limit 250-component cap inside Content Builder No component cap; export complete HTML
Brand guardrails Limited content locking; auto-generated CSS overrides styles Locked structure, content-fields only
Custom webfonts Manual workarounds required Defined in template setup, applied automatically
Module reuse Inside Content Builder content blocks Visual module library with drag-and-drop
Preview and testing Slow preview, separate testing Live desktop and mobile preview, plus Litmus / EoA integration
ESP portability SFMC-only Export to any ESP
AI assistance Not available in editor AI Copy Assistant and AI Alt Text built in
Use cases

Who uses Modular Mail with SFMC

CRM and lifecycle marketing teams

Teams managing 20+ sends a month can't afford a dev round-trip on each one. A locked template system keeps quality up as volume grows.

Retail CRM teams managing weekly promotions, abandoned cart flows, and loyalty campaigns build every send from the same tested module set. Dev only gets involved when a new module is needed.

Agencies managing SFMC accounts

Deliver pixel-perfect, on-brand emails for multiple clients without endless revision cycles.

Agencies running SFMC programmes for several clients give each client their own module library. Producers build campaigns without pulling designers back in for every banner change.

Multi-region marketing teams

B2B and B2C teams localising campaigns across regions keep the design system intact while each market adapts the content.

A team launching in eight locales used to copy a master HTML file per market and hand-edit the content. Now regional producers pick the same modules and translate the content fields. Same brand, same structure, eight local versions in the time one used to take.

FAQ

Modular Mail with SFMC, in detail

  1. Can I keep using Salesforce Marketing Cloud with Modular Mail?
    Yes. Modular Mail is ESP-agnostic. You build emails in Modular Mail and export clean HTML that drops straight into SFMC or any other ESP. You don't replace existing tools; you replace the template-building workflow.
  2. How does Modular Mail handle SFMC's 250-component limit?
    The limit applies to Content Builder's drag-and-drop editor. With Modular Mail you build the email outside SFMC and export a complete HTML file. You're not restricted by SFMC's content-block count; design as many modules as you need.
  3. How long does migration from SFMC's email builder take?
    From a few hours for simpler designs to a couple of days for templates that need restructuring. We scope it during onboarding so there are no surprises.
  4. How is render consistency guaranteed?
    Modular Mail gives you control over the HTML rather than generating it for you. Your developer writes each module to modern best practices and accessibility guidelines. Once tested, modules render consistently across major clients.
  5. Can non-technical users really build emails without breaking them?
    Yes. Only the text, images, and links are editable. Layout and styles are locked by the developer; marketers update content confidently without touching code.
  6. What if I need help migrating my templates?
    We offer onboarding assistance and convert your existing SFMC templates or Figma designs into modular templates. We're available to support you throughout the process.
  7. Do I lose AMPscript or personalisation?
    No. The exported HTML works with all SFMC features. Add AMPscript, personalisation strings, and dynamic content after import. Modular Mail handles design and structure; SFMC handles sending and personalisation.
  8. Can I use this for Pardot too?
    Yes. Build and export modular templates for Pardot just as you would for SFMC. Same workflow across both platforms.
Get started

A CMS layer for your SFMC email programme.

See how Modular Mail works with your existing SFMC templates. Or let us convert them for you.

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