Best React Email Libraries in 2026

Q: When to Choose?

React Email is the right choice for TypeScript stacks, teams using Resend, and anyone building transactional emails where dynamic data needs to be injected via component props. The live preview server and Tailwind support make it genuinely pleasant to work with. MJML is the right choice for teams not using React, designers who prefer an XML-based authoring model, or situations where maximum Outlook compatibility is the top priority. MJML has been testing against email clients since 2015 and has

TL;DR

React Email for component-based email in TypeScript; MJML for battle-tested cross-client rendering. React Email (~800K weekly downloads) is the modern approach — build emails with React components, preview live, and render to HTML. MJML (~600K downloads) uses a custom XML syntax that compiles to bulletproof HTML tables. Maizzle brings Tailwind CSS to email with a build-step CSS purging approach. For teams using React and Resend or Nodemailer, React Email is the clear pick in 2026.

Key Takeaways

React Email: ~800K weekly downloads — React components, live preview, Resend integration
MJML: ~600K downloads — XML to battle-tested HTML tables, 15+ email clients tested
@react-email/components: ~700K downloads — pre-built components (Button, Text, Image, etc.)
Maizzle: ~30K downloads — Tailwind CSS for emails via PostCSS
All tools — output static HTML that gets sent via Nodemailer, Resend, or SendGrid

The Email Rendering Problem

HTML email is famously difficult. Modern CSS has moved to flexbox, grid, custom properties, and logical properties — none of which work reliably in every email client. The culprit is Outlook 2016–2019 on Windows, which uses Microsoft Word's HTML renderer rather than a real browser engine. Word's HTML renderer supports roughly CSS from 2003: table layouts, inline styles, basic fonts, and not much else. Flexbox, CSS Grid, and gap all break silently in Outlook.

The libraries covered here solve this problem by generating table-based HTML under the hood, even when you write component-based or Tailwind-based templates. You write clean, modern code; the tool compiles it to the 1990s-era HTML that Outlook requires.

The other major constraint is that email HTML must use inline styles rather than stylesheets. External stylesheets are stripped by Gmail, Outlook, and most webmail clients. The tools below handle style inlining automatically.

Package Health Table

Package	Weekly Downloads	Approach	Cross-Client	Preview Server
`react-email`	~800K	React components	Yes (table output)	Yes
`@react-email/components`	~700K	Pre-built components	Yes	Yes
`mjml`	~600K	XML templating	Yes (bulletproof)	CLI
`maizzle`	~30K	Tailwind + PostCSS	Yes (inline CSS)	Yes
`handlebars`	~25M	String templates	Manual	No

React Email (Component-Based)

React Email lets you build email templates the same way you build React UI components. Each email is a React component that returns JSX. The @react-email/components package provides email-safe building blocks — Button, Container, Html, Head, Preview, Section, Text, Link, Img, Hr — that render to the correct table-based HTML under the hood.

The development experience is far better than traditional email development. Run react-email dev and you get a live preview server that renders your email components in the browser. You can see exactly how your email looks without sending to yourself repeatedly. The preview server also lets you switch between email clients (Gmail, Apple Mail, Outlook) to check rendering, though this is simulated rather than actual client rendering.

npm install react-email @react-email/components

// emails/welcome.tsx — a complete welcome email
import {
  Body, Container, Head, Heading, Html, Img,
  Link, Preview, Section, Text, Button, Hr,
  Font,
} from '@react-email/components';

interface WelcomeEmailProps {
  userName: string;
  verificationUrl: string;
  userEmail: string;
}

