Mailgun
Battle-tested transactional email API trusted by over 150k developers. Mailgun offers reliable SMTP and HTTP APIs with advanced analytics, email validation, and inbound routing. Popular in enterprises migrating off self-hosted mail servers.
Proprietary
TypeScript / Python
Why Mailgun?
You need high-volume transactional email (100k+/mo)
You want built-in email validation API to reduce bounces
You need inbound email parsing (webhooks on received emails)
Enterprise requirements with dedicated IPs and HIPAA compliance
Signal Breakdown
What drives the Trust Score
Download Trend
Last 12 months
Tradeoffs & Caveats
Know before you commitYou're a small project (Resend has better DX at small scale)
You need a React Email template workflow (Resend wins here)
Pricing
Free tier & paid plans
Free: 100 emails/day forever (Flex plan)
Foundation $35/mo: 50k emails, email validation included
Pay-as-you-go pricing available above free tier
Alternative Tools
Other options worth considering
Modern transactional email API built for developers. Native React Email support, clean SDK, excellent deliverability, and a generous free tier (3k emails/month). The fastest-growing email tool in the ecosystem.
Twilio-owned email delivery platform trusted by 80k+ companies. SendGrid handles transactional and marketing email at scale with strong deliverability and detailed analytics.
Often Used Together
Complementary tools that pair well with Mailgun
Learning Resources
Docs, videos, tutorials, and courses
Get Started
Repository and installation options
npm install mailgun.js form-dataQuick Start
Copy and adapt to get going fast
import Mailgun from 'mailgun.js';
import FormData from 'form-data';
const mg = new Mailgun(FormData).client({
username: 'api',
key: process.env.MAILGUN_API_KEY!,
});
await mg.messages.create('yourdomain.com', {
from: 'hello@yourdomain.com',
to: ['user@example.com'],
subject: 'Welcome!',
text: 'Thanks for signing up.',
});Code Examples
Common usage patterns
Email validation before signup
Validate email addresses to reduce bounces
const result = await mg.validate.get('user@example.com');
// result.result === 'deliverable' | 'undeliverable' | 'risky'
if (result.result !== 'deliverable') {
throw new Error('Invalid email address');
}Community Notes
Real experiences from developers who've used this tool