Transactional Email API - Developer-First Email Infrastructure | SMASHSEND

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   Transactional Email API

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Transactional emails your users actually get

Developer-first email API that delivers critical emails in milliseconds, not minutes. Built for reliability, speed, and scale.

100k emails/month free · No credit card

terminal — @smashsend/node

$ npm install @smashsend/node

✓ Installed in 1.2s

const smashsend = new SmashSend('your-api-key');

await smashsend.emails.send({
  to: 'user@example.com',
  subject: 'Welcome!',
  html: '<h1>Hello World</h1>'
});

✓ Email delivered in 47ms

Built for speed & reliability

When your business depends on email delivery, you need infrastructure you can trust. That's why leading companies rely on SMASHSEND.

30M+

Emails sent

12M+

Contacts

99%

Delivery rate

Simple API, powerful features

RESTful API

Clean, intuitive API design with comprehensive documentation. SDKs available for Node.js, Python, Ruby, PHP, Go, and more.

Real-time webhooks

Get instant notifications for opens, clicks, bounces, and spam reports. Build reactive workflows with reliable webhook delivery.

Enterprise security

SOC 2 Type II certified. End-to-end encryption, dedicated IPs, and custom domains. GDPR and CCPA compliant.

Smart delivery

Automatic retry logic, bounce handling, and reputation monitoring. We optimize delivery so you don't have to.

Batch sending

Send to thousands of recipients with a single API call. Automatic throttling and queue management included.

Template engine

Store and version your email templates. Use variables, conditionals, and loops with our powerful templating language.

Start sending in minutes

Our API is designed to get you up and running fast. Choose your language and start sending.

const smashsend = require('smashsend');
const client = smashsend('YOUR_API_KEY');

// Send a transactional email
await client.emails.send({
  to: 'customer@example.com',
  from: 'your-app@yourdomain.com',
  subject: 'Welcome to Our Platform!',
  html: '<h1>Thanks for signing up!</h1>',
  text: 'Thanks for signing up!'
});

Perfect for every use case

E-commerce

Every step of the order

Order confirmations, shipping notifications, cart abandonment, and review requests.

Authentication

The emails users wait for

Welcome emails, password resets, 2FA codes, and account verification.

SaaS platforms

Keep accounts informed

Usage alerts, invoice emails, team invitations, and trial expiration notices.

Advanced features for scale

As you grow, SMASHSEND grows with you. Enterprise features available from day one, no upgrades needed.

Automatic retries

Failed deliveries are automatically retried with exponential backoff. Our smart retry logic ensures maximum deliverability without overwhelming recipient servers.

Detailed analytics

Track every email with real-time analytics. Monitor delivery rates, open rates, click-through rates, and more. Export data or use our webhook API for custom analytics.

Global infrastructure

Send from data centers worldwide for optimal delivery speed. Automatic geo-routing ensures your emails reach recipients fast, wherever they are.

Spam protection

Built-in spam detection and prevention. We monitor your reputation and provide feedback to ensure your emails reach the inbox, not spam.

Trusted by developers worldwide

“SMASHSEND's API is exactly what we needed. Clean, fast, and reliable. We migrated in a day and haven't looked back.” — Alex Chen, CTO at TechStartup

• 50% faster API response times than legacy providers
• 3x better deliverability than commodity relays
• 60% cheaper than raw cloud sending, with support included

Complete email platform

Need more than transactional emails? SMASHSEND has you covered.

Start sending in 5 minutes

Get started with our lightning-fast transactional email infrastructure.

No credit card required • 99% uptime SLA