export default function WelcomeEmail({
  userName,
  verificationUrl,
  userEmail,
}: WelcomeEmailProps) {
  return (
    <Html>
      <Head>
        <Font
          fontFamily="Inter"
          fallbackFontFamily="Arial"
          webFont={{
            url: 'https://fonts.gstatic.com/s/inter/v13/...woff2',
            format: 'woff2',
          }}
          fontWeight={400}
          fontStyle="normal"
        />
      </Head>
      <Preview>Welcome to PkgPulse, {userName}!</Preview>
      <Body style={{ backgroundColor: '#f6f9fc', fontFamily: 'Inter, Arial, sans-serif' }}>
        <Container style={{ maxWidth: '600px', margin: '0 auto', padding: '40px 20px' }}>
          <Img
            src="https://pkgpulse.com/logo.png"
            alt="PkgPulse"
            width={120}
            height={40}
          />
          <Heading style={{ color: '#1a1a1a', fontSize: '24px' }}>
            Welcome, {userName}!
          </Heading>
          <Text style={{ color: '#555', fontSize: '16px', lineHeight: '24px' }}>
            Your account is ready. Verify your email to get started tracking
            npm package health.
          </Text>
          <Section style={{ textAlign: 'center', marginTop: '32px' }}>
            <Button
              href={verificationUrl}
              style={{
                backgroundColor: '#3B82F6',
                color: '#fff',
                padding: '12px 24px',
                borderRadius: '6px',
                fontSize: '16px',
                fontWeight: 600,
                textDecoration: 'none',
              }}
            >
              Verify Email
            </Button>
          </Section>
          <Hr style={{ borderColor: '#e5e7eb', marginTop: '32px' }} />
          <Text style={{ color: '#9ca3af', fontSize: '12px' }}>
            Sent to {userEmail}. If you didn't sign up,{' '}
            <Link href="https://pkgpulse.com/unsubscribe" style={{ color: '#9ca3af' }}>
              unsubscribe here
            </Link>.
          </Text>
        </Container>
      </Body>
    </Html>
  );
}

// Preview props for the live dev server
WelcomeEmail.PreviewProps = {
  userName: 'Alice',
  verificationUrl: 'https://pkgpulse.com/verify?token=abc123',
  userEmail: 'alice@example.com',
} satisfies WelcomeEmailProps;

React Email also supports Tailwind via the <Tailwind> wrapper component. Instead of inline style objects, you write Tailwind classes and the component handles the style inlining:

// React Email — Tailwind variant (cleaner styles)
import { Tailwind, Body, Container, Heading, Text, Section, Row, Column } from '@react-email/components';

export default function OrderEmail({ order }) {
  return (
    <Html>
      <Tailwind
        config={{
          theme: {
            extend: {
              colors: { brand: '#3B82F6' },
            },
          },
        }}
      >
        <Body className="bg-gray-50 font-sans">
          <Container className="max-w-xl mx-auto p-10">
            <Heading className="text-2xl font-bold text-gray-900">
              Order #{order.id} confirmed
            </Heading>
            <Text className="text-gray-600 mt-2">
              Your order of <strong>{order.items.length} items</strong> is being processed.
            </Text>
            <Section className="mt-6 bg-white rounded-lg p-6 border border-gray-200">
              {order.items.map((item) => (
                <Row key={item.id} className="py-3 border-b border-gray-100">
                  <Column className="text-gray-800">{item.name}</Column>
                  <Column className="text-right font-semibold">${item.price}</Column>
                </Row>
              ))}
              <Row className="pt-4">
                <Column className="text-gray-600">Total</Column>
                <Column className="text-right text-xl font-bold">${order.total}</Column>
              </Row>
            </Section>
          </Container>
        </Body>
      </Tailwind>
    </Html>
  );
}

Rendering and Sending

The render() function from @react-email/render converts your React component to an HTML string ready for sending:

// React Email — render to HTML for sending
import { render } from '@react-email/render';
import WelcomeEmail from './emails/welcome';

// Render to HTML string
const html = await render(
  <WelcomeEmail
    userName="Alice"
    verificationUrl="https://pkgpulse.com/verify?token=abc123"
    userEmail="alice@example.com"
  />
);

// Send via Resend (recommended pairing)
import { Resend } from 'resend';
const resend = new Resend(process.env.RESEND_API_KEY!);

await resend.emails.send({
  from: 'noreply@pkgpulse.com',
  to: 'alice@example.com',
  subject: 'Welcome to PkgPulse',
  html,
  // Resend also accepts the component directly:
  react: <WelcomeEmail userName="Alice" verificationUrl="..." userEmail="alice@example.com" />,
});

Resend is the email sending service built by the same team as React Email, so the integration is particularly smooth — Resend accepts React components directly and handles the render() call internally.

