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Official Node.js & TypeScript SDKNode 18+ & ESM / CJS

Type-safe Node.js & TypeScript email dispatch built for production

Official TypeScript SDK for Node.js backends, Express, NestJS, and Fastify. Built-in exponential backoff, cryptographic webhook verification, and per-key allowlists.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
100% Strict
TypeScript Types
Zero any types
v18, v20, v22+
Node Support
LTS certified
6,000 / mo
Free Tier
Forever free for dev
Developer Ergonomics

Drop into your application in under 60 seconds

Native typed interfaces with zero unnecessary dependencies. Built for standard fetch and modern edge runtimes.

$npm install sadasend
src/mailer.ts
typescript
TYPESCRIPT
import { SadaSend } from 'sadasend';

const sadasend = new SadaSend(process.env.SADASEND_API_KEY);

// Dispatch typed transactional email with promise handling
const { id, status } = await sadasend.emails.send({
  from: 'alerts@yourdomain.com',
  to: 'ops@company.com',
  subject: 'Database Backup Completed',
  text: 'Production snapshot #904 finished in 42 seconds.',
  tags: ['backup', 'ops'],
});

console.log(`Dispatched ID: ${id} with status: ${status}`);

Official Node.js client with complete TypeScript declarations, auto-retries, and connection pooling.

Core Infrastructure

Engineered for high deliverability and zero incident risk

Every layer from edge connection pooling to per-key rate limits is designed to keep critical transactional dispatches fast, reliable, and contained.

Strict TypeScript Definitions

Full IntelliSense autocompletion for requests, responses, headers, tags, and webhook payloads.

Automatic Exponential Backoff

Resilient HTTP client automatically retries transient network interruptions with jittered backoff.

HMAC Webhook Verification

Built-in sadasend.webhooks.verify() helper prevents forged event payloads and replay attacks.

Dual ESM & CommonJS Bundles

Native support for modern import syntax as well as legacy require() CommonJS projects.

Zero Native Addon Dependencies

Pure JavaScript/TypeScript implementation with zero node-gyp C++ compilation headaches.

Environment Variable Detection

Automatically discovers process.env.SADASEND_API_KEY for zero-boilerplate initialization.

Architectural Comparison

SadaSend vs Generic Node HTTP / Nodemailer

Compare official type-safe SDK with unmaintained legacy SMTP drivers.

Feature & CapabilitySadaSendGeneric Node HTTP / Nodemailer
Complete TypeScript DefinitionsCommunity @types only
HMAC Webhook Verification Helper
Automatic Retry on 429 / 5xxManual try/catch loops
Staging Domain Allowlists
low-latency Edge Response150 - 400ms
Free Monthly Sends6,000 / mo foreverRequires paid server
Forever Free Tier
Transparent Economics

Start with 3,000 emails every month at zero cost

No artificial paywalls on security. Unlike legacy providers that reserve recipient allowlists or dedicated IP pools for high enterprise tiers, every SadaSend account receives full safety controls from day one.

3,000 dispatches monthly forever with zero credit card
All safety gates, allowlists, and velocity limits included
Scale seamlessly: Starter ($12/mo for 10k), Pro ($19/mo for 50k), Scale ($79/mo for 250k)
Free Developer Plan
$0 / mo

No credit card required

Create Free AccountCompare all paid plan tiers
Frequently Asked Questions

Everything you need to know about Node.js email API

Clear, transparent answers on deliverability, API authentication, and rate limits.

The official SadaSend SDK supports all active Node.js LTS versions including Node 18, 20, 22, and 24, as well as Bun and Deno runtimes.
Technical Deep Dives

Related developer guides and architectural tutorials

Explore step-by-step production implementation blueprints, benchmarks, and protocols.

Documentation

Official Client SDKs (TypeScript & Python)

Official zero-dependency client SDKs for SadaSend. TypeScript and Python packages are live on npm and PyPI with typed results and auto-idempotency.

Read guide
Documentation

REST API Reference & Endpoints

Complete REST API reference for sending emails, managing API keys, tracking delivery events, and configuring recipient allowlists with low latency.

Read guide
Documentation

SMTP relay & framework integrations

Connect existing applications, WordPress, Supabase, Laravel, Django, and Nodemailer to SadaSend via standard SMTP relay with zero code changes.

Read guide
Deep Dive4 min read

Nodemailer in production: what breaks, and what to do about it

Nodemailer is excellent at composing and transmitting a message. Almost every production incident I have seen with it is about the code around it, not the library.

Read tutorial
Deep Dive3 min read

Nodemailer vs Native Fetch in 2026: Why Modern Runtimes Abandoned Legacy SMTP

Nodemailer served the Node.js ecosystem for 15 years. Here is why modern serverless and edge runtimes have replaced raw SMTP libraries with native fetch.

Read tutorial
Deep Dive3 min read

NestJS Enterprise Email Microservice with BullMQ & Redis Streams

Learn how to design an asynchronous email processor in NestJS with BullMQ that processes 50,000+ jobs/minute with guaranteed delivery and rate limiting.

Read tutorial
Deep Dive4 min read

Building a transactional email queue on Bun and BullMQ without losing messages

The worst bug an email service can have is not a crash. It is accepting a message, returning 202, and never sending it.

Read tutorial
Deep Dive2 min read

Email Threat Modeling for SaaS: Preventing Compromised API Key Abuse

What happens when an engineer accidentally commits an email API key to a public GitHub repo? Here is the threat model and defense blueprint.

Read tutorial