Skip to content
Next.js 15 & React 19 ReadyServer Actions & App Router

Send transactional email in Next.js in 60 seconds with native Server Actions

First-class email client designed for Next.js App Router, React Server Components, and Vercel edge runtime. low-latency dispatch with zero cold starts.

3,000 emails/month freeZero credit card requiredSub-20ms edge latency
202 Accepted
Edge Dispatch
Queued durably before any provider call
< 5 KB
Bundle Footprint
Zero heavy dependencies
6,000
Free Tier
Emails / month forever
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 @react-email/components
app/actions/send-email.ts
typescript
TYPESCRIPT
'use server';

import { SadaSend } from 'sadasend';

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

export async function sendWelcomeEmail(to: string, name: string) {
  return await sadasend.emails.send({
    from: 'onboarding@yourdomain.com',
    to,
    subject: `Welcome to the Platform, ${name}!`,
    html: `<h1>Welcome ${name}</h1><p>Your workspace is ready.</p>`,
  });
}

Next.js 15 Server Action using native fetch with zero bundle bloat and automatic edge execution.

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.

Next.js 15 Server Actions

Works seamlessly inside server actions and route handlers with zero Node.js polyfill requirements.

Edge Runtime Compatible

Native global fetch implementation runs anywhere: Vercel Edge, Cloudflare Pages, Netlify, or AWS Lambda.

Zero Cold-Start Lag

Lightweight HTTP client avoids heavyweight SMTP connection handshakes that freeze serverless functions.

React Email Components

Render JSX templates directly or use raw HTML strings with automated responsive styling.

Staging Domain Guard

Local development and Vercel preview URLs automatically respect per-key recipient allowlists.

RFC 8058 Header Automation

Injects compliant List-Unsubscribe headers automatically to meet Google and Yahoo 2026 inbox standards.

Architectural Comparison

SadaSend vs Nodemailer / Legacy SMTP

Compare modern Next.js edge dispatch against legacy Nodemailer serverless setups.

Feature & CapabilitySadaSendNodemailer / Legacy SMTP
Vercel / Edge Runtime ExecutionFails (requires Node net/tls)
Serverless cold startNone — one HTTPS call, no handshake800ms - 2,500ms (SMTP handshake)
Vercel Preview Branch GuardAutomated allowlistAccidental customer sends
Native React Email SupportManual renderToString boilerplate
Webhook Verification HelperBuilt-in HMAC verifierManual crypto shims
Free Monthly Sends6,000 / mo foreverRequires paid relay
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 Next.js email

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

Yes! SadaSend is built on modern global fetch and is 100% compatible with Next.js 15 Server Actions, Route Handlers (app/api/...), and Server Components.
Technical Deep Dives

Related developer guides and architectural tutorials

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

Documentation

React Email Templates & Integration

How to build, preview, and send transactional emails using React Email and JSX components with zero-bleed preheaders and Outlook MSO support on SadaSend.

Read guide
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
Deep Dive3 min read

Sending Transactional Email in Next.js 15 (App Router & React Email)

Render responsive React components to clean HTML strings and dispatch them via Next.js 15 Server Actions with zero external SMTP dependencies.

Read tutorial
Deep Dive3 min read

Production React Email Deliverability: Zero-Bleed Preheaders, Outlook MSO & Gmail Clipping Defense

Rendering React Email in production? Learn how to avoid Gmail 102 KB clipping, prevent preheader snippet leakage, handle Outlook Word HTML tables, and support Apple Mail dark mode.

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 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 Dive4 min read

Prevent Staging Email Leaks: Recipient Allowlist Guide

A single test script or database seed in staging can accidentally blast thousands of fake password resets to real customers. Here is how to engineer zero-leak staging pipelines.

Read tutorial