# React Email dev server — live preview
npx react-email dev

# Opens: localhost:3000
# Live preview of all emails in /emails folder
# No need to send to yourself to check rendering

MJML (Battle-Tested Cross-Client)

MJML has been around since 2015 and has the most battle-tested track record for cross-client rendering. The library maintains a comprehensive test suite against real email clients — Gmail, Outlook 2013–2021, Apple Mail, Yahoo, and others. When you see an MJML-generated email, you are seeing HTML generated by a system specifically designed to work around known client bugs.

MJML uses an XML-based syntax with its own tag set: <mj-section> for horizontal layout, <mj-column> for vertical within that, <mj-text> for text blocks, and so on. The compiler transforms these into the appropriate HTML table structure.

<!-- MJML — XML syntax that compiles to bulletproof HTML tables -->
<!-- emails/welcome.mjml -->
<mjml>
  <mj-head>
    <mj-attributes>
      <mj-all font-family="Arial, sans-serif" />
      <mj-text font-size="16px" line-height="24px" color="#555" />
    </mj-attributes>
    <mj-preview>Welcome to PkgPulse!</mj-preview>
  </mj-head>

  <mj-body background-color="#f6f9fc">
    <mj-section padding="40px 20px">
      <mj-column>
        <mj-image src="https://pkgpulse.com/logo.png" width="120px" alt="PkgPulse" />
        <mj-text font-size="24px" color="#1a1a1a" font-weight="bold">
          Welcome, {{userName}}!
        </mj-text>
        <mj-text>
          Your account is ready. Verify your email to get started.
        </mj-text>
        <mj-button
          background-color="#3B82F6"
          color="#ffffff"
          border-radius="6px"
          href="{{verificationUrl}}"
        >
          Verify Email
        </mj-button>
        <mj-divider border-color="#e5e7eb" />
        <mj-text font-size="12px" color="#9ca3af">
          Sent to {{userEmail}}.
        </mj-text>
      </mj-column>
    </mj-section>
  </mj-body>
</mjml>

// MJML — compile and send with variable interpolation
import mjml2html from 'mjml';
import * as fs from 'fs';
import Handlebars from 'handlebars';

const mjmlTemplate = fs.readFileSync('./emails/welcome.mjml', 'utf-8');

// 1. Compile MJML to HTML
const { html, errors } = mjml2html(mjmlTemplate, { minify: true });
if (errors.length) throw new Error(errors[0].formattedMessage);

// 2. Interpolate variables with Handlebars
const template = Handlebars.compile(html);
const finalHtml = template({
  userName: 'Alice',
  verificationUrl: 'https://pkgpulse.com/verify?token=abc123',
  userEmail: 'alice@example.com',
});

// 3. Send via Nodemailer
import nodemailer from 'nodemailer';
const transporter = nodemailer.createTransport({ /* SMTP config */ });
await transporter.sendMail({
  from: 'noreply@pkgpulse.com',
  to: 'alice@example.com',
  subject: 'Welcome to PkgPulse',
  html: finalHtml,
});

MJML is not a React tool and does not require React in your stack. It is a compilation step that runs at build time or at send time. This makes it a good fit for backend services, Python or Ruby projects using a Node.js subprocess for email rendering, or teams where the email developer is a designer rather than a TypeScript developer.

Handlebars and EJS (Legacy Transactional Emails)

Handlebars and EJS remain widely used in older Node.js codebases. They are simple string templating systems — no build step, no special HTML structure, just a template string with variable placeholders. They have no opinions about email-safe HTML; you write the table-based HTML yourself.

// Handlebars — simple string templates
import Handlebars from 'handlebars';

const template = Handlebars.compile(`
  <html>
  <body style="font-family: Arial, sans-serif;">
    <table width="600" cellpadding="0" cellspacing="0" style="margin: 0 auto;">
      <tr>
        <td style="padding: 20px;">
          <h2>Hello, {{userName}}!</h2>
          <p>Your verification link: <a href="{{verificationUrl}}">Click here</a></p>
        </td>
      </tr>
    </table>
  </body>
  </html>
`);

const html = template({ userName: 'Alice', verificationUrl: 'https://...' });

Handlebars is dependency-light and has no opinions about your stack. The downside is that you are responsible for writing email-safe HTML, which means writing table layouts by hand. In 2026, there is rarely a good reason to start a new project with Handlebars for email when React Email or MJML are available, but maintaining existing Handlebars templates is perfectly reasonable.

