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Best React Email Libraries in 2026

·PkgPulse Team
react-emailmaizzlemjmlemail-templatesnodejs2026

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. For teams using React and Resend/Nodemailer, React Email is the clear pick.

Key Takeaways

  • React Email: ~800K weekly downloads — React components, live preview, Resend integration
  • MJML: ~600K downloads — XML → 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/SendGrid

React Email (Component-Based)

// React Email — component-based email templates
// emails/welcome.tsx
import {
  Body, Container, Head, Heading, Html, Img,
  Link, Preview, Section, Text, Button, Hr,
  Font, Tailwind,
} 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 — Tailwind variant (cleaner styles)
import { Tailwind } 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>
  );
}

// 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,  // React Email rendered HTML
  // Or: pass the component directly (Resend supports this)
  react: <WelcomeEmail userName="Alice" verificationUrl="..." userEmail="alice@example.com" />,
});

# 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 — 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
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 → 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
const transporter = nodemailer.createTransport({ /* ... */ });
await transporter.sendMail({
  from: 'noreply@pkgpulse.com',
  to: 'alice@example.com',
  subject: 'Welcome to PkgPulse',
  html: finalHtml,
});

Best for: Teams not using React, need maximum email client compatibility (Outlook, Gmail, Apple Mail).

Email Client Compatibility

TechniqueGmailOutlookApple MailiOS Mail
React Email✅✅✅✅
MJML✅✅✅✅
Hand-written HTML tables✅✅✅✅
CSS Grid / Flexbox✅❌✅✅
Tailwind (raw)✅❌✅✅

Both React Email and MJML compile to HTML tables under the hood — this is why both have excellent Outlook support.

When to Choose

ScenarioPick
React stack, TypeScript-firstReact Email
Paired with ResendReact Email (native support)
Non-React teamMJML
Designers writing email templatesMJML (XML is approachable)
Tailwind CSS everywhereReact Email + Tailwind
Maximum Outlook compatibilityMJML (battle-tested since 2015)
Component library / design systemReact Email
Simple transactional emailsEither — start with React Email

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