Resend Has a Free Email API — Send Transactional Emails Without the Pain

Resend is a modern email API for developers — send transactional emails that actually reach the inbox.

What You Get for Free (Free Tier)

• 3,000 emails/month — enough for most startups
• 100 emails/day — no credit card required
• React Email — build emails with React components
• SMTP & API — send via REST API or standard SMTP
• Webhooks — delivery, bounce, open, click events
• Custom domains — send from [e-mail]
• Multiple domains — one account, many domains
• Analytics — open rates, click rates, bounces

Quick Start

npm install resend

import { Resend } from 'resend'

const resend = new Resend('re_123456789')

await resend.emails.send({
  from: '[e-mail]',
  to: '[e-mail]',
  subject: 'Welcome!',
  html: '<h1>Welcome to our app!</h1>'
})

Why Developers Switch from SendGrid/Mailgun

Legacy email providers have terrible DX:

• Simple API — 5 lines of code vs SendGrid's 20+
• React Email — build emails in JSX, not HTML tables
• Better deliverability — purpose-built for transactional email
• Modern dashboard — see every email, every event

A SaaS startup's SendGrid welcome emails had 65% open rate. After switching to Resend with React Email templates: 78% open rate — same content, better deliverability.

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