Maizzle (Tailwind CSS for Email)

Maizzle is a framework that brings Tailwind CSS to email development via a build-step CSS inlining approach. You write templates in HTML with Tailwind classes, and Maizzle's build step resolves the classes, generates CSS, and inlines it as attributes on each element — producing email-safe HTML.

<!-- Maizzle — Tailwind-powered email template -->
<!-- src/templates/welcome.html -->
<x-main>
  <table class="w-600 mx-auto">
    <tr>
      <td class="p-10 bg-white">
        <h1 class="text-2xl font-bold text-gray-900 mb-4">
          Welcome, {{ userName }}!
        </h1>
        <p class="text-base text-gray-600 mb-6">
          Your account is ready. Verify your email to get started.
        </p>
        <a
          href="{{ verificationUrl }}"
          class="inline-block px-6 py-3 bg-blue-500 text-white rounded-md text-base font-semibold no-underline"
        >
          Verify Email
        </a>
      </td>
    </tr>
  </table>
</x-main>

Maizzle's Tailwind configuration uses email-specific utilities — it knows which CSS properties are safe in email contexts and strips the rest. The result is a clean authoring experience for teams that already use Tailwind on the frontend.

The trade-off is a build step that is separate from your main application build. The output HTML is static and needs variable interpolation at send time (using something like Handlebars for dynamic content), making it more suited for marketing email templates than transactional emails where data is dynamic.

Email Client Compatibility Reality

Building for email in 2026 means designing around constraints that do not exist in modern web development.

Outlook 2016–2019 (still widely used in corporate environments) renders HTML using Microsoft Word's engine. This means no flexbox, no CSS Grid, no CSS custom properties, no sticky positioning, no gap, and limited border-radius support. Buttons need to use <table> and <td> for background colors to work correctly.

Gmail strips <head> and <style> tags in some contexts, which is why inline styles are required. Gmail also clips emails over approximately 102KB, which affects very long email templates.

Apple Mail and iOS Mail have excellent CSS support — they will render almost any modern CSS correctly. The frustration is that designing for the best client (Apple Mail) means testing against the worst (Outlook) and finding a common subset.

Technique	Gmail	Outlook 2019	Apple Mail	iOS Mail
React Email	Yes	Yes	Yes	Yes
MJML	Yes	Yes	Yes	Yes
Hand-written HTML tables	Yes	Yes	Yes	Yes
CSS Grid / Flexbox	Yes	No	Yes	Yes
Tailwind (raw, not inlined)	No	No	Yes	Yes
CSS custom properties	Partial	No	Yes	Yes

React Email and MJML both compile to HTML tables and inline all styles. This is why both have excellent Outlook support despite offering modern authoring experiences. You get the developer experience of 2026 and the compatibility of 1999.

Comparison Table

	React Email	MJML	Maizzle	Handlebars
Authoring style	React/TSX	XML	Tailwind HTML	String templates
TypeScript	Yes, native	No	No	No
Cross-client	Yes	Yes (best)	Yes	Manual
Preview server	Yes	CLI only	Yes	No
Resend integration	Native	No	No	No
Weekly downloads	~800K	~600K	~30K	~25M
Best for	React/TS teams	Non-React, max compat	Tailwind-based marketing	Legacy codebases

When to Choose

React Email is the right choice for TypeScript stacks, teams using Resend, and anyone building transactional emails where dynamic data needs to be injected via component props. The live preview server and Tailwind support make it genuinely pleasant to work with.

MJML is the right choice for teams not using React, designers who prefer an XML-based authoring model, or situations where maximum Outlook compatibility is the top priority. MJML has been testing against email clients since 2015 and has the most battle-hardened cross-client track record of any tool listed here.

Maizzle shines for marketing email templates where Tailwind is already the design system language and the team wants to use the same utility classes across web and email. Less suited for dynamic transactional emails.

Handlebars or EJS make sense when maintaining an existing codebase that uses them, or in server-side environments where React is not available and you are writing the table HTML yourself.

How to add email sending to a Node.js app: /blog/how-to-add-email-sending-nodejs
React Email package health metrics: /packages/react-email
Resend package health and API reference: /packages/resend

The 2026 JavaScript Stack Cheatsheet